changeset 2830:4a513df0df12

6990846: Demo: NIO.2 filesystem provider for zip/jar archives Summary: The first drop of the zip filesystem provider, as a separate demo Reviewed-by: alanb
author sherman
date Fri, 08 Oct 2010 21:33:28 -0700
parents d5fc514976fa
children e250cef36ea0
files make/mkdemo/Makefile make/mkdemo/nio/Makefile make/mkdemo/nio/zipfs/Makefile src/share/demo/nio/zipfs/Demo.java src/share/demo/nio/zipfs/META-INF/services/java.nio.file.spi.FileSystemProvider src/share/demo/nio/zipfs/README.txt src/share/demo/nio/zipfs/com/sun/nio/zipfs/JarFileSystemProvider.java src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipCoder.java src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipConstants.java src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipDirectoryStream.java src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipFileAttributeView.java src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipFileAttributes.java src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipFileStore.java src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipFileSystem.java src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipFileSystemProvider.java src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipInfo.java src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipPath.java src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipUtils.java test/demo/zipfs/Basic.java test/demo/zipfs/PathOps.java test/demo/zipfs/ZipFSTester.java test/demo/zipfs/basic.sh
diffstat 22 files changed, 6954 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/make/mkdemo/Makefile	Mon Oct 04 14:39:57 2010 -0700
+++ b/make/mkdemo/Makefile	Fri Oct 08 21:33:28 2010 -0700
@@ -31,7 +31,7 @@
 PRODUCT = demos
 include $(BUILDDIR)/common/Defs.gmk
 
-SUBDIRS            = jni
+SUBDIRS            = jni nio
 SUBDIRS_desktop    = applets jfc
 SUBDIRS_management = management
 SUBDIRS_misc       = scripting
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/make/mkdemo/nio/Makefile	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,39 @@
+#
+# Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.  Oracle designates this
+# particular file as subject to the "Classpath" exception as provided
+# by Oracle in the LICENSE file that accompanied this code.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+#
+# Makefile for building the jfc demos
+#
+
+BUILDDIR = ../..
+PRODUCT = demos
+include $(BUILDDIR)/common/Defs.gmk
+
+SUBDIRS = zipfs
+include $(BUILDDIR)/common/Subdirs.gmk
+
+all build clean clobber::
+	$(SUBDIRS-loop)
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/make/mkdemo/nio/zipfs/Makefile	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,44 @@
+#
+# Copyright (c) 1997, 2002, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.  Oracle designates this
+# particular file as subject to the "Classpath" exception as provided
+# by Oracle in the LICENSE file that accompanied this code.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+#
+# Makefile to build the ZipFileSystem demo.
+#
+
+BUILDDIR = ../../..
+PRODUCT = demo/zipfs
+DEMONAME = zipfs
+include $(BUILDDIR)/common/Defs.gmk
+
+DEMO_ROOT       = $(SHARE_SRC)/demo/nio/$(DEMONAME)
+DEMO_TOPFILES   = ./README.txt
+DEMO_SRCDIR     = $(DEMO_ROOT)
+DEMO_DESTDIR    = $(DEMODIR)/nio/$(DEMONAME)
+
+#
+# Demo jar building rules.
+#
+include $(BUILDDIR)/common/Demo.gmk
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/demo/nio/zipfs/Demo.java	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,664 @@
+/*
+ * Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Oracle nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+import java.io.*;
+import java.nio.*;
+import java.nio.channels.*;
+import java.nio.file.*;
+import java.nio.file.attribute.*;
+import java.net.*;
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.*;
+
+import static java.nio.file.StandardOpenOption.*;
+import static java.nio.file.StandardCopyOption.*;
+
+/*
+ * ZipFileSystem usage demo
+ *
+ * java [-cp .../zipfs.jar:./] Demo action ZipfileName [...]
+ *
+ * To deploy the provider, either copy the zipfs.jar into JDK/JRE
+ * extensions directory or add
+ *      <JDK_HOME>/demo/nio/ZipFileSystem/zipfs.jar
+ * into your class path as showed above.
+ *
+ * @author Xueming Shen
+ */
+
+public class Demo {
+
+    static enum Action {
+        rename,          // <java Demo rename zipfile src dst>
+                         // rename entry src to dst inside zipfile
+
+        movein,          // <java Demo movein zipfile src dst>
+                         // move an external src file into zipfile
+                         // as entry dst
+
+        moveout,         // <java Demo moveout zipfile src dst>
+                         // move a zipfile entry src out to dst
+
+        copy,            // <java Demo copy zipfile src dst>
+                         // copy entry src to dst inside zipfile
+
+        copyin,          // <java Demo copyin zipfile src dst>
+                         // copy an external src file into zipfile
+                         // as entry dst
+
+        copyout,         // <java Demo copyout zipfile src dst>
+                         // copy zipfile entry src" out to file dst
+
+        zzmove,          // <java Demo zzmove zfsrc zfdst path>
+                         // move entry path/dir from zfsrc to zfdst
+
+        zzcopy,          // <java Demo zzcopy zfsrc zfdst path>
+                         // copy path from zipfile zfsrc to zipfile
+                         // zfdst
+
+        attrs,           // <java Demo attrs zipfile path>
+                         // printout the attributes of entry path
+
+        attrsspace,      // <java Demo attrsspace zipfile path>
+                         // printout the storespace attrs of entry path
+
+        setmtime,        // <java Demo setmtime zipfile "MM/dd/yy-HH:mm:ss" path...>
+                         // set the lastModifiedTime of entry path
+
+        lsdir,           // <java Demo lsdir zipfile dir>
+                         // list dir's direct child files/dirs
+
+        mkdir,           // <java Demo mkdir zipfile dir>
+
+        mkdirs,          // <java Demo mkdirs zipfile dir>
+
+        rmdirs,          // <java Demo rmdirs zipfile dir>
+
+        list,            // <java Demo list zipfile [dir]>
+                         // recursively list all entries of dir
+                         // via DirectoryStream
+
+        tlist,           // <java Demo tlist zipfile [dir]>
+                         // list with buildDirTree=true
+
+        vlist,           // <java Demo vlist zipfile [dir]>
+                         // recursively verbose list all entries of
+                         // dir via DirectoryStream
+
+        walk,            // <java Demo walk zipfile [dir]>
+                         // recursively walk all entries of dir
+                         // via Files.walkFileTree
+
+        twalk,           // <java Demo twalk zipfile [dir]>
+                         // walk with buildDirTree=true
+
+        extract,         // <java Demo extract zipfile file [...]>
+
+        update,          // <java Demo extract zipfile file [...]>
+
+        delete,          // <java Demo delete zipfile file [...]>
+
+        add,             // <java Demo add zipfile file [...]>
+
+        create,          // <java Demo create zipfile file [...]>
+                         // create a new zipfile if it doesn't exit
+                         // and then add the file(s) into it.
+
+        attrs2,          // <java Demo attrs2 zipfile file [...]>
+                         // test different ways to print attrs
+    }
+
+    public static void main(String[] args) throws Throwable {
+
+        Action action = Action.valueOf(args[0]);;
+        Map<String, Object> env = env = new HashMap<String, Object>();
+        if (action == Action.create)
+            env.put("createNew", true);
+        if (action == Action.tlist || action == Action.twalk)
+            env.put("buildDirTree", true);
+
+        FileSystem fs = FileSystems.newFileSystem(
+                            URI.create("zip" + Paths.get(args[1]).toUri().toString().substring(4)),
+                            env,
+                            null);
+        try {
+            FileSystem fs2;
+            Path path, src, dst;
+            boolean isRename = false;
+            switch (action) {
+            case rename:
+                src = fs.getPath(args[2]);
+                dst = fs.getPath(args[3]);
+                src.moveTo(dst);
+                break;
+            case moveout:
+                src = fs.getPath(args[2]);
+                dst = Paths.get(args[3]);
+                src.moveTo(dst);
+                break;
+            case movein:
+                src = Paths.get(args[2]);
+                dst = fs.getPath(args[3]);
+                src.moveTo(dst);
+                break;
+            case copy:
+                src = fs.getPath(args[2]);
+                dst = fs.getPath(args[3]);
+                src.copyTo(dst);
+                break;
+            case copyout:
+                src = fs.getPath(args[2]);
+                dst = Paths.get(args[3]);
+                src.copyTo(dst);
+                break;
+            case copyin:
+                src = Paths.get(args[2]);
+                dst = fs.getPath(args[3]);
+                src.copyTo(dst);
+                break;
+            case zzmove:
+                fs2 = FileSystems.newFileSystem(
+                    URI.create("zip" + Paths.get(args[2]).toUri().toString().substring(4)),
+                    env,
+                    null);
+                //sf1.getPath(args[3]).moveTo(fs2.getPath(args[3]));
+                z2zmove(fs, fs2, args[3]);
+                fs2.close();
+                break;
+            case zzcopy:
+                fs2 = FileSystems.newFileSystem(
+                    URI.create("zip" + Paths.get(args[2]).toUri().toString().substring(4)),
+                    env,
+                    null);
+                //sf1.getPath(args[3]).copyTo(fs2.getPath(args[3]));
+                z2zcopy(fs, fs2, args[3]);
+                fs2.close();
+                break;
+            case attrs:
+                for (int i = 2; i < args.length; i++) {
+                    path = fs.getPath(args[i]);
+                    System.out.println(
+                        Attributes.readBasicFileAttributes(path).toString());
+                }
+                break;
+            case setmtime:
+                DateFormat df = new SimpleDateFormat("MM/dd/yyyy-HH:mm:ss");
+                Date newDatetime = df.parse(args[2]);
+                for (int i = 3; i < args.length; i++) {
+                    path = fs.getPath(args[i]);
+                    path.setAttribute("lastModifiedTime",
+                                      FileTime.fromMillis(newDatetime.getTime()));
+                    System.out.println(
+                        Attributes.readBasicFileAttributes(path).toString());
+                }
+                break;
+            case attrsspace:
+                path = fs.getPath("/");
+                FileStore fstore = path.getFileStore();
+                //System.out.println(fstore.getFileStoreAttributeView(FileStoreSpaceAttributeView.class)
+                //                         .readAttributes());
+                // or
+                System.out.printf("filestore[%s]%n", fstore.name());
+                System.out.printf("    totalSpace: %d%n",
+                                  (Long)fstore.getAttribute("space:totalSpace"));
+                System.out.printf("   usableSpace: %d%n",
+                                  (Long)fstore.getAttribute("space:usableSpace"));
+                System.out.printf("  unallocSpace: %d%n",
+                                  (Long)fstore.getAttribute("space:unallocatedSpace"));
+                break;
+            case list:
+            case tlist:
+                if (args.length < 3)
+                    list(fs.getPath("/"), false);
+                else
+                    list(fs.getPath(args[2]), false);
+                break;
+            case vlist:
+                if (args.length < 3)
+                    list(fs.getPath("/"), true);
+                else
+                    list(fs.getPath(args[2]), true);
+                break;
+            case twalk:
+            case walk:
+                walk(fs.getPath((args.length > 2)? args[2] : "/"));
+                break;
+            case extract:
+                if (args.length == 2) {
+                     extract(fs, "/");
+                } else {
+                    for (int i = 2; i < args.length; i++) {
+                        extract(fs, args[i]);
+                    }
+                }
+                break;
+            case delete:
+                for (int i = 2; i < args.length; i++)
+                    fs.getPath(args[i]).delete();
+                break;
+            case create:
+            case add:
+            case update:
+                for (int i = 2; i < args.length; i++) {
+                    update(fs, args[i]);
+                }
+                break;
+            case lsdir:
+                path = fs.getPath(args[2]);
+                final String fStr = (args.length > 3)?args[3]:"";
+                DirectoryStream<Path> ds = path.newDirectoryStream(
+                    new DirectoryStream.Filter<Path>() {
+                        public boolean accept(Path path) {
+                            return path.toString().contains(fStr);
+                        }
+                    });
+                for (Path p : ds)
+                    System.out.println(p);
+                break;
+            case mkdir:
+                fs.getPath(args[2]).createDirectory();
+                break;
+            case mkdirs:
+                mkdirs(fs.getPath(args[2]));
+                break;
+            case attrs2:
+                for (int i = 2; i < args.length; i++) {
+                    path = fs.getPath(args[i]);
+                    System.out.println("-------(1)---------");
+                    System.out.println(
+                        Attributes.readBasicFileAttributes(path).toString());
+                    System.out.println("-------(2)---------");
+                    Map<String, ?> map = path.readAttributes("zip:*");
+                    for (Map.Entry<String, ?> e : map.entrySet()) {
+                        System.out.printf("    %s : %s%n", e.getKey(), e.getValue());
+                    }
+                    System.out.println("-------(3)---------");
+                    map = path.readAttributes("size,lastModifiedTime,isDirectory");
+                    for (Map.Entry<String, ?> e : map.entrySet()) {
+                        System.out.printf("    %s : %s%n", e.getKey(), e.getValue());
+                    }
+                }
+                break;
+            }
+        } catch (Exception x) {
+            x.printStackTrace();
+        } finally {
+            if (fs != null)
+                fs.close();
+        }
+    }
+
+    private static byte[] getBytes(String name) {
+        return name.getBytes();
+    }
+
+    private static String getString(byte[] name) {
+        return new String(name);
+    }
+
+    private static void walk(Path path) throws IOException
+    {
+        Files.walkFileTree(
+            path,
+            new SimpleFileVisitor<Path>() {
+                private int indent = 0;
+                private void indent() {
+                    int n = 0;
+                    while (n++ < indent)
+                        System.out.printf(" ");
+                }
+
+                @Override
+                public FileVisitResult visitFile(Path file,
+                                                 BasicFileAttributes attrs)
+                {
+                    indent();
+                    System.out.printf("%s%n", file.getName().toString());
+                    return FileVisitResult.CONTINUE;
+                }
+
+                @Override
+                public FileVisitResult preVisitDirectory(Path dir,
+                                                         BasicFileAttributes attrs)
+                {
+                    indent();
+                    System.out.printf("[%s]%n", dir.toString());
+                    indent += 2;
+                    return FileVisitResult.CONTINUE;
+                }
+
+                @Override
+                public FileVisitResult postVisitDirectory(Path dir,
+                                                          IOException ioe)
+                {
+                    indent -= 2;
+                    return FileVisitResult.CONTINUE;
+                }
+        });
+    }
+
+    private static void update(FileSystem fs, String path) throws Throwable{
+        Path src = FileSystems.getDefault().getPath(path);
+        if (Boolean.TRUE.equals(src.getAttribute("isDirectory"))) {
+            DirectoryStream<Path> ds = src.newDirectoryStream();
+            for (Path child : ds)
+                update(fs, child.toString());
+            ds.close();
+        } else {
+            Path dst = fs.getPath(path);
+            Path parent = dst.getParent();
+            if (parent != null && parent.notExists())
+                mkdirs(parent);
+            src.copyTo(dst, REPLACE_EXISTING);
+        }
+    }
+
+    private static void extract(FileSystem fs, String path) throws Throwable{
+        Path src = fs.getPath(path);
+        if (Boolean.TRUE.equals(src.getAttribute("isDirectory"))) {
+            DirectoryStream<Path> ds = src.newDirectoryStream();
+            for (Path child : ds)
+                extract(fs, child.toString());
+            ds.close();
+        } else {
+            if (path.startsWith("/"))
+                path = path.substring(1);
+            Path dst = FileSystems.getDefault().getPath(path);
+            Path parent = dst.getParent();
+            if (parent.notExists())
+                mkdirs(parent);
+            src.copyTo(dst, REPLACE_EXISTING);
+        }
+    }
+
+    // use DirectoryStream
+    private static void z2zcopy(FileSystem src, FileSystem dst, String path)
+        throws IOException
+    {
+        Path srcPath = src.getPath(path);
+        Path dstPath = dst.getPath(path);
+
+        if (Boolean.TRUE.equals(srcPath.getAttribute("isDirectory"))) {
+            if (!dstPath.exists()) {
+                try {
+                    mkdirs(dstPath);
+                } catch (FileAlreadyExistsException x) {}
+            }
+            DirectoryStream<Path> ds = srcPath.newDirectoryStream();
+            for (Path child : ds) {
+                z2zcopy(src, dst,
+                        path + (path.endsWith("/")?"":"/") + child.getName());
+            }
+            ds.close();
+        } else {
+            //System.out.println("copying..." + path);
+            srcPath.copyTo(dstPath);
+        }
+    }
+
+    // use TreeWalk to move
+    private static void z2zmove(FileSystem src, FileSystem dst, String path)
+        throws IOException
+    {
+        final Path srcPath = src.getPath(path).toAbsolutePath();
+        final Path dstPath = dst.getPath(path).toAbsolutePath();
+
+        Files.walkFileTree(srcPath, new SimpleFileVisitor<Path>() {
+
+            @Override
+            public FileVisitResult visitFile(Path file,
+                                            BasicFileAttributes attrs)
+            {
+                Path dst = srcPath.relativize(file);
+                dst = dstPath.resolve(dst);
+                try {
+                    Path parent = dstPath.getParent();
+                    if (parent != null && parent.notExists())
+                        mkdirs(parent);
+                    file.moveTo(dst);
+                } catch (IOException x) {
+                    x.printStackTrace();
+                }
+                return FileVisitResult.CONTINUE;
+            }
+
+            @Override
+            public FileVisitResult preVisitDirectory(Path dir,
+                                                     BasicFileAttributes attrs)
+            {
+                Path dst = srcPath.relativize(dir);
+                dst = dstPath.resolve(dst);
+                try {
+
+                    if (dst.notExists())
+                        mkdirs(dst);
+                } catch (IOException x) {
+                    x.printStackTrace();
+                }
+                return FileVisitResult.CONTINUE;
+            }
+
+            @Override
+            public FileVisitResult postVisitDirectory(Path dir,
+                                                      IOException ioe)
+                throws IOException
+            {
+                try {
+                    dir.delete();
+                } catch (IOException x) {
+                    //x.printStackTrace();
+                }
+                return FileVisitResult.CONTINUE;
+            }
+        });
+
+    }
+
+    private static void mkdirs(Path path) throws IOException {
+        path = path.toAbsolutePath();
+        Path parent = path.getParent();
+        if (parent != null) {
+            if (parent.notExists())
+                mkdirs(parent);
+        }
+        path.createDirectory();
+    }
+
+    private static void rmdirs(Path path) throws IOException {
+        while (path != null && path.getNameCount() != 0) {
+            path.delete();
+            path = path.getParent();
+        }
+    }
+
+    private static void list(Path path, boolean verbose ) throws IOException {
+        if (verbose)
+            System.out.println(Attributes.readBasicFileAttributes(path).toString());
+        else
+            System.out.printf("  %s%n", path.toString());
+        if (path.notExists())
+            return;
+        if (Attributes.readBasicFileAttributes(path).isDirectory()) {
+            DirectoryStream<Path> ds = path.newDirectoryStream();
+            for (Path child : ds)
+                list(child, verbose);
+            ds.close();
+        }
+    }
+
+    // check the content of two paths are equal
+    private static void checkEqual(Path src, Path dst) throws IOException
+    {
+        //System.out.printf("checking <%s> vs <%s>...%n",
+        //                  src.toString(), dst.toString());
+
+        //streams
+        InputStream isSrc = src.newInputStream();
+        InputStream isDst = dst.newInputStream();
+        byte[] bufSrc = new byte[8192];
+        byte[] bufDst = new byte[8192];
+
+        try {
+            int nSrc = 0;
+            while ((nSrc = isSrc.read(bufSrc)) != -1) {
+                int nDst = 0;
+                while (nDst < nSrc) {
+                    int n = isDst.read(bufDst, nDst, nSrc - nDst);
+                    if (n == -1) {
+                        System.out.printf("checking <%s> vs <%s>...%n",
+                                          src.toString(), dst.toString());
+                        throw new RuntimeException("CHECK FAILED!");
+                    }
+                    nDst += n;
+                }
+                while (--nSrc >= 0) {
+                    if (bufSrc[nSrc] != bufDst[nSrc]) {
+                        System.out.printf("checking <%s> vs <%s>...%n",
+                                          src.toString(), dst.toString());
+                        throw new RuntimeException("CHECK FAILED!");
+                    }
+                    nSrc--;
+                }
+            }
+        } finally {
+            isSrc.close();
+            isDst.close();
+        }
+
+        // channels
+        SeekableByteChannel chSrc = src.newByteChannel();
+        SeekableByteChannel chDst = dst.newByteChannel();
+        if (chSrc.size() != chDst.size()) {
+            System.out.printf("src[%s].size=%d, dst[%s].size=%d%n",
+                              chSrc.toString(), chSrc.size(),
+                              chDst.toString(), chDst.size());
+            throw new RuntimeException("CHECK FAILED!");
+        }
+        ByteBuffer bbSrc = ByteBuffer.allocate(8192);
+        ByteBuffer bbDst = ByteBuffer.allocate(8192);
+
+        try {
+            int nSrc = 0;
+            while ((nSrc = chSrc.read(bbSrc)) != -1) {
+                int nDst = chDst.read(bbDst);
+                if (nSrc != nDst) {
+                    System.out.printf("checking <%s> vs <%s>...%n",
+                                      src.toString(), dst.toString());
+                    throw new RuntimeException("CHECK FAILED!");
+                }
+                while (--nSrc >= 0) {
+                    if (bbSrc.get(nSrc) != bbDst.get(nSrc)) {
+                        System.out.printf("checking <%s> vs <%s>...%n",
+                                          src.toString(), dst.toString());
+                        throw new RuntimeException("CHECK FAILED!");
+                    }
+                    nSrc--;
+                }
+                bbSrc.flip();
+                bbDst.flip();
+            }
+        } catch (IOException x) {
+            x.printStackTrace();
+        } finally {
+            chSrc.close();
+            chDst.close();
+        }
+    }
+
+    private static void fchCopy(Path src, Path dst) throws IOException
+    {
+        Set<OpenOption> read = new HashSet<>();
+        read.add(READ);
+        Set<OpenOption> openwrite = new HashSet<>();
+        openwrite.add(CREATE_NEW);
+        openwrite.add(WRITE);
+
+        FileChannel srcFc = src.getFileSystem()
+                               .provider()
+                               .newFileChannel(src, read);
+        FileChannel dstFc = dst.getFileSystem()
+                               .provider()
+                               .newFileChannel(dst, openwrite);
+
+        try {
+            ByteBuffer bb = ByteBuffer.allocate(8192);
+            while (srcFc.read(bb) >= 0) {
+                bb.flip();
+                dstFc.write(bb);
+                bb.clear();
+            }
+        } finally {
+            srcFc.close();
+            dstFc.close();
+        }
+    }
+
+    private static void chCopy(Path src, Path dst) throws IOException
+    {
+        Set<OpenOption> read = new HashSet<>();
+        read.add(READ);
+        Set<OpenOption> openwrite = new HashSet<>();
+        openwrite.add(CREATE_NEW);
+        openwrite.add(WRITE);
+
+        SeekableByteChannel srcCh = src.newByteChannel(read);
+        SeekableByteChannel dstCh = dst.newByteChannel(openwrite);
+
+        try {
+            ByteBuffer bb = ByteBuffer.allocate(8192);
+            while (srcCh.read(bb) >= 0) {
+                bb.flip();
+                dstCh.write(bb);
+                bb.clear();
+            }
+        } finally {
+            srcCh.close();
+            dstCh.close();
+        }
+    }
+
+    private static void streamCopy(Path src, Path dst) throws IOException
+    {
+        InputStream isSrc = src.newInputStream();
+        OutputStream osDst = dst.newOutputStream();
+        byte[] buf = new byte[8192];
+        try {
+            int n = 0;
+            while ((n = isSrc.read(buf)) != -1) {
+                osDst.write(buf, 0, n);
+            }
+        } finally {
+            isSrc.close();
+            osDst.close();
+        }
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/demo/nio/zipfs/META-INF/services/java.nio.file.spi.FileSystemProvider	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,3 @@
+com.sun.nio.zipfs.ZipFileSystemProvider
+com.sun.nio.zipfs.JarFileSystemProvider
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/demo/nio/zipfs/README.txt	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,29 @@
+ZipFileSystem is a file system provider that treats the contents of a zip or
+JAR file as a java.nio.file.FileSystem.
+
+To deploy the provider you must copy zipfs.jar into your extensions
+directory or else add <JDK_HOME>/demo/nio/ZipFileSystem/zipfs.jar
+to your class path.
+
+The factory methods defined by the java.nio.file.FileSystems class can be
+used to create a FileSystem, eg:
+
+   // use file type detection
+   Map<String,?> env = Collections.emptyMap();
+   Path jarfile = Path.get("foo.jar");
+   FileSystem fs = FileSystems.newFileSystem(jarfile, env);
+
+-or
+
+   // locate file system by URI
+   Map<String,?> env = Collections.emptyMap();
+   URI uri = URI.create("zip:///mydir/foo.jar");
+   FileSystem fs = FileSystems.newFileSystem(uri, env);
+
+Once a FileSystem is created then classes in the java.nio.file package
+can be used to access files in the zip/JAR file, eg:
+
+   Path mf = fs.getPath("/META-INF/MANIFEST.MF");
+   InputStream in = mf.newInputStream();
+
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/demo/nio/zipfs/com/sun/nio/zipfs/JarFileSystemProvider.java	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2007-2008 Sun Microsystems, Inc.  All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Sun Microsystems nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.sun.nio.zipfs;
+
+import java.nio.file.*;
+import java.nio.file.spi.*;
+import java.nio.file.attribute.*;
+import java.nio.file.spi.FileSystemProvider;
+
+import java.net.URI;
+import java.io.IOException;
+import java.net.URISyntaxException;
+import java.nio.channels.FileChannel;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+public class JarFileSystemProvider extends ZipFileSystemProvider
+{
+
+    @Override
+    public String getScheme() {
+        return "jar";
+    }
+
+    @Override
+    protected Path uriToPath(URI uri) {
+        String scheme = uri.getScheme();
+        if ((scheme == null) || !scheme.equalsIgnoreCase(getScheme())) {
+            throw new IllegalArgumentException("URI scheme is not '" + getScheme() + "'");
+        }
+        try {
+            String uristr = uri.toString();
+            int end = uristr.indexOf("!/");
+            uristr = uristr.substring(4, (end == -1) ? uristr.length() : end);
+            uri = new URI(uristr);
+            return Paths.get(new URI("file", uri.getHost(), uri.getPath(), null))
+                        .toAbsolutePath();
+        } catch (URISyntaxException e) {
+            throw new AssertionError(e); //never thrown
+        }
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipCoder.java	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,160 @@
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Oracle nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.sun.nio.zipfs;
+
+import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
+import java.nio.charset.Charset;
+import java.nio.charset.CharsetDecoder;
+import java.nio.charset.CharsetEncoder;
+import java.nio.charset.CoderResult;
+import java.nio.charset.CodingErrorAction;
+import java.util.Arrays;
+
+/**
+ * Utility class for zipfile name and comment decoding and encoding
+ *
+ * @author  Xueming Shen
+ */
+
+final class ZipCoder {
+
+    String toString(byte[] ba, int length) {
+        CharsetDecoder cd = decoder().reset();
+        int len = (int)(length * cd.maxCharsPerByte());
+        char[] ca = new char[len];
+        if (len == 0)
+            return new String(ca);
+        ByteBuffer bb = ByteBuffer.wrap(ba, 0, length);
+        CharBuffer cb = CharBuffer.wrap(ca);
+        CoderResult cr = cd.decode(bb, cb, true);
+        if (!cr.isUnderflow())
+            throw new IllegalArgumentException(cr.toString());
+        cr = cd.flush(cb);
+        if (!cr.isUnderflow())
+            throw new IllegalArgumentException(cr.toString());
+        return new String(ca, 0, cb.position());
+    }
+
+    String toString(byte[] ba) {
+        return toString(ba, ba.length);
+    }
+
+    byte[] getBytes(String s) {
+        CharsetEncoder ce = encoder().reset();
+        char[] ca = s.toCharArray();
+        int len = (int)(ca.length * ce.maxBytesPerChar());
+        byte[] ba = new byte[len];
+        if (len == 0)
+            return ba;
+        ByteBuffer bb = ByteBuffer.wrap(ba);
+        CharBuffer cb = CharBuffer.wrap(ca);
+        CoderResult cr = ce.encode(cb, bb, true);
+        if (!cr.isUnderflow())
+            throw new IllegalArgumentException(cr.toString());
+        cr = ce.flush(bb);
+        if (!cr.isUnderflow())
+            throw new IllegalArgumentException(cr.toString());
+        if (bb.position() == ba.length)  // defensive copy?
+            return ba;
+        else
+            return Arrays.copyOf(ba, bb.position());
+    }
+
+    // assume invoked only if "this" is not utf8
+    byte[] getBytesUTF8(String s) {
+        if (isutf8)
+            return getBytes(s);
+        if (utf8 == null)
+            utf8 = new ZipCoder(Charset.forName("UTF-8"));
+        return utf8.getBytes(s);
+    }
+
+    String toStringUTF8(byte[] ba, int len) {
+        if (isutf8)
+            return toString(ba, len);
+        if (utf8 == null)
+            utf8 = new ZipCoder(Charset.forName("UTF-8"));
+        return utf8.toString(ba, len);
+    }
+
+    boolean isUTF8() {
+        return isutf8;
+    }
+
+    private Charset cs;
+    private boolean isutf8;
+    private ZipCoder utf8;
+
+    private ZipCoder(Charset cs) {
+        this.cs = cs;
+        this.isutf8 = cs.name().equals("UTF-8");
+    }
+
+    static ZipCoder get(Charset charset) {
+        return new ZipCoder(charset);
+    }
+
+    static ZipCoder get(String csn) {
+        try {
+            return new ZipCoder(Charset.forName(csn));
+        } catch (Throwable t) {
+            t.printStackTrace();
+        }
+        return new ZipCoder(Charset.defaultCharset());
+    }
+
+    private final ThreadLocal<CharsetDecoder> decTL = new ThreadLocal<>();
+    private final ThreadLocal<CharsetEncoder> encTL = new ThreadLocal<>();
+
+    private CharsetDecoder decoder() {
+        CharsetDecoder dec = decTL.get();
+        if (dec == null) {
+            dec = cs.newDecoder()
+              .onMalformedInput(CodingErrorAction.REPORT)
+              .onUnmappableCharacter(CodingErrorAction.REPORT);
+            decTL.set(dec);
+        }
+        return dec;
+    }
+
+    private CharsetEncoder encoder() {
+        CharsetEncoder enc = encTL.get();
+        if (enc == null) {
+            enc = cs.newEncoder()
+              .onMalformedInput(CodingErrorAction.REPORT)
+              .onUnmappableCharacter(CodingErrorAction.REPORT);
+            encTL.set(enc);
+        }
+        return enc;
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipConstants.java	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,261 @@
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Oracle nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.sun.nio.zipfs;
+
+import java.nio.ByteBuffer;
+
+/**
+ *
+ * @author Xueming Shen
+ */
+
+class ZipConstants {
+    /*
+     * Compression methods
+     */
+    static final int METHOD_STORED     = 0;
+    static final int METHOD_DEFLATED   = 8;
+    static final int METHOD_DEFLATED64 = 9;
+    static final int METHOD_BZIP2      = 12;
+    static final int METHOD_LZMA       = 14;
+    static final int METHOD_LZ77       = 19;
+
+    /*
+     * General purpose big flag
+     */
+    static final int FLAG_ENCRYPTED  = 0x01;
+    static final int FLAG_DATADESCR  = 0x08;    // crc, size and csize in dd
+    static final int FLAG_EFS        = 0x800;   // If this bit is set the filename and
+                                                // comment fields for this file must be
+                                                // encoded using UTF-8.
+    /*
+     * Header signatures
+     */
+    static long LOCSIG = 0x04034b50L;   // "PK\003\004"
+    static long EXTSIG = 0x08074b50L;   // "PK\007\008"
+    static long CENSIG = 0x02014b50L;   // "PK\001\002"
+    static long ENDSIG = 0x06054b50L;   // "PK\005\006"
+
+    /*
+     * Header sizes in bytes (including signatures)
+     */
+    static final int LOCHDR = 30;       // LOC header size
+    static final int EXTHDR = 16;       // EXT header size
+    static final int CENHDR = 46;       // CEN header size
+    static final int ENDHDR = 22;       // END header size
+
+    /*
+     * Local file (LOC) header field offsets
+     */
+    static final int LOCVER = 4;        // version needed to extract
+    static final int LOCFLG = 6;        // general purpose bit flag
+    static final int LOCHOW = 8;        // compression method
+    static final int LOCTIM = 10;       // modification time
+    static final int LOCCRC = 14;       // uncompressed file crc-32 value
+    static final int LOCSIZ = 18;       // compressed size
+    static final int LOCLEN = 22;       // uncompressed size
+    static final int LOCNAM = 26;       // filename length
+    static final int LOCEXT = 28;       // extra field length
+
+    /*
+     * Extra local (EXT) header field offsets
+     */
+    static final int EXTCRC = 4;        // uncompressed file crc-32 value
+    static final int EXTSIZ = 8;        // compressed size
+    static final int EXTLEN = 12;       // uncompressed size
+
+    /*
+     * Central directory (CEN) header field offsets
+     */
+    static final int CENVEM = 4;        // version made by
+    static final int CENVER = 6;        // version needed to extract
+    static final int CENFLG = 8;        // encrypt, decrypt flags
+    static final int CENHOW = 10;       // compression method
+    static final int CENTIM = 12;       // modification time
+    static final int CENCRC = 16;       // uncompressed file crc-32 value
+    static final int CENSIZ = 20;       // compressed size
+    static final int CENLEN = 24;       // uncompressed size
+    static final int CENNAM = 28;       // filename length
+    static final int CENEXT = 30;       // extra field length
+    static final int CENCOM = 32;       // comment length
+    static final int CENDSK = 34;       // disk number start
+    static final int CENATT = 36;       // internal file attributes
+    static final int CENATX = 38;       // external file attributes
+    static final int CENOFF = 42;       // LOC header offset
+
+    /*
+     * End of central directory (END) header field offsets
+     */
+    static final int ENDSUB = 8;        // number of entries on this disk
+    static final int ENDTOT = 10;       // total number of entries
+    static final int ENDSIZ = 12;       // central directory size in bytes
+    static final int ENDOFF = 16;       // offset of first CEN header
+    static final int ENDCOM = 20;       // zip file comment length
+
+    /*
+     * ZIP64 constants
+     */
+    static final long ZIP64_ENDSIG = 0x06064b50L;  // "PK\006\006"
+    static final long ZIP64_LOCSIG = 0x07064b50L;  // "PK\006\007"
+    static final int  ZIP64_ENDHDR = 56;           // ZIP64 end header size
+    static final int  ZIP64_LOCHDR = 20;           // ZIP64 end loc header size
+    static final int  ZIP64_EXTHDR = 24;           // EXT header size
+    static final int  ZIP64_EXTID  = 0x0001;       // Extra field Zip64 header ID
+
+    static final int  ZIP64_MINVAL32 = 0xFFFF;
+    static final long ZIP64_MINVAL = 0xFFFFFFFFL;
+
+    /*
+     * Zip64 End of central directory (END) header field offsets
+     */
+    static final int  ZIP64_ENDLEN = 4;       // size of zip64 end of central dir
+    static final int  ZIP64_ENDVEM = 12;      // version made by
+    static final int  ZIP64_ENDVER = 14;      // version needed to extract
+    static final int  ZIP64_ENDNMD = 16;      // number of this disk
+    static final int  ZIP64_ENDDSK = 20;      // disk number of start
+    static final int  ZIP64_ENDTOD = 24;      // total number of entries on this disk
+    static final int  ZIP64_ENDTOT = 32;      // total number of entries
+    static final int  ZIP64_ENDSIZ = 40;      // central directory size in bytes
+    static final int  ZIP64_ENDOFF = 48;      // offset of first CEN header
+    static final int  ZIP64_ENDEXT = 56;      // zip64 extensible data sector
+
+    /*
+     * Zip64 End of central directory locator field offsets
+     */
+    static final int  ZIP64_LOCDSK = 4;       // disk number start
+    static final int  ZIP64_LOCOFF = 8;       // offset of zip64 end
+    static final int  ZIP64_LOCTOT = 16;      // total number of disks
+
+    /*
+     * Zip64 Extra local (EXT) header field offsets
+     */
+    static final int  ZIP64_EXTCRC = 4;       // uncompressed file crc-32 value
+    static final int  ZIP64_EXTSIZ = 8;       // compressed size, 8-byte
+    static final int  ZIP64_EXTLEN = 16;      // uncompressed size, 8-byte
+
+    /*
+     * Extra field header ID
+     */
+    static final int  EXTID_ZIP64 = 0x0001;      // ZIP64
+    static final int  EXTID_NTFS  = 0x000a;      // NTFS
+    static final int  EXTID_UNIX  = 0x000d;      // UNIX
+
+
+    /*
+     * fields access methods
+     */
+    ///////////////////////////////////////////////////////
+    static final int CH(byte[] b, int n) {
+       return b[n] & 0xff;
+    }
+
+    static final int SH(byte[] b, int n) {
+        return (b[n] & 0xff) | ((b[n + 1] & 0xff) << 8);
+    }
+
+    static final long LG(byte[] b, int n) {
+        return ((SH(b, n)) | (SH(b, n + 2) << 16)) & 0xffffffffL;
+    }
+
+    static final long LL(byte[] b, int n) {
+        return (LG(b, n)) | (LG(b, n + 4) << 32);
+    }
+
+    static final long GETSIG(byte[] b) {
+        return LG(b, 0);
+    }
+
+    // local file (LOC) header fields
+    static final long LOCSIG(byte[] b) { return LG(b, 0); } // signature
+    static final int  LOCVER(byte[] b) { return SH(b, 4); } // version needed to extract
+    static final int  LOCFLG(byte[] b) { return SH(b, 6); } // general purpose bit flags
+    static final int  LOCHOW(byte[] b) { return SH(b, 8); } // compression method
+    static final long LOCTIM(byte[] b) { return LG(b, 10);} // modification time
+    static final long LOCCRC(byte[] b) { return LG(b, 14);} // crc of uncompressed data
+    static final long LOCSIZ(byte[] b) { return LG(b, 18);} // compressed data size
+    static final long LOCLEN(byte[] b) { return LG(b, 22);} // uncompressed data size
+    static final int  LOCNAM(byte[] b) { return SH(b, 26);} // filename length
+    static final int  LOCEXT(byte[] b) { return SH(b, 28);} // extra field length
+
+    // extra local (EXT) header fields
+    static final long EXTCRC(byte[] b) { return LG(b, 4);}  // crc of uncompressed data
+    static final long EXTSIZ(byte[] b) { return LG(b, 8);}  // compressed size
+    static final long EXTLEN(byte[] b) { return LG(b, 12);} // uncompressed size
+
+    // end of central directory header (END) fields
+    static final int  ENDSUB(byte[] b) { return SH(b, 8); }  // number of entries on this disk
+    static final int  ENDTOT(byte[] b) { return SH(b, 10);}  // total number of entries
+    static final long ENDSIZ(byte[] b) { return LG(b, 12);}  // central directory size
+    static final long ENDOFF(byte[] b) { return LG(b, 16);}  // central directory offset
+    static final int  ENDCOM(byte[] b) { return SH(b, 20);}  // size of zip file comment
+    static final int  ENDCOM(byte[] b, int off) { return SH(b, off + 20);}
+
+    // zip64 end of central directory recoder fields
+    static final long ZIP64_ENDTOD(byte[] b) { return LL(b, 24);}  // total number of entries on disk
+    static final long ZIP64_ENDTOT(byte[] b) { return LL(b, 32);}  // total number of entries
+    static final long ZIP64_ENDSIZ(byte[] b) { return LL(b, 40);}  // central directory size
+    static final long ZIP64_ENDOFF(byte[] b) { return LL(b, 48);}  // central directory offset
+    static final long ZIP64_LOCOFF(byte[] b) { return LL(b, 8);}   // zip64 end offset
+
+    //////////////////////////////////////////
+    static final int CH(ByteBuffer b, int pos) {
+       return b.get(pos) & 0xff;
+    }
+    static final int SH(ByteBuffer b, int pos) {
+        return b.getShort(pos) & 0xffff;
+    }
+    static final long LG(ByteBuffer b, int pos) {
+        return b.getInt(pos) & 0xffffffffL;
+    }
+
+    // central directory header (END) fields
+    static final long CENSIG(ByteBuffer b, int pos) { return LG(b, pos + 0); }
+    static final int  CENVEM(ByteBuffer b, int pos) { return SH(b, pos + 4); }
+    static final int  CENVER(ByteBuffer b, int pos) { return SH(b, pos + 6); }
+    static final int  CENFLG(ByteBuffer b, int pos) { return SH(b, pos + 8); }
+    static final int  CENHOW(ByteBuffer b, int pos) { return SH(b, pos + 10);}
+    static final long CENTIM(ByteBuffer b, int pos) { return LG(b, pos + 12);}
+    static final long CENCRC(ByteBuffer b, int pos) { return LG(b, pos + 16);}
+    static final long CENSIZ(ByteBuffer b, int pos) { return LG(b, pos + 20);}
+    static final long CENLEN(ByteBuffer b, int pos) { return LG(b, pos + 24);}
+    static final int  CENNAM(ByteBuffer b, int pos) { return SH(b, pos + 28);}
+    static final int  CENEXT(ByteBuffer b, int pos) { return SH(b, pos + 30);}
+    static final int  CENCOM(ByteBuffer b, int pos) { return SH(b, pos + 32);}
+    static final int  CENDSK(ByteBuffer b, int pos) { return SH(b, pos + 34);}
+    static final int  CENATT(ByteBuffer b, int pos) { return SH(b, pos + 36);}
+    static final long CENATX(ByteBuffer b, int pos) { return LG(b, pos + 38);}
+    static final long CENOFF(ByteBuffer b, int pos) { return LG(b, pos + 42);}
+
+    /* The END header is followed by a variable length comment of size < 64k. */
+    static final long END_MAXLEN = 0xFFFF + ENDHDR;
+    static final int READBLOCKSZ = 128;
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipDirectoryStream.java	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Oracle nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.sun.nio.zipfs;
+
+import java.nio.file.DirectoryStream;
+import java.nio.file.ClosedDirectoryStreamException;
+import java.nio.file.NotDirectoryException;
+import java.nio.file.Path;
+import java.util.Iterator;
+import java.util.NoSuchElementException;
+import java.io.IOException;
+import static com.sun.nio.zipfs.ZipUtils.*;
+
+/**
+ *
+ * @author  Xueming Shen, Rajendra Gutupalli, Jaya Hangal
+ */
+
+public class ZipDirectoryStream implements DirectoryStream<Path> {
+
+    private final ZipFileSystem zipfs;
+    private final byte[] path;
+    private final DirectoryStream.Filter<? super Path> filter;
+    private volatile boolean isClosed;
+    private volatile Iterator<Path> itr;
+
+    ZipDirectoryStream(ZipPath zipPath,
+                       DirectoryStream.Filter<? super java.nio.file.Path> filter)
+        throws IOException
+    {
+        this.zipfs = zipPath.getFileSystem();
+        this.path = zipPath.getResolvedPath();
+        this.filter = filter;
+        // sanity check
+        if (!zipfs.isDirectory(path))
+            throw new NotDirectoryException(zipPath.toString());
+    }
+
+    @Override
+    public synchronized Iterator<Path> iterator() {
+        if (isClosed)
+            throw new ClosedDirectoryStreamException();
+        if (itr != null)
+            throw new IllegalStateException("Iterator has already been returned");
+
+        try {
+            itr = zipfs.iteratorOf(path, filter);
+        } catch (IOException e) {
+            throw new IllegalStateException(e);
+        }
+        return new Iterator<Path>() {
+            private Path next;
+            @Override
+            public boolean hasNext() {
+                if (isClosed)
+                    return false;
+                return itr.hasNext();
+            }
+
+            @Override
+            public synchronized Path next() {
+                if (isClosed)
+                    throw new NoSuchElementException();
+                return itr.next();
+            }
+
+            @Override
+            public void remove() {
+                throw new UnsupportedOperationException();
+            }
+        };
+    }
+
+    @Override
+    public synchronized void close() throws IOException {
+        isClosed = true;
+    }
+
+
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipFileAttributeView.java	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,185 @@
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Oracle nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+package com.sun.nio.zipfs;
+
+import java.nio.file.ReadOnlyFileSystemException;
+import java.nio.file.attribute.BasicFileAttributeView;
+import java.nio.file.attribute.FileAttributeView;
+import java.nio.file.attribute.FileTime;
+import java.io.IOException;
+import java.util.LinkedHashMap;
+
+/*
+ * @author  Xueming Shen, Rajendra Gutupalli, Jaya Hangal
+ */
+
+public class ZipFileAttributeView implements BasicFileAttributeView
+{
+    private static enum AttrID {
+        size,
+        creationTime,
+        lastAccessTime,
+        lastModifiedTime,
+        isDirectory,
+        isRegularFile,
+        isSymbolicLink,
+        isOther,
+        fileKey,
+        compressedSize,
+        crc,
+        method
+    };
+
+    private final ZipPath path;
+    private final boolean isZipView;
+
+    private ZipFileAttributeView(ZipPath path, boolean isZipView) {
+        this.path = path;
+        this.isZipView = isZipView;
+    }
+
+    static <V extends FileAttributeView> V get(ZipPath path, Class<V> type) {
+        if (type == null)
+            throw new NullPointerException();
+        if (type == BasicFileAttributeView.class)
+            return (V)new ZipFileAttributeView(path, false);
+        if (type == ZipFileAttributeView.class)
+            return (V)new ZipFileAttributeView(path, true);
+        return null;
+    }
+
+    static ZipFileAttributeView get(ZipPath path, String type) {
+        if (type == null)
+            throw new NullPointerException();
+        if (type.equals("basic"))
+            return new ZipFileAttributeView(path, false);
+        if (type.equals("zip"))
+            return new ZipFileAttributeView(path, true);
+        return null;
+    }
+
+    @Override
+    public String name() {
+        return isZipView ? "zip" : "basic";
+    }
+
+    public ZipFileAttributes readAttributes() throws IOException
+    {
+        return path.getAttributes();
+    }
+
+    @Override
+    public void setTimes(FileTime lastModifiedTime,
+                         FileTime lastAccessTime,
+                         FileTime createTime)
+        throws IOException
+    {
+        path.setTimes(lastModifiedTime, lastAccessTime, createTime);
+    }
+
+    void setAttribute(String attribute, Object value)
+        throws IOException
+    {
+        try {
+            if (AttrID.valueOf(attribute) == AttrID.lastModifiedTime)
+                setTimes ((FileTime)value, null, null);
+            return;
+        } catch (IllegalArgumentException x) {}
+        throw new UnsupportedOperationException("'" + attribute +
+            "' is unknown or read-only attribute");
+    }
+
+    public Object getAttribute(String attribute, boolean domap)
+        throws IOException
+    {
+        ZipFileAttributes zfas = readAttributes();
+        if (!domap) {
+            try {
+                return attribute(AttrID.valueOf(attribute), zfas);
+            } catch (IllegalArgumentException x) {}
+            return null;
+        }
+        LinkedHashMap<String, Object> map = new LinkedHashMap<>();
+        if ("*".equals(attribute)) {
+            for (AttrID id : AttrID.values()) {
+                try {
+                    map.put(id.name(), attribute(id, zfas));
+                } catch (IllegalArgumentException x) {}
+            }
+        } else {
+            String[] as = attribute.split(",");
+            for (String a : as) {
+                try {
+                    map.put(a, attribute(AttrID.valueOf(a), zfas));
+                } catch (IllegalArgumentException x) {}
+            }
+        }
+        return map;
+    }
+
+    Object attribute(AttrID id, ZipFileAttributes zfas) {
+        switch (id) {
+        case size:
+            return zfas.size();
+        case creationTime:
+            return zfas.creationTime();
+        case lastAccessTime:
+            return zfas.lastAccessTime();
+        case lastModifiedTime:
+            return zfas.lastModifiedTime();
+        case isDirectory:
+            return zfas.isDirectory();
+        case isRegularFile:
+            return zfas.isRegularFile();
+        case isSymbolicLink:
+            return zfas.isSymbolicLink();
+        case isOther:
+            return zfas.isOther();
+        case fileKey:
+            return zfas.fileKey();
+        case compressedSize:
+            if (isZipView)
+                return zfas.compressedSize();
+            break;
+        case crc:
+            if (isZipView)
+                return zfas.crc();
+            break;
+        case method:
+            if (isZipView)
+                return zfas.method();
+            break;
+        }
+        return null;
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipFileAttributes.java	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,156 @@
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Oracle nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+package com.sun.nio.zipfs;
+
+import java.nio.file.attribute.BasicFileAttributes;
+import java.nio.file.attribute.FileTime;
+import java.util.Arrays;
+import java.util.Formatter;
+import static com.sun.nio.zipfs.ZipUtils.*;
+
+/**
+ *
+ * @author  Xueming Shen, Rajendra Gutupalli,Jaya Hangal
+ */
+
+public class ZipFileAttributes implements BasicFileAttributes
+
+{
+    private final ZipFileSystem.Entry e;
+
+    ZipFileAttributes(ZipFileSystem.Entry e) {
+        this.e = e;
+    }
+
+    ///////// basic attributes ///////////
+    @Override
+    public FileTime creationTime() {
+        if (e.ctime != -1)
+            return FileTime.fromMillis(dosToJavaTime(e.ctime));
+        return null;
+    }
+
+    @Override
+    public boolean isDirectory() {
+        return e.isDir();
+    }
+
+    @Override
+    public boolean isOther() {
+        return false;
+    }
+
+    @Override
+    public boolean isRegularFile() {
+        return !e.isDir();
+    }
+
+    @Override
+    public FileTime lastAccessTime() {
+        if (e.atime != -1)
+            return FileTime.fromMillis(dosToJavaTime(e.atime));
+        return null;
+    }
+
+    @Override
+    public FileTime lastModifiedTime() {
+        return FileTime.fromMillis(dosToJavaTime(e.mtime));
+    }
+
+    @Override
+    public long size() {
+        return e.size;
+    }
+
+    @Override
+    public boolean isSymbolicLink() {
+        return false;
+    }
+
+    @Override
+    public Object fileKey() {
+        return null;
+    }
+
+    ///////// zip entry attributes ///////////
+    public byte[] name() {
+        return Arrays.copyOf(e.name, e.name.length);
+    }
+
+    public long compressedSize() {
+        return e.csize;
+    }
+
+    public long crc() {
+        return e.crc;
+    }
+
+    public int method() {
+        return e.method;
+    }
+
+    public byte[] extra() {
+        if (e.extra != null)
+            return Arrays.copyOf(e.extra, e.extra.length);
+        return null;
+    }
+
+    public byte[] comment() {
+        if (e.comment != null)
+            return Arrays.copyOf(e.comment, e.comment.length);
+        return null;
+    }
+
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        Formatter fm = new Formatter(sb);
+        fm.format("[/%s]%n", new String(e.name));  // TBD encoding
+        fm.format("    creationTime    : %s%n", creationTime());
+        if (lastAccessTime() != null)
+            fm.format("    lastAccessTime  : %tc%n", lastAccessTime().toMillis());
+        else
+            fm.format("    lastAccessTime  : null%n");
+        fm.format("    lastModifiedTime: %tc%n", lastModifiedTime().toMillis());
+        fm.format("    isRegularFile   : %b%n", isRegularFile());
+        fm.format("    isDirectory     : %b%n", isDirectory());
+        fm.format("    isSymbolicLink  : %b%n", isSymbolicLink());
+        fm.format("    isOther         : %b%n", isOther());
+        fm.format("    fileKey         : %s%n", fileKey());
+        fm.format("    size            : %d%n", size());
+        fm.format("    compressedSize  : %d%n", compressedSize());
+        fm.format("    crc             : %x%n", crc());
+        fm.format("    method          : %d%n", method());
+        fm.close();
+        return sb.toString();
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipFileStore.java	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,157 @@
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Oracle nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.sun.nio.zipfs;
+
+import java.io.IOException;
+import java.nio.file.FileStore;
+import java.nio.file.FileSystems;
+import java.nio.file.Path;
+import java.nio.file.attribute.FileAttributeView;
+import java.nio.file.attribute.FileStoreAttributeView;
+import java.nio.file.attribute.FileStoreSpaceAttributeView;
+import java.nio.file.attribute.FileStoreSpaceAttributes;
+import java.nio.file.attribute.Attributes;
+import java.nio.file.attribute.BasicFileAttributeView;
+import java.util.Formatter;
+
+/*
+ *
+ * @author  Xueming Shen, Rajendra Gutupalli, Jaya Hangal
+ */
+
+public class ZipFileStore extends FileStore {
+
+    private final ZipFileSystem zfs;
+
+    ZipFileStore(ZipPath zpath) {
+        this.zfs = (ZipFileSystem)zpath.getFileSystem();
+    }
+
+    @Override
+    public String name() {
+        return zfs.toString() + "/";
+    }
+
+    @Override
+    public String type() {
+        return "zipfs";
+    }
+
+    @Override
+    public boolean isReadOnly() {
+        return zfs.isReadOnly();
+    }
+
+    @Override
+    public boolean supportsFileAttributeView(Class<? extends FileAttributeView> type) {
+        return (type == BasicFileAttributeView.class ||
+                type == ZipFileAttributeView.class);
+    }
+
+    @Override
+    public boolean supportsFileAttributeView(String name) {
+        return name.equals("basic") || name.equals("zip");
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public <V extends FileStoreAttributeView> V getFileStoreAttributeView(Class<V> type) {
+        if (type == null)
+            throw new NullPointerException();
+        if (type == FileStoreSpaceAttributeView.class)
+            return (V) new ZipFileStoreAttributeView(this);
+        return null;
+    }
+
+    @Override
+    public Object getAttribute(String attribute) throws IOException {
+         if (attribute.equals("space:totalSpace"))
+               return new ZipFileStoreAttributeView(this).readAttributes().totalSpace();
+         if (attribute.equals("space:usableSpace"))
+               return new ZipFileStoreAttributeView(this).readAttributes().usableSpace();
+         if (attribute.equals("space:unallocatedSpace"))
+               return new ZipFileStoreAttributeView(this).readAttributes().unallocatedSpace();
+         throw new UnsupportedOperationException("does not support the given attribute");
+    }
+
+    private static class ZipFileStoreAttributeView implements FileStoreSpaceAttributeView {
+
+        private final ZipFileStore fileStore;
+
+        public ZipFileStoreAttributeView(ZipFileStore fileStore) {
+            this.fileStore = fileStore;
+        }
+
+        @Override
+        public String name() {
+            return "space";
+        }
+
+        @Override
+        public FileStoreSpaceAttributes readAttributes() throws IOException {
+            final String file = fileStore.name();
+            Path path = FileSystems.getDefault().getPath(file);
+            final long size = Attributes.readBasicFileAttributes(path).size();
+            final FileStore fstore = path.getFileStore();
+            final FileStoreSpaceAttributes fstoreAttrs =
+                Attributes.readFileStoreSpaceAttributes(fstore);
+            return new FileStoreSpaceAttributes() {
+                public long totalSpace() {
+                    return size;
+                }
+
+                public long usableSpace() {
+                    if (!fstore.isReadOnly())
+                        return fstoreAttrs.usableSpace();
+                    return 0;
+                }
+
+                public long unallocatedSpace() {
+                    if (!fstore.isReadOnly())
+                        return fstoreAttrs.unallocatedSpace();
+                    return 0;
+                }
+
+                public String toString() {
+                    StringBuilder sb = new StringBuilder();
+                    Formatter fm = new Formatter(sb);
+                    fm.format("FileStoreSpaceAttributes[%s]%n", file);
+                    fm.format("      totalSpace: %d%n", totalSpace());
+                    fm.format("     usableSpace: %d%n", usableSpace());
+                    fm.format("    unallocSpace: %d%n", unallocatedSpace());
+                    fm.close();
+                    return sb.toString();
+                }
+            };
+        }
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipFileSystem.java	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,2257 @@
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Oracle nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.sun.nio.zipfs;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.EOFException;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.MappedByteBuffer;
+import java.nio.channels.*;
+import java.nio.file.*;
+import java.nio.file.attribute.*;
+import java.nio.file.spi.*;
+import java.net.URI;
+import java.util.*;
+import java.util.regex.Pattern;
+import java.util.zip.CRC32;
+import java.util.zip.Inflater;
+import java.util.zip.Deflater;
+import java.util.zip.InflaterInputStream;
+import java.util.zip.DeflaterOutputStream;
+import java.util.zip.ZipException;
+import java.util.zip.ZipError;
+import static java.lang.Boolean.*;
+import static com.sun.nio.zipfs.ZipConstants.*;
+import static com.sun.nio.zipfs.ZipUtils.*;
+import static java.nio.file.StandardOpenOption.*;
+import static java.nio.file.StandardCopyOption.*;
+
+/**
+ * A FileSystem built on a zip file
+ *
+ * @author Xueming Shen
+ */
+
+public class ZipFileSystem extends FileSystem {
+
+    private final ZipFileSystemProvider provider;
+    private final ZipPath defaultdir;
+    private boolean readOnly = false;
+    private final Path zfpath;
+    private final ZipCoder zc;
+
+    private final Object lock = new Object();
+
+    // configurable by env map
+    private final String  defaultDir;    // default dir for the file system
+    private final String  nameEncoding;  // default encoding for name/comment
+    private final boolean buildDirTree;  // build a dir tree for directoryStream ops
+    private final boolean useTempFile;   // use a temp file for newOS, default
+                                         // is to use BAOS for better performance
+    private final boolean createNew;     // create a new zip if not exists
+
+    ZipFileSystem(ZipFileSystemProvider provider,
+                  Path zfpath,
+                  Map<String, ?> env)
+        throws IOException
+    {
+        // configurable env setup
+        this.buildDirTree = TRUE.equals(env.get("buildDirTree"));
+        this.useTempFile = TRUE.equals(env.get("useTempFile"));
+        this.createNew = TRUE.equals(env.get("createNew"));
+        this.nameEncoding = env.containsKey("nameEncoding") ?
+                            (String)env.get("nameEncoding") : "UTF-8";
+        this.defaultDir = env.containsKey("default.dir") ?
+                          (String)env.get("default.dir") : "/";
+        if (this.defaultDir.charAt(0) != '/')
+            throw new IllegalArgumentException("default dir should be absolute");
+
+        this.provider = provider;
+        this.zfpath = zfpath;
+        if (zfpath.notExists()) {
+            if (createNew) {
+                OutputStream os = zfpath.newOutputStream(CREATE_NEW, WRITE);
+                new END().write(os, 0);
+                os.close();
+            } else {
+                throw new FileSystemNotFoundException(zfpath.toString());
+            }
+        }
+        zfpath.checkAccess(AccessMode.READ); // sm and existence check
+        try {
+            zfpath.checkAccess(AccessMode.WRITE);
+        } catch (AccessDeniedException x) {
+            this.readOnly = true;
+        }
+        this.zc = ZipCoder.get(nameEncoding);
+        this.defaultdir = new ZipPath(this, getBytes(defaultDir));
+        initZipFile();
+    }
+
+    @Override
+    public FileSystemProvider provider() {
+        return provider;
+    }
+
+    @Override
+    public String getSeparator() {
+        return "/";
+    }
+
+    @Override
+    public boolean isOpen() {
+        return isOpen;
+    }
+
+    @Override
+    public boolean isReadOnly() {
+        return readOnly;
+    }
+
+    private void checkWritable() throws IOException {
+        if (readOnly)
+            throw new ReadOnlyFileSystemException();
+    }
+
+    @Override
+    public Iterable<Path> getRootDirectories() {
+        ArrayList<Path> pathArr = new ArrayList<>();
+        pathArr.add(new ZipPath(this, new byte[]{'/'}));
+        return pathArr;
+    }
+
+    ZipPath getDefaultDir() {  // package private
+        return defaultdir;
+    }
+
+    @Override
+    public ZipPath getPath(String path) {
+        if (path.length() == 0)
+            throw new InvalidPathException(path, "path should not be empty");
+        return new ZipPath(this, getBytes(path));
+    }
+
+    @Override
+    public UserPrincipalLookupService getUserPrincipalLookupService() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public WatchService newWatchService() {
+        throw new UnsupportedOperationException();
+    }
+
+    FileStore getFileStore(ZipPath path) {
+        return new ZipFileStore(path);
+    }
+
+    @Override
+    public Iterable<FileStore> getFileStores() {
+        ArrayList<FileStore> list = new ArrayList<FileStore>(1);
+        list.add(new ZipFileStore(new ZipPath(this, new byte[]{'/'})));
+        return list;
+    }
+
+    private static final Set<String> supportedFileAttributeViews =
+            Collections.unmodifiableSet(
+                new HashSet<String>(Arrays.asList("basic", "zip")));
+
+    @Override
+    public Set<String> supportedFileAttributeViews() {
+        return supportedFileAttributeViews;
+    }
+
+    @Override
+    public String toString() {
+        return zfpath.toString();
+    }
+
+    Path getZipFile() {
+        return zfpath;
+    }
+
+    private static final String GLOB_SYNTAX = "glob";
+    private static final String REGEX_SYNTAX = "regex";
+
+    @Override
+    public PathMatcher getPathMatcher(String syntaxAndInput) {
+        int pos = syntaxAndInput.indexOf(':');
+        if (pos <= 0 || pos == syntaxAndInput.length()) {
+            throw new IllegalArgumentException();
+        }
+        String syntax = syntaxAndInput.substring(0, pos);
+        String input = syntaxAndInput.substring(pos + 1);
+        String expr;
+        if (syntax.equals(GLOB_SYNTAX)) {
+            expr = toRegexPattern(input);
+        } else {
+            if (syntax.equals(REGEX_SYNTAX)) {
+                expr = input;
+            } else {
+                throw new UnsupportedOperationException("Syntax '" + syntax +
+                    "' not recognized");
+            }
+        }
+        // return matcher
+        final Pattern pattern = Pattern.compile(expr);
+        return new PathMatcher() {
+            @Override
+            public boolean matches(Path path) {
+                return pattern.matcher(path.toString()).matches();
+            }
+        };
+    }
+
+    @Override
+    public void close() throws IOException {
+        synchronized (lock) {
+            if (!isOpen)
+                return;
+            isOpen = false;
+            if (!streams.isEmpty()) {
+                synchronized(streams) {
+                    for (InputStream is: streams)
+                    is.close();
+                }
+            }
+            sync();
+            ch.close();
+        }
+        synchronized (inflaters) {
+            for (Inflater inf : inflaters)
+                inf.end();
+        }
+        synchronized (deflaters) {
+            for (Deflater def : deflaters)
+                def.end();
+        }
+        for (Path p: tmppaths) {
+            try {
+                p.deleteIfExists();
+            } catch (IOException x) {
+                x.printStackTrace();
+            }
+        }
+        provider.removeFileSystem(zfpath);
+    }
+
+    ZipFileAttributes[] getAllAttributes() throws IOException {
+        ensureOpen();
+        int n = inodes.size();
+        ZipFileAttributes[] zes = new ZipFileAttributes[n];
+        Iterator<IndexNode> itr = inodes.values().iterator();
+        int i = 0;
+        while(itr.hasNext()) {
+            zes[i++] = new ZipFileAttributes(Entry.readCEN(cen, itr.next().pos));
+        }
+        return zes;
+    }
+
+    EntryName[] getEntryNames() throws IOException {
+        ensureOpen();
+        return inodes.keySet().toArray(new EntryName[0]);
+    }
+
+    ZipFileAttributes getFileAttributes(byte[] path)
+        throws IOException
+    {
+        synchronized (lock) {
+            Entry e = getEntry0(path);
+            if (e == null) {
+                if (path.length == 0) {
+                    e = new Entry(new byte[0]);  // root
+                } else if (buildDirTree) {
+                    IndexNode inode = getDirs().get(new EntryName(path));
+                    if (inode == null)
+                        return null;
+                    e = new Entry(inode.name);
+                } else {
+                    return null;
+                }
+                e.method = METHOD_STORED;        // STORED for dir
+                BasicFileAttributes bfas = Attributes.readBasicFileAttributes(zfpath);
+                if (bfas.lastModifiedTime() != null)
+                    e.mtime = javaToDosTime(bfas.lastModifiedTime().toMillis());
+                if (bfas.lastAccessTime() != null)
+                    e.atime = javaToDosTime(bfas.lastAccessTime().toMillis());
+                if (bfas.creationTime() != null)
+                    e.ctime = javaToDosTime(bfas.creationTime().toMillis());
+            }
+            return new ZipFileAttributes(e);
+        }
+    }
+
+    void setTimes(byte[] path, FileTime mtime, FileTime atime, FileTime ctime)
+        throws IOException
+    {
+        checkWritable();
+        synchronized (lock) {
+            Entry e = getEntry0(path);    // ensureOpen checked
+            if (e == null)
+                throw new NoSuchFileException(getString(path));
+            if (e.type == Entry.CEN)
+                e.type = Entry.COPY;      // copy e
+            if (mtime != null)
+                e.mtime = javaToDosTime(mtime.toMillis());
+            if (atime != null)
+                e.atime = javaToDosTime(atime.toMillis());
+            if (ctime != null)
+                e.ctime = javaToDosTime(ctime.toMillis());
+            update(e);
+        }
+    }
+
+    boolean exists(byte[] path)
+        throws IOException
+    {
+        return getEntry0(path) != null;
+    }
+
+    boolean isDirectory(byte[] path)
+        throws IOException
+    {
+        synchronized (lock) {
+            if (buildDirTree) {
+                return getDirs().containsKey(new EntryName(path));
+            }
+            Entry e = getEntry0(path);
+            return (e != null && e.isDir()) || path.length == 0;
+        }
+    }
+
+    private ZipPath toZipPath(byte[] path) {
+        // make it absolute
+        byte[] p = new byte[path.length + 1];
+        p[0] = '/';
+        System.arraycopy(path, 0, p, 1, path.length);
+        return new ZipPath(this, p);
+    }
+
+    // returns the list of child paths of "path"
+    Iterator<Path> iteratorOf(byte[] path,
+                              DirectoryStream.Filter<? super Path> filter)
+        throws IOException
+    {
+        synchronized (lock) {
+            if (buildDirTree) {
+                IndexNode inode = getDirs().get(new EntryName(path));
+                if (inode == null)
+                    throw new NotDirectoryException(getString(path));
+                List<Path> list = new ArrayList<Path>();
+                IndexNode child = inode.child;
+                while (child != null) {
+                    ZipPath zp = toZipPath(child.name);
+                    if (filter == null || filter.accept(zp))
+                        list.add(zp);
+                    child = child.sibling;
+                }
+                return list.iterator();
+            }
+
+            if (!isDirectory(path))
+                throw new NotDirectoryException(getString(path));
+            List<Path> list = new ArrayList<Path>();
+            EntryName[] entries = getEntryNames();
+            path = toDirectoryPath(path);
+            for (EntryName en :entries) {
+                if (!isParentOf(path, en.name))  // is "path" the parent of "name"
+                    continue;
+                int off = path.length;
+                while (off < en.name.length) {
+                    if (en.name[off] == '/')
+                        break;
+                    off++;
+                }
+                if (off < (en.name.length - 1))
+                    continue;
+                ZipPath zp = toZipPath(en.name);
+                if (filter == null || filter.accept(zp))
+                    list.add(zp);
+            }
+            return list.iterator();
+        }
+    }
+
+    void createDirectory(byte[] dir, FileAttribute<?>... attrs)
+        throws IOException
+    {
+        checkWritable();
+        dir = toDirectoryPath(dir);
+        synchronized (lock) {
+            ensureOpen();
+            // pseudo root dir, or exiting dir
+            if (dir.length == 0 || exists(dir))
+                throw new FileAlreadyExistsException(getString(dir));
+            checkParents(dir);
+
+            Entry e = new Entry(dir, Entry.NEW);
+            e.method = METHOD_STORED;  // STORED for dir
+            update(e);
+        }
+    }
+
+    void copyFile(boolean deletesrc, byte[]src, byte[] dst, CopyOption... options)
+        throws IOException
+    {
+        checkWritable();
+        if (Arrays.equals(src, dst))
+            return;    // do nothing, src and dst are the same
+        synchronized (lock) {
+            Entry eSrc = getEntry0(src);  // ensureOpen checked
+            if (eSrc == null)
+                throw new NoSuchFileException(getString(src));
+            if (eSrc.isDir()) {    // spec says to create dst dir
+                createDirectory(dst);
+                return;
+            }
+            boolean hasReplace = false;
+            boolean hasCopyAttrs = false;
+            for (CopyOption opt : options) {
+                if (opt == REPLACE_EXISTING)
+                    hasReplace = true;
+                else if (opt == COPY_ATTRIBUTES)
+                    hasCopyAttrs = true;
+            }
+            Entry eDst = getEntry0(dst);
+            if (eDst != null) {
+                if (!hasReplace)
+                    throw new FileAlreadyExistsException(getString(dst));
+            } else {
+                checkParents(dst);
+            }
+            Entry u = new Entry(eSrc, Entry.COPY);    // copy eSrc entry
+            u.name = dst;                             // change name
+            // don't touch the "nlen and elen" here. writeLOC() always
+            // re-calculate from "name" and "extra" for the correct length,
+            // copyLOCEntry however needs the original lengths to skip the
+            // loc header.
+            // u.nlen = dst.length;
+            if (eSrc.type == Entry.NEW || eSrc.type == Entry.FILECH)
+            {
+                u.type = eSrc.type;    // make it the same type
+                if (!deletesrc) {      // if it's not "rename", just take the data
+                    if (eSrc.bytes != null)
+                        u.bytes = Arrays.copyOf(eSrc.bytes, eSrc.bytes.length);
+                    else if (eSrc.file != null) {
+                        u.file = getTempPathForEntry(null);
+                        eSrc.file.copyTo(u.file, REPLACE_EXISTING);
+                    }
+                }
+            }
+            if (!hasCopyAttrs)
+                u.mtime = u.atime= u.ctime = javaToDosTime(System.currentTimeMillis());
+            update(u);
+            if (deletesrc)
+                updateDelete(eSrc);
+        }
+    }
+
+    // Returns an output stream for writing the contents into the specified
+    // entry.
+    OutputStream newOutputStream(byte[] path, OpenOption... options)
+        throws IOException
+    {
+        checkWritable();
+        boolean hasCreateNew = false;
+        boolean hasCreate = false;
+        boolean hasAppend = false;
+        for (OpenOption opt: options) {
+            if (opt == READ)
+                throw new IllegalArgumentException("READ not allowed");
+            if (opt == CREATE_NEW)
+                hasCreateNew = true;
+            if (opt == CREATE)
+                hasCreate = true;
+            if (opt == APPEND)
+                hasAppend = true;
+        }
+        synchronized (lock) {
+            Entry e = getEntry0(path);
+            if (e != null) {
+                if (e.isDir() || hasCreateNew)
+                    throw new FileAlreadyExistsException(getString(path));
+                if (hasAppend) {
+                    InputStream is = getInputStream(e);
+                    OutputStream os = getOutputStream(new Entry(e, Entry.NEW));
+                    copyStream(is, os);
+                    is.close();
+                    return os;
+                 }
+                 return getOutputStream(new Entry(e, Entry.NEW));
+            } else {
+                if (!hasCreate && !hasCreateNew)
+                    throw new NoSuchFileException(getString(path));
+                checkParents(path);
+                return getOutputStream(new Entry(path, Entry.NEW));
+            }
+        }
+    }
+
+    // Returns an input stream for reading the contents of the specified
+    // file entry.
+    InputStream newInputStream(byte[] path) throws IOException {
+        synchronized (lock) {
+            Entry e = getEntry0(path);
+            if (e == null)
+                throw new NoSuchFileException(getString(path));
+            if (e.isDir())
+                throw new FileSystemException(getString(path), "is a directory", null);
+            return getInputStream(e);
+        }
+    }
+
+    private void checkOptions(Set<? extends OpenOption> options) {
+        // check for options of null type and option is an intance of StandardOpenOption
+        for (OpenOption option : options) {
+            if (option == null)
+                throw new NullPointerException();
+            if (!(option instanceof StandardOpenOption))
+                throw new IllegalArgumentException();
+        }
+    }
+
+    // Returns a Writable/ReadByteChannel for now. Might consdier to use
+    // newFileChannel() instead, which dump the entry data into a regular
+    // file on the default file system and create a FileChannel on top of
+    // it.
+    SeekableByteChannel newByteChannel(byte[] path,
+                                       Set<? extends OpenOption> options,
+                                       FileAttribute<?>... attrs)
+        throws IOException
+    {
+        checkOptions(options);
+        if (options.contains(StandardOpenOption.WRITE) ||
+            options.contains(StandardOpenOption.APPEND)) {
+            checkWritable();
+            final WritableByteChannel wbc = Channels.newChannel(newOutputStream(path,
+                                                options.toArray(new OpenOption[0])));
+            long leftover = 0;;
+            if (options.contains(StandardOpenOption.APPEND)) {
+                Entry e = getEntry0(path);
+                if (e != null && e.size >= 0)
+                    leftover = e.size;
+            }
+            final long offset = leftover;
+            return new SeekableByteChannel() {
+                long written = offset;
+                public boolean isOpen() {
+                    return wbc.isOpen();
+                }
+                public long position() throws IOException {
+                    return written;
+                }
+                public SeekableByteChannel position(long pos) throws IOException {
+                    throw new UnsupportedOperationException();
+                }
+                public int read(ByteBuffer dst) throws IOException {
+                    throw new UnsupportedOperationException();
+                }
+                public SeekableByteChannel truncate(long size) throws IOException {
+                    throw new UnsupportedOperationException();
+                }
+                public int write(ByteBuffer src) throws IOException {
+                    int n = wbc.write(src);
+                    written += n;
+                    return n;
+                }
+                public long size() throws IOException {
+                    return written;
+                }
+                public void close() throws IOException {
+                    wbc.close();
+                }
+            };
+        } else {
+            Entry e = getEntry0(path);
+            if (e == null || e.isDir())
+                throw new NoSuchFileException(getString(path));
+            final ReadableByteChannel rbc =
+                Channels.newChannel(getInputStream(e));
+            final long size = e.size;
+            return new SeekableByteChannel() {
+                long read = 0;
+                public boolean isOpen() {
+                    return rbc.isOpen();
+                }
+                public long position() throws IOException {
+                    return read;
+                }
+                public SeekableByteChannel position(long pos) throws IOException {
+                    throw new UnsupportedOperationException();
+                }
+                public int read(ByteBuffer dst) throws IOException {
+                    return rbc.read(dst);
+                }
+                public SeekableByteChannel truncate(long size) throws IOException {
+                    throw new NonWritableChannelException();
+                }
+                public int write (ByteBuffer src) throws IOException {
+                    throw new NonWritableChannelException();
+                }
+                public long size() throws IOException {
+                    return size;
+                }
+                public void close() throws IOException {
+                    rbc.close();
+                }
+            };
+        }
+    }
+
+    // Returns a FileChannel of the specified entry.
+    //
+    // This implementation creates a temporary file on the default file system,
+    // copy the entry data into it if the entry exists, and then create a
+    // FileChannel on top of it.
+    FileChannel newFileChannel(byte[] path,
+                               Set<? extends OpenOption> options,
+                               FileAttribute<?>... attrs)
+        throws IOException
+    {
+        checkOptions(options);
+        final  boolean forWrite = (options.contains(StandardOpenOption.WRITE) ||
+                                   options.contains(StandardOpenOption.APPEND));
+        Entry e = getEntry0(path);
+        if (forWrite) {
+            checkWritable();
+            if (e == null) {
+                if (!options.contains(StandardOpenOption.CREATE_NEW))
+                    throw new NoSuchFileException(getString(path));
+            } else {
+                if (options.contains(StandardOpenOption.CREATE_NEW))
+                    throw new FileAlreadyExistsException(getString(path));
+                if (e.isDir())
+                    throw new FileAlreadyExistsException("directory <"
+                        + getString(path) + "> exists");
+            }
+            options.remove(StandardOpenOption.CREATE_NEW); // for tmpfile
+        } else if (e == null || e.isDir()) {
+            throw new NoSuchFileException(getString(path));
+        }
+
+        final boolean isFCH = (e != null && e.type == Entry.FILECH);
+        final Path tmpfile = isFCH ? e.file : getTempPathForEntry(path);
+        final FileChannel fch = tmpfile.getFileSystem()
+                                       .provider()
+                                       .newFileChannel(tmpfile, options, attrs);
+        final Entry u = isFCH ? e : new Entry(path, tmpfile, Entry.FILECH);
+        if (forWrite) {
+            u.flag = FLAG_DATADESCR;
+            u.method = METHOD_DEFLATED;
+        }
+        // is there a better way to hook into the FileChannel's close method?
+        return new FileChannel() {
+            public int write(ByteBuffer src) throws IOException {
+                return fch.write(src);
+            }
+            public long write(ByteBuffer[] srcs, int offset, int length)
+                throws IOException
+            {
+                return fch.write(srcs, offset, length);
+            }
+            public long position() throws IOException {
+                return fch.position();
+            }
+            public FileChannel position(long newPosition)
+                throws IOException
+            {
+                fch.position(newPosition);
+                return this;
+            }
+            public long size() throws IOException {
+                return fch.size();
+            }
+            public FileChannel truncate(long size)
+                throws IOException
+            {
+                fch.truncate(size);
+                return this;
+            }
+            public void force(boolean metaData)
+                throws IOException
+            {
+                fch.force(metaData);
+            }
+            public long transferTo(long position, long count,
+                                   WritableByteChannel target)
+                throws IOException
+            {
+                return fch.transferTo(position, count, target);
+            }
+            public long transferFrom(ReadableByteChannel src,
+                                     long position, long count)
+                throws IOException
+            {
+                return fch.transferFrom(src, position, count);
+            }
+            public int read(ByteBuffer dst) throws IOException {
+                return fch.read(dst);
+            }
+            public int read(ByteBuffer dst, long position)
+                throws IOException
+            {
+                return fch.read(dst, position);
+            }
+            public long read(ByteBuffer[] dsts, int offset, int length)
+                throws IOException
+            {
+                return fch.read(dsts, offset, length);
+            }
+            public int write(ByteBuffer src, long position)
+                throws IOException
+            {
+               return fch.write(src, position);
+            }
+            public MappedByteBuffer map(MapMode mode,
+                                        long position, long size)
+                throws IOException
+            {
+                throw new UnsupportedOperationException();
+            }
+            public FileLock lock(long position, long size, boolean shared)
+                throws IOException
+            {
+                return fch.lock(position, size, shared);
+            }
+            public FileLock tryLock(long position, long size, boolean shared)
+                throws IOException
+            {
+                return fch.tryLock(position, size, shared);
+            }
+            protected void implCloseChannel() throws IOException {
+                fch.close();
+                if (forWrite) {
+                    u.mtime = javaToDosTime(System.currentTimeMillis());
+                    u.size = Attributes.readBasicFileAttributes(u.file).size();
+                    update(u);
+                } else {
+                    if (!isFCH)    // if this is a new fch for reading
+                        removeTempPathForEntry(tmpfile);
+                }
+            }
+        };
+    }
+
+    // the outstanding input streams that need to be closed
+    private Set<InputStream> streams =
+        Collections.synchronizedSet(new HashSet<InputStream>());
+
+    // the ex-channel and ex-path that need to close when their outstanding
+    // input streams are all closed by the obtainers.
+    private Set<ExChannelCloser> exChClosers = new HashSet<>();
+
+    private Set<Path> tmppaths = new HashSet<>();
+    private Path getTempPathForEntry(byte[] path) throws IOException {
+        Path tmpPath = createTempFileInSameDirectoryAs(zfpath);
+        tmppaths.add(tmpPath);
+
+        if (path != null) {
+            Entry e = getEntry0(path);
+            if (e != null) {
+                InputStream is = newInputStream(path);
+                OutputStream os = tmpPath.newOutputStream(WRITE);
+                try {
+                    copyStream(is, os);
+                } finally {
+                    is.close();
+                    os.close();
+                }
+            }
+        }
+        return tmpPath;
+    }
+
+    private void removeTempPathForEntry(Path path) throws IOException {
+        path.delete();
+        tmppaths.remove(path);
+    }
+
+    // check if all parents really exit. ZIP spec does not require
+    // the existence of any "parent directory".
+    private void checkParents(byte[] path) throws IOException {
+        while ((path = getParent(path)) != null) {
+            if (!inodes.containsKey(new EntryName(path)))
+                throw new NoSuchFileException(getString(path));
+        }
+    }
+
+    private static byte[] getParent(byte[] path) {
+        int off = path.length - 1;
+        if (off > 0 && path[off] == '/')  // isDirectory
+            off--;
+        while (off > 0 && path[off] != '/') { off--; }
+        if (off == 0)
+            return null;                  // top entry
+        return Arrays.copyOf(path, off + 1);
+    }
+
+    // If "starter" is the parent directory of "path"
+    private static boolean isParentOf(byte[] p, byte[] c) {
+        final int plen = p.length;
+        if (plen == 0)          // root dir
+            return true;
+        if (plen  >= c.length)
+            return false;
+        int n = 0;
+        while (n < plen) {
+            if (p[n] != c[n])
+                return false;
+            n++;
+        }
+        if (p[n - 1] != '/' && (c[n] != '/' || n == c.length - 1))
+            return false;
+        return true;
+    }
+
+    ///////////////////////////////////////////////////////////////////
+    private void initZipFile() throws IOException {
+        ch = zfpath.newByteChannel(READ);
+        initCEN();
+    }
+
+    private volatile boolean isOpen = true;
+    private SeekableByteChannel ch; // channel to the zipfile
+    ByteBuffer cen;        // CEN & ENDHDR
+    private END  end;
+    private long locpos;   // position of first LOC header (usually 0)
+
+    // name -> pos (in cen), package private for ZipInfo
+    LinkedHashMap<EntryName, IndexNode> inodes;
+
+    byte[] getBytes(String name) {
+        return zc.getBytes(name);
+    }
+    String getString(byte[] name) {
+        return zc.toString(name);
+    }
+
+    protected void finalize() throws IOException {
+        close();
+    }
+
+    private long getDataPos(Entry e) throws IOException {
+        if (e.locoff == -1) {
+            Entry e2 = getEntry0(e.name);
+            if (e2 == null)
+                throw new ZipException("invalid loc for entry <" + e.name + ">");
+            e.locoff = e2.locoff;
+        }
+        byte[] buf = new byte[LOCHDR];
+        if (readFullyAt(buf, 0, buf.length, e.locoff) != buf.length)
+            throw new ZipException("invalid loc for entry <" + e.name + ">");
+        return locpos + e.locoff + LOCHDR + LOCNAM(buf) + LOCEXT(buf);
+    }
+
+    // Reads len bytes of data from the specified offset into buf.
+    // Returns the total number of bytes read.
+    // Each/every byte read from here (except the cen, which is mapped).
+    private long readFullyAt(byte[] buf, int off, long len, long pos)
+        throws IOException
+    {
+        ByteBuffer bb = ByteBuffer.wrap(buf);
+        bb.position(off);
+        bb.limit((int)(off + len));
+        return readFullyAt(bb, pos);
+    }
+
+    private long readFullyAt(ByteBuffer bb, long pos)
+        throws IOException
+    {
+        synchronized(ch) {
+            return ch.position(pos).read(bb);
+        }
+    }
+
+    // Searches for end of central directory (END) header. The contents of
+    // the END header will be read and placed in endbuf. Returns the file
+    // position of the END header, otherwise returns -1 if the END header
+    // was not found or an error occurred.
+    private END findEND() throws IOException
+    {
+        byte[] buf = new byte[READBLOCKSZ];
+        long ziplen = ch.size();
+        long minHDR = (ziplen - END_MAXLEN) > 0 ? ziplen - END_MAXLEN : 0;
+        long minPos = minHDR - (buf.length - ENDHDR);
+
+        for (long pos = ziplen - buf.length; pos >= minPos; pos -= (buf.length - ENDHDR))
+        {
+            int off = 0;
+            if (pos < 0) {
+                // Pretend there are some NUL bytes before start of file
+                off = (int)-pos;
+                Arrays.fill(buf, 0, off, (byte)0);
+            }
+            int len = buf.length - off;
+            if (readFullyAt(buf, off, len, pos + off) != len)
+                zerror("zip END header not found");
+
+            // Now scan the block backwards for END header signature
+            for (int i = buf.length - ENDHDR; i >= 0; i--) {
+                if (buf[i+0] == (byte)'P'    &&
+                    buf[i+1] == (byte)'K'    &&
+                    buf[i+2] == (byte)'\005' &&
+                    buf[i+3] == (byte)'\006' &&
+                    (pos + i + ENDHDR + ENDCOM(buf, i) == ziplen)) {
+                    // Found END header
+                    buf = Arrays.copyOfRange(buf, i, i + ENDHDR);
+                    END end = new END();
+                    end.endsub = ENDSUB(buf);
+                    end.centot = ENDTOT(buf);
+                    end.cenlen = ENDSIZ(buf);
+                    end.cenoff = ENDOFF(buf);
+                    end.comlen = ENDCOM(buf);
+                    end.endpos = pos + i;
+                    if (end.cenlen == ZIP64_MINVAL ||
+                        end.cenoff == ZIP64_MINVAL ||
+                        end.centot == ZIP64_MINVAL32)
+                    {
+                        // need to find the zip64 end;
+                        byte[] loc64 = new byte[ZIP64_LOCHDR];
+                        if (readFullyAt(loc64, 0, loc64.length, end.endpos - ZIP64_LOCHDR)
+                            != loc64.length) {
+                            return end;
+                        }
+                        long end64pos = ZIP64_LOCOFF(loc64);
+                        byte[] end64buf = new byte[ZIP64_ENDHDR];
+                        if (readFullyAt(end64buf, 0, end64buf.length, end64pos)
+                            != end64buf.length) {
+                            return end;
+                        }
+                        // end64 found, re-calcualte everything.
+                        end.cenlen = ZIP64_ENDSIZ(end64buf);
+                        end.cenoff = ZIP64_ENDOFF(end64buf);
+                        end.centot = (int)ZIP64_ENDTOT(end64buf); // assume total < 2g
+                        end.endpos = end64pos;
+                    }
+                    return end;
+                }
+            }
+        }
+        zerror("zip END header not found");
+        return null; //make compiler happy
+    }
+
+    // Reads zip file central directory. Returns the file position of first
+    // CEN header, otherwise returns -1 if an error occured. If zip->msg != NULL
+    // then the error was a zip format error and zip->msg has the error text.
+    // Always pass in -1 for knownTotal; it's used for a recursive call.
+    private long initCEN() throws IOException {
+        end = findEND();
+        if (end.endpos == 0) {
+            inodes = new LinkedHashMap<EntryName, IndexNode>(10);
+            locpos = 0;
+            return 0;         // only END header present
+        }
+        if (end.cenlen > end.endpos)
+            zerror("invalid END header (bad central directory size)");
+        long cenpos = end.endpos - end.cenlen;     // position of CEN table
+
+        // Get position of first local file (LOC) header, taking into
+        // account that there may be a stub prefixed to the zip file.
+        locpos = cenpos - end.cenoff;
+        if (locpos < 0)
+            zerror("invalid END header (bad central directory offset)");
+
+        // read in the CEN and END
+        cen = ByteBuffer.allocate((int)(end.cenlen + ENDHDR));
+        if (readFullyAt(cen, cenpos) != end.cenlen + ENDHDR) {
+            zerror("read CEN tables failed");
+        }
+        cen.order(ByteOrder.LITTLE_ENDIAN).flip();
+
+        // Iterate through the entries in the central directory
+        inodes = new LinkedHashMap<EntryName, IndexNode>(end.centot + 1);
+        int pos = 0;
+        int limit = cen.remaining() - ENDHDR;
+        int i = 0;
+        byte[] bBuf = new byte[1024];
+        while (pos < limit) {
+            if (CENSIG(cen, pos) != CENSIG)
+                zerror("invalid CEN header (bad signature)");
+            int method = CENHOW(cen, pos);
+            int nlen   = CENNAM(cen, pos);
+            int elen   = CENEXT(cen, pos);
+            int clen   = CENCOM(cen, pos);
+            if ((CENFLG(cen, pos) & 1) != 0)
+                zerror("invalid CEN header (encrypted entry)");
+            if (method != METHOD_STORED && method != METHOD_DEFLATED)
+                zerror("invalid CEN header (bad compression method: " + method + ")");
+            if (pos + CENHDR + nlen > limit)
+                zerror("invalid CEN header (bad header size)");
+            if (bBuf.length < nlen)
+                 bBuf = new byte[nlen];
+            cen.position(pos + CENHDR);
+            byte[] name = new byte[nlen];
+            cen.get(name);
+            inodes.put(new EntryName(name), new IndexNode(name, pos));
+            // skip ext and comment
+            cen.position(pos += (CENHDR + nlen + elen + clen));
+            i++;
+        }
+        if (cen.remaining() != ENDHDR) {
+            zerror("invalid CEN header (bad header size)");
+        }
+        dirs = null;  // clear the dir map
+        return cenpos;
+    }
+
+    private void ensureOpen() throws IOException {
+        if (!isOpen)
+            throw new ClosedFileSystemException();
+    }
+
+    // Creates a new empty temporary file in the same directory as the
+    // specified file.  A variant of File.createTempFile.
+    private static Path createTempFileInSameDirectoryAs(Path path)
+        throws IOException
+    {
+        Path parent = path.toAbsolutePath().getParent();
+        String dir = (parent == null)? "." : parent.toString();
+        return File.createTempFile("zipfstmp", null, new File(dir)).toPath();
+    }
+
+    ////////////////////update & sync //////////////////////////////////////
+
+    private boolean hasUpdate = false;
+    private void updateDelete(Entry e) {
+        EntryName en = new EntryName(e.name);
+        inodes.remove(en);
+        hasUpdate = true;
+    }
+
+    private void update(Entry e) {
+        EntryName en = new EntryName(e.name);
+        inodes.put(en, e);
+        hasUpdate = true;
+    }
+
+    // copy over the whole LOC entry (header if necessary, data and ext) from
+    // old zip to the new one.
+    private long copyLOCEntry(Entry e, boolean updateHeader,
+                              OutputStream os,
+                              long written, byte[] buf)
+        throws IOException
+    {
+        long locoff = e.locoff;  // where to read
+        e.locoff = written;      // update the e.locoff with new value
+
+        // calculate the size need to write out
+        long size = 0;
+        //  if there is A ext
+        if ((e.flag & FLAG_DATADESCR) != 0) {
+            if (e.size >= ZIP64_MINVAL || e.csize >= ZIP64_MINVAL)
+                size = 24;
+            else
+                size = 16;
+        }
+        if (updateHeader) {       // if we need update the loc header
+            locoff += LOCHDR + e.nlen + e.elen;  // skip header
+            size += e.csize;
+            written = e.writeLOC(os) + size;
+        } else {
+            size += LOCHDR + e.nlen + e.elen + e.csize;
+            written = size;
+        }
+        int n;
+        while (size > 0 &&
+            (n = (int)readFullyAt(buf, 0, buf.length, locoff)) != -1)
+        {
+            if (size < n)
+                n = (int)size;
+            os.write(buf, 0, n);
+            size -= n;
+            locoff += n;
+        }
+        return written;
+    }
+
+    // sync the zip file system, if there is any udpate
+    private void sync() throws IOException {
+        assert Thread.holdsLock(this);
+
+        // check ex-closer
+        if (!exChClosers.isEmpty()) {
+            for (ExChannelCloser ecc : exChClosers) {
+                if (ecc.streams.isEmpty()) {
+                    ecc.ch.close();
+                    ecc.path.delete();
+                    exChClosers.remove(ecc);
+                }
+            }
+        }
+        if (!hasUpdate)
+            return;
+
+        Path tmpFile = createTempFileInSameDirectoryAs(zfpath);
+        OutputStream os = tmpFile.newOutputStream(WRITE);
+        ArrayList<Entry> elist = new ArrayList<>(inodes.size());
+        long written = 0;
+        byte[] buf = new byte[8192];
+        Entry e = null;
+
+        // write loc
+        for (IndexNode inode : inodes.values()) {
+            if (inode instanceof Entry) {    // an updated inode
+                e = (Entry)inode;
+                try {
+                    if (e.type == Entry.COPY) {
+                        // entry copy: the only thing changed is the "name"
+                        // and "nlen" in LOC header, so we udpate/rewrite the
+                        // LOC in new file and simply copy the rest (data and
+                        // ext) without enflating/deflating from the old zip
+                        // file LOC entry.
+                        written += copyLOCEntry(e, true, os, written, buf);
+                    } else {                          // NEW or FILECH
+                        e.locoff = written;
+                        written += e.writeLOC(os);    // write loc header
+                        if (e.bytes != null) {        // in-memory, deflated
+                            os.write(e.bytes);        // already
+                            written += e.bytes.length;
+                        } else if (e.file != null) {  // tmp file
+                            InputStream is = e.file.newInputStream();
+                            int n;
+                            if (e.type == Entry.NEW) {  // deflated already
+                                while ((n = is.read(buf)) != -1) {
+                                    os.write(buf, 0, n);
+                                    written += n;
+                                }
+                            } else if (e.type == Entry.FILECH) {
+                                // the data are not deflated, use ZEOS
+                                OutputStream os2 = new EntryOutputStream(e, os);
+                                while ((n = is.read(buf)) != -1) {
+                                    os2.write(buf, 0, n);
+                                }
+                                os2.close();
+                                written += e.csize;
+                                if ((e.flag & FLAG_DATADESCR) != 0)
+                                    written += e.writeEXT(os);
+                            }
+                            is.close();
+                            e.file.delete();
+                            tmppaths.remove(e.file);
+                        } else {
+                            // dir, 0-length data
+                        }
+                    }
+                    elist.add(e);
+                } catch (IOException x) {
+                    x.printStackTrace();    // skip any in-accurate entry
+                }
+            } else {    // unchanged inode
+                e = Entry.readCEN(cen, inode.pos);
+                try {
+                    written += copyLOCEntry(e, false, os, written, buf);
+                    elist.add(e);
+                } catch (IOException x) {
+                    x.printStackTrace();    // skip any wrong entry
+                }
+            }
+        }
+
+        // now write back the cen and end table
+        end.cenoff = written;
+        for (Entry entry : elist) {
+            written += entry.writeCEN(os);
+        }
+        end.centot = elist.size();
+        end.cenlen = written - end.cenoff;
+        end.write(os, written);
+        os.close();
+
+        if (!streams.isEmpty()) {
+            // There are outstanding input streams open on existing "ch",
+            // so, don't close the "cha" and delete the "file for now, let
+            // the "ex-channel-closer" to handle them
+            ExChannelCloser ecc = new ExChannelCloser(
+                                      createTempFileInSameDirectoryAs(zfpath),
+                                      ch,
+                                      streams);
+            zfpath.moveTo(ecc.path, REPLACE_EXISTING);
+            exChClosers.add(ecc);
+            streams = Collections.synchronizedSet(new HashSet<InputStream>());
+        } else {
+            ch.close();
+            zfpath.delete();
+        }
+        tmpFile.moveTo(zfpath, REPLACE_EXISTING);
+        hasUpdate = false;    // clear
+
+        if (isOpen) {
+            ch = zfpath.newByteChannel(READ); // re-fresh "ch" and "cen"
+            initCEN();
+        }
+        //System.out.println("->sync() done!");
+    }
+
+    private Entry getEntry0(byte[] path) throws IOException {
+        assert Thread.holdsLock(this);
+
+        if (path == null)
+            throw new NullPointerException("path");
+        if (path.length == 0)
+            return null;
+        EntryName en = new EntryName(path);
+        IndexNode inode = null;
+        synchronized (lock) {
+            ensureOpen();
+            if ((inode = inodes.get(en)) == null) {
+                if (path[path.length -1] == '/')  // already has a slash
+                    return null;
+                path = Arrays.copyOf(path, path.length + 1);
+                path[path.length - 1] = '/';
+                en.name(path);
+                if ((inode = inodes.get(en)) == null)
+                    return null;
+            }
+            if (inode instanceof Entry)
+                return (Entry)inode;
+            return Entry.readCEN(cen, inode.pos);
+        }
+    }
+
+    // Test if the "name" a parent directory of any entry (dir empty)
+    boolean isAncestor(byte[] name) {
+        for (Map.Entry<EntryName, IndexNode> entry : inodes.entrySet()) {
+            byte[] ename = entry.getKey().name;
+            if (isParentOf(name, ename))
+                return true;
+        }
+        return false;
+    }
+
+    public void deleteFile(byte[] path, boolean failIfNotExists)
+        throws IOException
+    {
+        checkWritable();
+        synchronized(lock) {
+            Entry e = getEntry0(path);
+            if (e == null) {
+                if (path != null && path.length == 0)
+                    throw new ZipException("root directory </> can't not be delete");
+                if (failIfNotExists)
+                    throw new NoSuchFileException(getString(path));
+            } else {
+                if (e.isDir() && isAncestor(path))
+                    throw new DirectoryNotEmptyException(getString(path));
+                updateDelete(e);
+            }
+        }
+    }
+
+    private static void copyStream(InputStream is, OutputStream os)
+        throws IOException
+    {
+        byte[] copyBuf = new byte[8192];
+        int n;
+        while ((n = is.read(copyBuf)) != -1) {
+            os.write(copyBuf, 0, n);
+        }
+    }
+
+    // Returns an out stream for either
+    // (1) writing the contents of a new entry, if the entry exits, or
+    // (2) updating/replacing the contents of the specified existing entry.
+    private OutputStream getOutputStream(Entry e) throws IOException {
+
+        ensureOpen();
+        if (e.mtime == -1)
+            e.mtime = javaToDosTime(System.currentTimeMillis());
+        if (e.method == -1)
+            e.method = METHOD_DEFLATED;  // TBD:  use default method
+        // store size, compressed size, and crc-32 in LOC header
+        e.flag = 0;
+        if (zc.isUTF8())
+            e.flag |= FLAG_EFS;
+        OutputStream os;
+        if (useTempFile) {
+            e.file = getTempPathForEntry(null);
+            os = e.file.newOutputStream(WRITE);
+        } else {
+            os = new ByteArrayOutputStream((e.size > 0)? (int)e.size : 8192);
+        }
+        return new EntryOutputStream(e, os);
+    }
+
+    private InputStream getInputStream(Entry e)
+        throws IOException
+    {
+        InputStream eis = null;
+
+        if (e.type == Entry.NEW) {
+            if (e.bytes != null)
+                eis = new ByteArrayInputStream(e.bytes);
+            else if (e.file != null)
+                eis = e.file.newInputStream();
+            else
+                throw new ZipException("update entry data is missing");
+        } else if (e.type == Entry.FILECH) {
+            // FILECH result is un-compressed.
+            eis = e.file.newInputStream();
+            // TBD: wrap to hook close()
+            // streams.add(eis);
+            return eis;
+        } else {  // untouced  CEN or COPY
+            eis = new EntryInputStream(e, ch);
+        }
+        if (e.method == METHOD_DEFLATED) {
+            // MORE: Compute good size for inflater stream:
+            long bufSize = e.size + 2; // Inflater likes a bit of slack
+            if (bufSize > 65536)
+                bufSize = 8192;
+            final long size = e.size;;
+            eis = new InflaterInputStream(eis, getInflater(), (int)bufSize) {
+
+                private boolean isClosed = false;
+                public void close() throws IOException {
+                    if (!isClosed) {
+                        releaseInflater(inf);
+                        this.in.close();
+                        isClosed = true;
+                    }
+                }
+                // Override fill() method to provide an extra "dummy" byte
+                // at the end of the input stream. This is required when
+                // using the "nowrap" Inflater option. (it appears the new
+                // zlib in 7 does not need it, but keep it for now)
+                protected void fill() throws IOException {
+                    if (eof) {
+                        throw new EOFException(
+                            "Unexpected end of ZLIB input stream");
+                    }
+                    len = this.in.read(buf, 0, buf.length);
+                    if (len == -1) {
+                        buf[0] = 0;
+                        len = 1;
+                        eof = true;
+                    }
+                    inf.setInput(buf, 0, len);
+                }
+                private boolean eof;
+
+                public int available() throws IOException {
+                    if (isClosed)
+                        return 0;
+                    long avail = size - inf.getBytesWritten();
+                    return avail > (long) Integer.MAX_VALUE ?
+                        Integer.MAX_VALUE : (int) avail;
+                }
+            };
+        } else if (e.method != METHOD_STORED) {
+            throw new ZipException("invalid compression method");
+        }
+        streams.add(eis);
+        return eis;
+    }
+
+    // Inner class implementing the input stream used to read
+    // a (possibly compressed) zip file entry.
+    private class EntryInputStream extends InputStream {
+        private SeekableByteChannel zfch; // local ref to zipfs's "ch". zipfs.ch might
+                                          // point to a new channel after sync()
+        private   long pos;               // current position within entry data
+        protected long rem;               // number of remaining bytes within entry
+        protected long size;              // uncompressed size of this entry
+
+        EntryInputStream(Entry e, SeekableByteChannel zfch)
+            throws IOException
+        {
+            this.zfch = zfch;
+            rem = e.csize;
+            size = e.size;
+            pos = getDataPos(e);
+        }
+        public int read(byte b[], int off, int len) throws IOException {
+            ensureOpen();
+            if (rem == 0) {
+                return -1;
+            }
+            if (len <= 0) {
+                return 0;
+            }
+            if (len > rem) {
+                len = (int) rem;
+            }
+            // readFullyAt()
+            long n = 0;
+            ByteBuffer bb = ByteBuffer.wrap(b);
+            bb.position(off);
+            bb.limit(off + len);
+            synchronized(zfch) {
+                n = zfch.position(pos).read(bb);
+            }
+            if (n > 0) {
+                pos += n;
+                rem -= n;
+            }
+            if (rem == 0) {
+                close();
+            }
+            return (int)n;
+        }
+        public int read() throws IOException {
+            byte[] b = new byte[1];
+            if (read(b, 0, 1) == 1) {
+                return b[0] & 0xff;
+            } else {
+                return -1;
+            }
+        }
+        public long skip(long n) throws IOException {
+            ensureOpen();
+            if (n > rem)
+                n = rem;
+            pos += n;
+            rem -= n;
+            if (rem == 0) {
+                close();
+            }
+            return n;
+        }
+        public int available() {
+            return rem > Integer.MAX_VALUE ? Integer.MAX_VALUE : (int) rem;
+        }
+
+        public long size() {
+            return size;
+        }
+        public void close() {
+            rem = 0;
+            streams.remove(this);
+        }
+    }
+
+    class EntryOutputStream extends DeflaterOutputStream
+    {
+        private CRC32 crc;
+        private Entry e;
+        private long written;
+
+        EntryOutputStream(Entry e, OutputStream os)
+            throws IOException
+        {
+            super(os, getDeflater());
+            if (e == null)
+                throw new NullPointerException("Zip entry is null");
+            this.e = e;
+            crc = new CRC32();
+        }
+
+        @Override
+        public void write(byte b[], int off, int len) throws IOException {
+            if (e.type != Entry.FILECH)    // only from sync
+                ensureOpen();
+            if (off < 0 || len < 0 || off > b.length - len) {
+                throw new IndexOutOfBoundsException();
+            } else if (len == 0) {
+                return;
+            }
+            switch (e.method) {
+            case METHOD_DEFLATED:
+                super.write(b, off, len);
+                break;
+            case METHOD_STORED:
+                written += len;
+                out.write(b, off, len);
+                break;
+            default:
+                throw new ZipException("invalid compression method");
+            }
+            crc.update(b, off, len);
+        }
+
+        @Override
+        public void close() throws IOException {
+            // TBD ensureOpen();
+            switch (e.method) {
+            case METHOD_DEFLATED:
+                finish();
+                e.size  = def.getBytesRead();
+                e.csize = def.getBytesWritten();
+                e.crc = crc.getValue();
+                break;
+            case METHOD_STORED:
+                // we already know that both e.size and e.csize are the same
+                e.size = e.csize = written;
+                e.crc = crc.getValue();
+                break;
+            default:
+                throw new ZipException("invalid compression method");
+            }
+            //crc.reset();
+            if (out instanceof ByteArrayOutputStream)
+                e.bytes = ((ByteArrayOutputStream)out).toByteArray();
+
+            if (e.type == Entry.FILECH) {
+                releaseDeflater(def);
+                return;
+            }
+            super.close();
+            releaseDeflater(def);
+            update(e);
+        }
+    }
+
+    private static void zerror(String msg) {
+        throw new ZipError(msg);
+    }
+
+    // Maxmum number of de/inflater we cache
+    private final int MAX_FLATER = 20;
+    // List of available Inflater objects for decompression
+    private List<Inflater> inflaters = new ArrayList<>();
+
+    // Gets an inflater from the list of available inflaters or allocates
+    // a new one.
+    private Inflater getInflater() {
+        synchronized (inflaters) {
+            int size = inflaters.size();
+            if (size > 0) {
+                Inflater inf = (Inflater)inflaters.remove(size - 1);
+                return inf;
+            } else {
+                return new Inflater(true);
+            }
+        }
+    }
+
+    // Releases the specified inflater to the list of available inflaters.
+    private void releaseInflater(Inflater inf) {
+        synchronized (inflaters) {
+            if (inflaters.size() < MAX_FLATER) {
+                inf.reset();
+                inflaters.add(inf);
+            } else {
+                inf.end();
+            }
+        }
+    }
+
+    // List of available Deflater objects for compression
+    private List<Deflater> deflaters = new ArrayList<>();
+
+    // Gets an deflater from the list of available deflaters or allocates
+    // a new one.
+    private Deflater getDeflater() {
+        synchronized (deflaters) {
+            int size = deflaters.size();
+            if (size > 0) {
+                Deflater def = (Deflater)deflaters.remove(size - 1);
+                return def;
+            } else {
+                return new Deflater(Deflater.DEFAULT_COMPRESSION, true);
+            }
+        }
+    }
+
+    // Releases the specified inflater to the list of available inflaters.
+    private void releaseDeflater(Deflater def) {
+        synchronized (deflaters) {
+            if (inflaters.size() < MAX_FLATER) {
+               def.reset();
+               deflaters.add(def);
+            } else {
+               def.end();
+            }
+        }
+    }
+
+    // End of central directory record
+    static class END {
+        int  disknum;
+        int  sdisknum;
+        int  endsub;     // endsub
+        int  centot;     // 4 bytes
+        long cenlen;     // 4 bytes
+        long cenoff;     // 4 bytes
+        int  comlen;     // comment length
+        byte[] comment;
+
+        /* members of Zip64 end of central directory locator */
+        int diskNum;
+        long endpos;
+        int disktot;
+
+        void write(OutputStream os, long offset) throws IOException {
+            boolean hasZip64 = false;
+            long xlen = cenlen;
+            long xoff = cenoff;
+            if (xlen >= ZIP64_MINVAL) {
+                xlen = ZIP64_MINVAL;
+                hasZip64 = true;
+            }
+            if (xoff >= ZIP64_MINVAL) {
+                xoff = ZIP64_MINVAL;
+                hasZip64 = true;
+            }
+            int count = centot;
+            if (count >= ZIP64_MINVAL32) {
+                count = ZIP64_MINVAL32;
+                hasZip64 = true;
+            }
+            if (hasZip64) {
+                long off64 = offset;
+                //zip64 end of central directory record
+                writeInt(os, ZIP64_ENDSIG);       // zip64 END record signature
+                writeLong(os, ZIP64_ENDHDR - 12); // size of zip64 end
+                writeShort(os, 45);               // version made by
+                writeShort(os, 45);               // version needed to extract
+                writeInt(os, 0);                  // number of this disk
+                writeInt(os, 0);                  // central directory start disk
+                writeLong(os, centot);            // number of directory entires on disk
+                writeLong(os, centot);            // number of directory entires
+                writeLong(os, cenlen);            // length of central directory
+                writeLong(os, cenoff);            // offset of central directory
+
+                //zip64 end of central directory locator
+                writeInt(os, ZIP64_LOCSIG);       // zip64 END locator signature
+                writeInt(os, 0);                  // zip64 END start disk
+                writeLong(os, off64);             // offset of zip64 END
+                writeInt(os, 1);                  // total number of disks (?)
+            }
+            writeInt(os, ENDSIG);                 // END record signature
+            writeShort(os, 0);                    // number of this disk
+            writeShort(os, 0);                    // central directory start disk
+            writeShort(os, count);                // number of directory entries on disk
+            writeShort(os, count);                // total number of directory entries
+            writeInt(os, xlen);                   // length of central directory
+            writeInt(os, xoff);                   // offset of central directory
+            if (comment != null) {            // zip file comment
+                writeShort(os, comment.length);
+                writeBytes(os, comment);
+            } else {
+                writeShort(os, 0);
+            }
+        }
+    }
+
+    // wrapper for the byte[] name
+    static class EntryName {
+        byte[] name;
+        int hashcode;    // node is hashable/hashed by its name
+
+        public EntryName (byte[] name) {
+            name(name);
+        }
+
+        void name(byte[] name) {
+            this.name = name;
+            this.hashcode = Arrays.hashCode(name);
+        }
+
+        public boolean equals(Object other) {
+            if (!(other instanceof EntryName))
+                return false;
+            return Arrays.equals(name, ((EntryName)other).name);
+        }
+
+        public int hashCode() {
+            return hashcode;
+        }
+    }
+
+    // can simply use Integer instead, if we don't use it to
+    // build a internal node tree.
+    static class IndexNode {
+        byte[] name;
+        int pos = -1;     // postion in cen table, -1 menas the
+                          // entry does not exists in zip file
+        IndexNode(byte[] name, int pos) {
+            this.name = name;
+            this.pos = pos;
+        }
+
+        IndexNode() {}
+
+        IndexNode sibling;
+        IndexNode child;  // 1st child
+    }
+
+    static class Entry extends IndexNode {
+
+        static final int CEN    = 1;    // entry read from cen
+        static final int NEW    = 2;    // updated contents in bytes or file
+        static final int FILECH = 3;    // fch update in "file"
+        static final int COPY   = 4;    // copy of a CEN entry
+
+        byte[] bytes;      // updated content bytes
+        Path   file;       // use tmp file to store bytes;
+        int    type = CEN; // default is the entry read from cen
+
+        // entry attributes
+        int    version;
+        int    flag;
+        int    method = -1;    // compression method
+        long   mtime  = -1;    // last modification time (in DOS time)
+        long   atime  = -1;    // last access time
+        long   ctime  = -1;    // create time
+        long   crc    = -1;    // crc-32 of entry data
+        long   csize  = -1;    // compressed size of entry data
+        long   size   = -1;    // uncompressed size of entry data
+        int    nlen;
+        int    elen;
+        byte[] extra;
+
+        // loc
+        long   startPos;
+        long   endPos;         // exclusive
+
+        // cen
+        int    versionMade;
+        int    disk;
+        int    attrs;
+        long   attrsEx;
+        long   locoff;
+
+        int    clen;
+        byte[] comment;
+
+        // ZIP64 flag
+        boolean hasZip64;
+
+        Entry() {}
+
+        Entry(byte[] name) {
+            this.name = name;
+            //this.nlen = name.length;
+            this.mtime  = javaToDosTime(System.currentTimeMillis());
+            this.crc       = 0;
+            this.size      = 0;
+            this.csize     = 0;
+            this.method    = METHOD_DEFLATED;
+        }
+
+        Entry(byte[] name, int type) {
+            this(name);
+            this.type = type;
+        }
+
+        Entry (byte[] name, Path file, int type) {
+            this(name, type);
+            this.file = file;
+            this.method = METHOD_STORED;
+        }
+
+        Entry(Entry e) {
+            this.version   = e.version;
+            this.name      = e.name;  // copyOf?
+            this.nlen      = e.nlen;
+            this.ctime     = e.ctime;
+            this.atime     = e.atime;
+            this.mtime     = e.mtime;
+            this.crc       = e.crc;
+            this.size      = e.size;
+            this.csize     = e.csize;
+            this.method    = e.method;
+            this.extra     = (e.extra == null)?
+                             null:Arrays.copyOf(e.extra, e.extra.length);
+            this.elen      = e.elen;
+            this.versionMade = e.versionMade;
+            this.disk      = e.disk;
+            this.attrs     = e.attrs;
+            this.attrsEx   = e.attrsEx;
+            this.locoff    = e.locoff;
+            this.clen      = e.clen;
+            this.comment   = (e.comment == null)?
+                             null:Arrays.copyOf(e.comment, e.comment.length);
+            this.startPos = e.startPos;
+            this.endPos   = e.endPos;
+            this.hasZip64 = e.hasZip64;;
+        }
+
+        Entry (Entry e, int type) {
+            this(e);
+            this.type = type;
+        }
+
+        boolean isDir() {
+            return name != null &&
+                   (name.length == 0 ||
+                    name[name.length - 1] == '/');
+        }
+
+        int version() throws ZipException {
+            if (method == METHOD_DEFLATED)
+                return 20;
+            else if (method == METHOD_STORED)
+                return 10;
+            throw new ZipException("unsupported compression method");
+        }
+
+        ///////////////////// CEN //////////////////////
+        static Entry readCEN(ByteBuffer cen, int pos) throws IOException
+        {
+            return new Entry().cen(cen, pos);
+        }
+
+        private Entry cen(ByteBuffer cen, int pos) throws IOException
+        {
+            if (CENSIG(cen, pos) != CENSIG)
+                zerror("invalid CEN header (bad signature)");
+            versionMade = CENVEM(cen, pos);
+            version     = CENVER(cen, pos);
+            flag        = CENFLG(cen, pos);
+            method      = CENHOW(cen, pos);
+            mtime       = CENTIM(cen, pos);
+            crc         = CENCRC(cen, pos);
+            csize       = CENSIZ(cen, pos);
+            size        = CENLEN(cen, pos);
+            nlen        = CENNAM(cen, pos);
+            elen        = CENEXT(cen, pos);
+            clen        = CENCOM(cen, pos);
+            disk        = CENDSK(cen, pos);
+            attrs       = CENATT(cen, pos);
+            attrsEx     = CENATX(cen, pos);
+            locoff      = CENOFF(cen, pos);
+
+            cen.position(pos + CENHDR);
+            name = new byte[nlen];
+            cen.get(name);
+
+            if (elen > 0) {
+                extra = new byte[elen];
+                cen.get(extra);
+                if (csize == ZIP64_MINVAL || size == ZIP64_MINVAL ||
+                    locoff == ZIP64_MINVAL) {
+                    int off = 0;
+                    while (off + 4 < elen) {
+                        // extra spec: HeaderID+DataSize+Data
+                        int sz = SH(extra, off + 2);
+                        if (SH(extra, off) == EXTID_ZIP64) {
+                            off += 4;
+                            if (size == ZIP64_MINVAL) {
+                                // if invalid zip64 extra fields, just skip
+                                if (sz < 8 || (off + 8) > elen)
+                                    break;
+                                size = LL(extra, off);
+                                sz -= 8;
+                                off += 8;
+                            }
+                            if (csize == ZIP64_MINVAL) {
+                                if (sz < 8 || (off + 8) > elen)
+                                    break;
+                                csize = LL(extra, off);
+                                sz -= 8;
+                                off += 8;
+                            }
+                            if (locoff == ZIP64_MINVAL) {
+                                if (sz < 8 || (off + 8) > elen)
+                                    break;
+                                locoff = LL(extra, off);
+                                sz -= 8;
+                                off += 8;
+                            }
+                            break;
+                        }
+                        off += (sz + 4);
+                    }
+                }
+            }
+            if (clen > 0) {
+                comment = new byte[clen];
+                cen.get(comment);
+            }
+            return this;
+        }
+
+        int writeCEN(OutputStream os) throws IOException
+        {
+            int written  = CENHDR;
+            int version0 = version();
+
+            long csize0  = csize;
+            long size0   = size;
+            long locoff0 = locoff;
+            int e64len   = 0;
+
+            // confirm size/length
+            nlen = (name != null) ? name.length : 0;
+            elen = (extra != null) ? extra.length : 0;
+            clen = (comment != null) ? comment.length : 0;
+
+            boolean hasZip64 = false;
+            if (csize >= ZIP64_MINVAL) {
+                csize0 = ZIP64_MINVAL;
+                e64len += 8;                 // csize(8)
+                hasZip64 = true;
+            }
+            if (size >= ZIP64_MINVAL) {
+                size0 = ZIP64_MINVAL;        // size(8)
+                e64len += 8;
+                hasZip64 = true;
+            }
+            if (locoff >= ZIP64_MINVAL) {
+                locoff0 = ZIP64_MINVAL;
+                e64len += 8;                 // offset(8)
+                hasZip64 = true;
+            }
+            writeInt(os, CENSIG);            // CEN header signature
+            if (hasZip64) {
+                writeShort(os, 45);          // ver 4.5 for zip64
+                writeShort(os, 45);
+            } else {
+                writeShort(os, version0);    // version made by
+                writeShort(os, version0);    // version needed to extract
+            }
+            writeShort(os, flag);            // general purpose bit flag
+            writeShort(os, method);          // compression method
+            writeInt(os, mtime);             // last modification time
+            writeInt(os, crc);               // crc-32
+            writeInt(os, csize0);            // compressed size
+            writeInt(os, size0);             // uncompressed size
+            writeShort(os, name.length);
+
+            if (hasZip64) {
+                // + headid(2) + datasize(2)
+                writeShort(os, e64len + 4 + elen);
+            } else {
+                writeShort(os, elen);
+            }
+            if (comment != null) {
+                writeShort(os, Math.min(clen, 0xffff));
+            } else {
+                writeShort(os, 0);
+            }
+            writeShort(os, 0);              // starting disk number
+            writeShort(os, 0);              // internal file attributes (unused)
+            writeInt(os, 0);                // external file attributes (unused)
+            writeInt(os, locoff0);          // relative offset of local header
+            writeBytes(os, name);
+            if (hasZip64) {
+                writeShort(os, EXTID_ZIP64);// Zip64 extra
+                writeShort(os, e64len);
+                if (size0 == ZIP64_MINVAL)
+                    writeLong(os, size);
+                if (csize0 == ZIP64_MINVAL)
+                    writeLong(os, csize);
+                if (locoff0 == ZIP64_MINVAL)
+                    writeLong(os, locoff);
+            }
+            if (extra != null) {
+                writeBytes(os, extra);
+            }
+            if (comment != null) {
+                //TBD: 0, Math.min(commentBytes.length, 0xffff));
+                writeBytes(os, comment);
+            }
+            return CENHDR + nlen + elen + clen + (hasZip64?(e64len + 4):0);
+        }
+
+        ///////////////////// LOC //////////////////////
+        static Entry readLOC(ZipFileSystem zf, long pos)
+            throws IOException
+        {
+            return readLOC(zf, pos, new byte[1024]);
+        }
+
+        static Entry readLOC(ZipFileSystem zf, long pos, byte[] buf)
+            throws IOException
+        {
+            return new Entry().loc(zf, pos, buf);
+        }
+
+        Entry loc(ZipFileSystem zf, long pos, byte[] buf)
+            throws IOException
+        {
+            assert (buf.length >= LOCHDR);
+            if (zf.readFullyAt(buf, 0, LOCHDR , pos) != LOCHDR) {
+                throw new ZipException("loc: reading failed");
+            }
+            if (LOCSIG(buf) != LOCSIG) {
+                throw new ZipException("loc: wrong sig ->"
+                                       + Long.toString(LOCSIG(buf), 16));
+            }
+            startPos = pos;
+            version  = LOCVER(buf);
+            flag     = LOCFLG(buf);
+            method   = LOCHOW(buf);
+            mtime    = LOCTIM(buf);
+            crc      = LOCCRC(buf);
+            csize    = LOCSIZ(buf);
+            size     = LOCLEN(buf);
+            nlen     = LOCNAM(buf);
+            elen     = LOCEXT(buf);
+
+            name = new byte[nlen];
+            if (zf.readFullyAt(name, 0, nlen, pos + LOCHDR) != nlen) {
+                throw new ZipException("loc: name reading failed");
+            }
+            if (elen > 0) {
+                extra = new byte[elen];
+                if (zf.readFullyAt(extra, 0, elen, pos + LOCHDR + nlen)
+                    != elen) {
+                    throw new ZipException("loc: ext reading failed");
+                }
+            }
+            pos += (LOCHDR + nlen + elen);
+            if ((flag & FLAG_DATADESCR) != 0) {
+                // Data Descriptor
+                Entry e = zf.getEntry0(name);  // get the size/csize from cen
+                if (e == null)
+                    throw new ZipException("loc: name not found in cen");
+                size = e.size;
+                csize = e.csize;
+                pos += (method == METHOD_STORED ? size : csize);
+                if (size >= ZIP64_MINVAL || csize >= ZIP64_MINVAL)
+                    pos += 24;
+                else
+                    pos += 16;
+            } else {
+                boolean hasZip64 = false;
+                if (extra != null &&
+                    (size == ZIP64_MINVAL || csize == ZIP64_MINVAL)) {
+                    // zip64 ext: must include both size and csize
+                    int off = 0;
+                    while (off + 20 < elen) {    // HeaderID+DataSize+Data
+                        int sz = SH(extra, off + 2);
+                        if (SH(extra, off) == EXTID_ZIP64 && sz == 16) {
+                            size = LL(extra, off + 4);
+                            csize = LL(extra, off + 12);
+                            hasZip64 = true;
+                            break;
+                        }
+                        off += (sz + 4);
+                    }
+                }
+                pos += (method == METHOD_STORED ? size : csize);
+            }
+            endPos = pos;
+            return this;
+        }
+
+        int writeLOC(OutputStream os)
+            throws IOException
+        {
+            writeInt(os, LOCSIG);               // LOC header signature
+
+            int version = version();
+            if ((flag & FLAG_DATADESCR) != 0) {
+                writeShort(os, version());      // version needed to extract
+                writeShort(os, flag);           // general purpose bit flag
+                writeShort(os, method);         // compression method
+                writeInt(os, mtime);            // last modification time
+
+                // store size, uncompressed size, and crc-32 in data descriptor
+                // immediately following compressed entry data
+                writeInt(os, 0);
+                writeInt(os, 0);
+                writeInt(os, 0);
+            } else {
+                if (csize >= ZIP64_MINVAL || size >= ZIP64_MINVAL) {
+                    hasZip64 = true;
+                    writeShort(os, 45);         // ver 4.5 for zip64
+                } else {
+                    writeShort(os, version());  // version needed to extract
+                }
+                writeShort(os, flag);           // general purpose bit flag
+                writeShort(os, method);         // compression method
+                writeInt(os, mtime);            // last modification time
+                writeInt(os, crc);              // crc-32
+                if (hasZip64) {
+                    writeInt(os, ZIP64_MINVAL);
+                    writeInt(os, ZIP64_MINVAL);
+                    //TBD:  e.elen += 20;       //headid(2) + size(2) + size(8) + csize(8)
+                } else {
+                    writeInt(os, csize);        // compressed size
+                    writeInt(os, size);         // uncompressed size
+                }
+            }
+            writeShort(os, name.length);
+            writeShort(os, elen + (hasZip64 ? 20 : 0));
+            writeBytes(os, name);
+            if (hasZip64) {
+                // TBD: should we update extra directory?
+                writeShort(os, EXTID_ZIP64);
+                writeShort(os, 16);
+                writeLong(os, size);
+                writeLong(os, csize);
+            }
+            if (extra != null) {
+                writeBytes(os, extra);
+            }
+            return LOCHDR + name.length + elen + (hasZip64 ? 20 : 0);
+        }
+
+        // Data Descriptior
+        int writeEXT(OutputStream os)
+            throws IOException
+        {
+            writeInt(os, EXTSIG);           // EXT header signature
+            writeInt(os, crc);              // crc-32
+            if (csize >= ZIP64_MINVAL || size >= ZIP64_MINVAL) {
+                writeLong(os, csize);
+                writeLong(os, size);
+                return 24;
+            } else {
+                writeInt(os, csize);        // compressed size
+                writeInt(os, size);         // uncompressed size
+                return 16;
+            }
+        }
+
+        // read NTFS, UNIX and ZIP64 data from cen.extra
+        void readExtra() {
+            if (extra == null)
+                return;
+            int elen = extra.length;
+            int off = 0;
+            while (off + 4 < elen) {
+                // extra spec: HeaderID+DataSize+Data
+                int sz = SH(extra, off + 2);
+                int tag = SH(extra, off);
+                off += 4;
+                int pos = off;
+                if (pos + sz > elen)         // invalid data
+                    break;
+                switch (tag) {
+                case EXTID_ZIP64 :
+                    if (size == ZIP64_MINVAL) {
+                        if (pos + 8 > elen)  // invalid zip64 extra
+                            break;           // fields, just skip
+                        size = LL(extra, pos);
+                        pos += 8;
+                    }
+                    if (csize == ZIP64_MINVAL) {
+                        if (pos + 8 > elen)
+                            break;
+                        csize = LL(extra, pos);
+                        pos += 8;
+                    }
+                    if (locoff == ZIP64_MINVAL) {
+                        if (pos + 8 > elen)
+                            break;
+                        locoff = LL(extra, pos);
+                        pos += 8;
+                    }
+                    break;
+                case EXTID_NTFS:
+                    pos += 4;    // reserved 4 bytes
+                    if (SH(extra, pos) !=  0x0001)
+                        break;
+                    if (SH(extra, pos + 2) != 24)
+                        break;
+                    mtime = LL(extra, pos + 4);
+                    atime = LL(extra, pos + 12);
+                    ctime = LL(extra, pos + 20);
+                    break;
+                case EXTID_UNIX:
+                    atime = LG(extra, pos);
+                    mtime = LG(extra, pos + 4);
+                    break;
+                default:    // unknow
+                }
+                off += sz;
+            }
+        }
+    }
+
+    private static class ExChannelCloser  {
+        Path path;
+        SeekableByteChannel ch;
+        Set<InputStream> streams;
+        ExChannelCloser(Path path,
+                        SeekableByteChannel ch,
+                        Set<InputStream> streams)
+        {
+            this.path = path;
+            this.ch = ch;
+            this.streams = streams;
+        }
+    }
+
+    // ZIP directory has two issues:
+    // (1) ZIP spec does not require the ZIP file to include
+    //     directory entry
+    // (2) all entries are not stored/organized in a "tree"
+    //     structure.
+    // A possible solution is to build the node tree ourself as
+    // implemented below.
+    private HashMap<EntryName, IndexNode> dirs;
+    private IndexNode root;
+    private IndexNode addToDir(EntryName child) {
+        IndexNode cinode = dirs.get(child);
+        if (cinode != null)
+            return cinode;
+
+        byte[] cname = child.name;
+        byte[] pname = getParent(cname);
+        IndexNode pinode;
+
+        if (pname != null)
+            pinode = addToDir(new EntryName(pname));
+        else
+            pinode = root;
+        cinode = inodes.get(child);
+        if (cname[cname.length -1] != '/') {  // not a dir
+            cinode.sibling = pinode.child;
+            pinode.child = cinode;
+            return null;
+        }
+        cinode = dirs.get(child);
+        if (cinode == null)  // pseudo directry entry
+            cinode = new IndexNode(cname, -1);
+        cinode.sibling = pinode.child;
+        pinode.child = cinode;
+
+        dirs.put(child, cinode);
+        return cinode;
+    }
+
+    private HashMap<EntryName, IndexNode> getDirs()
+        throws IOException
+    {
+        if (hasUpdate)
+            sync();
+        if (dirs != null)
+            return dirs;
+        dirs = new HashMap<EntryName, IndexNode>();
+        byte[] empty = new byte[0];
+        root = new IndexNode(empty, -1);
+        dirs.put(new EntryName(empty), root);
+
+        EntryName[] names = inodes.keySet().toArray(new EntryName[0]);
+        int i = names.length;
+        while (--i >= 0) {
+            addToDir(names[i]);
+        }
+        // for (int i EntryName en : inodes.keySet()) {
+        //     addToDir(en);
+        // }
+        return dirs;
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipFileSystemProvider.java	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,152 @@
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Oracle nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.sun.nio.zipfs;
+
+import java.io.IOException;
+import java.nio.channels.FileChannel;
+import java.nio.file.FileRef;
+import java.nio.file.FileSystem;
+import java.nio.file.FileSystemNotFoundException;
+import java.nio.file.FileSystemAlreadyExistsException;
+import java.nio.file.OpenOption;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.ProviderMismatchException;
+import java.nio.file.attribute.FileAttribute;
+import java.nio.file.spi.FileSystemProvider;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+/*
+ *
+ * @author  Xueming Shen, Rajendra Gutupalli, Jaya Hangal
+ */
+
+public class ZipFileSystemProvider extends FileSystemProvider {
+    private final Map<Path, ZipFileSystem> filesystems = new HashMap<>();
+
+    public ZipFileSystemProvider() {}
+
+    @Override
+    public String getScheme() {
+        return "zip";
+    }
+
+    protected Path uriToPath(URI uri) {
+        String scheme = uri.getScheme();
+        if ((scheme == null) || !scheme.equalsIgnoreCase(getScheme())) {
+            throw new IllegalArgumentException("URI scheme is not '" + getScheme() + "'");
+        }
+        try {
+            return Paths.get(new URI("file", uri.getHost(), uri.getPath(), null))
+                        .toAbsolutePath();
+        } catch (URISyntaxException e) {
+            throw new AssertionError(e); //never thrown
+        }
+    }
+
+    @Override
+    public FileSystem newFileSystem(URI uri, Map<String, ?> env)
+        throws IOException
+    {
+        return newFileSystem(uriToPath(uri), env);
+    }
+
+    @Override
+    public FileSystem newFileSystem(FileRef file, Map<String, ?> env)
+        throws IOException
+    {
+        if (!(file instanceof Path))
+            throw new UnsupportedOperationException();
+        Path path = (Path)file;
+        if (!path.toUri().getScheme().equalsIgnoreCase("file")) {
+            throw new UnsupportedOperationException();
+        }
+        return newFileSystem(path, env);
+    }
+
+    private FileSystem newFileSystem(Path path, Map<String, ?> env)
+        throws IOException
+    {
+        synchronized(filesystems) {
+            if (filesystems.containsKey(path))
+                throw new FileSystemAlreadyExistsException();
+            ZipFileSystem zipfs = new ZipFileSystem(this, path, env);
+            filesystems.put(path, zipfs);
+            return zipfs;
+        }
+    }
+
+    @Override
+    public Path getPath(URI uri) {
+        FileSystem fs = getFileSystem(uri);
+        String fragment = uri.getFragment();
+        if (fragment == null) {
+            throw new IllegalArgumentException("URI: "
+                + uri
+                + " does not contain path fragment ex. zip:///c:/foo.zip#/BAR");
+        }
+        return fs.getPath(fragment);
+    }
+
+    @Override
+    public FileChannel newFileChannel(Path path,
+            Set<? extends OpenOption> options,
+            FileAttribute<?>... attrs)
+            throws IOException
+    {
+        if (path == null)
+            throw new NullPointerException("path is null");
+        if (path instanceof ZipPath)
+            return ((ZipPath)path).newFileChannel(options, attrs);
+        throw new ProviderMismatchException();
+    }
+
+    @Override
+    public FileSystem getFileSystem(URI uri) {
+        synchronized (filesystems) {
+            ZipFileSystem zipfs = filesystems.get(uriToPath(uri));
+            if (zipfs == null)
+                throw new FileSystemNotFoundException();
+            return zipfs;
+        }
+    }
+
+    void removeFileSystem(Path zfpath) {
+        synchronized (filesystems) {
+            filesystems.remove(zfpath);
+        }
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipInfo.java	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Oracle nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.sun.nio.zipfs;
+
+import java.io.PrintStream;
+import java.nio.file.Paths;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.Map;
+import com.sun.nio.zipfs.ZipFileSystem.Entry;
+import static com.sun.nio.zipfs.ZipConstants.*;
+import static com.sun.nio.zipfs.ZipUtils.*;
+
+/**
+ * Print the loc and cen tables of the ZIP file
+ *
+ * @author  Xueming Shen
+ */
+
+public class ZipInfo {
+
+    public static void main(String[] args) throws Throwable {
+        if (args.length < 2) {
+            print("Usage: java ZipInfo [cen|loc] zfname");
+        } else {
+            Map<String, ?> env = Collections.emptyMap();
+            ZipFileSystem zfs = (ZipFileSystem)(new ZipFileSystemProvider()
+                                    .newFileSystem(Paths.get(args[1]), env));
+
+            long pos = 0;
+
+            if ("loc".equals(args[0])) {
+                print("[Local File Header]%n");
+                byte[] buf = new byte[1024];
+                for (int i = 0; i < zfs.getEntryNames().length; i++) {
+                    Entry loc = Entry.readLOC(zfs, pos, buf);
+                    print("--------loc[%x]--------%n", pos);
+                    printLOC(loc);
+                    pos = loc.endPos;
+                }
+            } if ("cen".equals(args[0])) {
+                int i = 0;
+                Iterator<ZipFileSystem.IndexNode> itr = zfs.inodes.values().iterator();
+                print("[Central Directory Header]%n");
+                while (itr.hasNext()) {
+                    Entry cen = Entry.readCEN(zfs.cen, itr.next().pos);
+                    print("--------cen[%d]--------%n", i);
+                    printCEN(cen);
+                    i++;
+                }
+            }
+            zfs.close();
+        }
+    }
+
+    static void print(String fmt, Object... objs) {
+        System.out.printf(fmt, objs);
+    }
+
+    static void printLOC(Entry loc) {
+        print("  [%x, %x]%n", loc.startPos, loc.endPos);
+        print("  Signature   :     %8x%n", LOCSIG);
+        print("  Version     :         %4x    [%d.%d]%n",
+                  loc.version, loc. version/10, loc. version%10);
+        print("  Flag        :         %4x%n", loc.flag);
+        print("  Method      :         %4x%n", loc. method);
+        print("  LastMTime   :     %8x    [%tc]%n",
+                  loc.mtime, dosToJavaTime(loc.mtime));
+        print("  CRC         :     %8x%n", loc.crc);
+        print("  CSize       :     %8x%n", loc.csize);
+        print("  Size        :     %8x%n", loc.size);
+        print("  NameLength  :         %4x    [%s]%n",
+                  loc.nlen, new String(loc.name));
+        print("  ExtraLength :         %4x%n", loc.elen);
+        if (loc.hasZip64)
+            print(" *ZIP64*%n");
+    }
+
+    static void printCEN(Entry cen) {
+        print("  Signature   :     %08x%n", CENSIG);
+        print("  VerMadeby   :         %4x    [%d.%d]%n",
+                  cen.versionMade, cen.versionMade/10, cen.versionMade%10);
+        print("  VerExtract  :         %4x    [%d.%d]%n",
+                  cen.version, cen.version/10, cen.version%10);
+        print("  Flag        :         %4x%n", cen.flag);
+        print("  Method      :         %4x%n", cen.method);
+        print("  LastMTime   :     %8x    [%tc]%n",
+                  cen.mtime, dosToJavaTime(cen.mtime));
+        print("  CRC         :     %8x%n", cen.crc);
+        print("  CSize       :     %8x%n", cen.csize);
+        print("  Size        :     %8x%n", cen.size);
+        print("  NameLen     :         %4x    [%s]%n",
+                  cen.nlen, new String(cen.name));
+        print("  ExtraLen    :         %4x%n", cen.elen);
+        print("  CommentLen  :         %4x%n", cen.clen);
+        print("  DiskStart   :         %4x%n", cen.disk);
+        print("  Attrs       :         %4x%n", cen.attrs);
+        print("  AttrsEx     :     %8x%n", cen.attrsEx);
+        print("  LocOff      :     %8x%n", cen.locoff);
+        if (cen.hasZip64)
+            print(" *ZIP64*%n");
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipPath.java	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,964 @@
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Oracle nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.sun.nio.zipfs;
+
+import java.io.File;
+import java.io.FilterInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URI;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.SeekableByteChannel;
+import java.nio.file.*;
+import java.nio.file.DirectoryStream.Filter;
+import java.nio.file.spi.FileSystemProvider;
+import java.nio.file.attribute.BasicFileAttributeView;
+import java.nio.file.attribute.FileAttribute;
+import java.nio.file.attribute.FileAttributeView;
+import java.nio.file.attribute.FileTime;
+import java.util.*;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import static java.nio.file.StandardOpenOption.*;
+import static java.nio.file.StandardCopyOption.*;
+
+/**
+ *
+ * @author  Xueming Shen, Rajendra Gutupalli,Jaya Hangal
+ */
+
+public class ZipPath extends Path {
+
+    private final ZipFileSystem zfs;
+    private final byte[] path;
+    private volatile int[] offsets;
+    private int hashcode = 0;  // cached hashcode (created lazily)
+
+    ZipPath(ZipFileSystem zfs, byte[] path) {
+        this(zfs, path, false);
+    }
+
+    ZipPath(ZipFileSystem zfs, byte[] path, boolean normalized)
+    {
+        this.zfs = zfs;
+        if (normalized)
+            this.path = path;
+        else
+            this.path = normalize(path);
+    }
+
+    @Override
+    public ZipPath getRoot() {
+        if (this.isAbsolute())
+            return new ZipPath(zfs, new byte[]{path[0]});
+        else
+            return null;
+    }
+
+    @Override
+    public Path getName() {
+        initOffsets();
+        int count = offsets.length;
+        if (count == 0)
+            return null;  // no elements so no name
+        if (count == 1 && path[0] != '/')
+            return this;
+        int lastOffset = offsets[count-1];
+        int len = path.length - lastOffset;
+        byte[] result = new byte[len];
+        System.arraycopy(path, lastOffset, result, 0, len);
+        return new ZipPath(zfs, result);
+    }
+
+    @Override
+    public ZipPath getParent() {
+        initOffsets();
+        int count = offsets.length;
+        if (count == 0)    // no elements so no parent
+            return null;
+        int len = offsets[count-1] - 1;
+        if (len <= 0)      // parent is root only (may be null)
+            return getRoot();
+        byte[] result = new byte[len];
+        System.arraycopy(path, 0, result, 0, len);
+        return new ZipPath(zfs, result);
+    }
+
+    @Override
+    public int getNameCount() {
+        initOffsets();
+        return offsets.length;
+    }
+
+    @Override
+    public ZipPath getName(int index) {
+        initOffsets();
+        if (index < 0 || index >= offsets.length)
+            throw new IllegalArgumentException();
+        int begin = offsets[index];
+        int len;
+        if (index == (offsets.length-1))
+            len = path.length - begin;
+        else
+            len = offsets[index+1] - begin - 1;
+        // construct result
+        byte[] result = new byte[len];
+        System.arraycopy(path, begin, result, 0, len);
+        return new ZipPath(zfs, result);
+    }
+
+    @Override
+    public ZipPath subpath(int beginIndex, int endIndex) {
+        initOffsets();
+        if (beginIndex < 0 ||
+            beginIndex >=  offsets.length ||
+            endIndex > offsets.length ||
+            beginIndex >= endIndex)
+            throw new IllegalArgumentException();
+
+        // starting offset and length
+        int begin = offsets[beginIndex];
+        int len;
+        if (endIndex == offsets.length)
+            len = path.length - begin;
+        else
+            len = offsets[endIndex] - begin - 1;
+        // construct result
+        byte[] result = new byte[len];
+        System.arraycopy(path, begin, result, 0, len);
+        return new ZipPath(zfs, result);
+    }
+
+    @Override
+    public ZipPath toRealPath(boolean resolveLinks) throws IOException {
+        ZipPath realPath = new ZipPath(zfs, getResolvedPath());
+        realPath.checkAccess();
+        return realPath;
+    }
+
+    @Override
+    public boolean isHidden() {
+        return false;
+    }
+
+    @Override
+    public ZipPath toAbsolutePath() {
+        if (isAbsolute()) {
+            return this;
+        } else {
+            //add / bofore the existing path
+            byte[] defaultdir = zfs.getDefaultDir().path;
+            int defaultlen = defaultdir.length;
+            boolean endsWith = (defaultdir[defaultlen - 1] == '/');
+            byte[] t = null;
+            if (endsWith)
+                t = new byte[defaultlen + path.length];
+            else
+                t = new byte[defaultlen + 1 + path.length];
+            System.arraycopy(defaultdir, 0, t, 0, defaultlen);
+            if (!endsWith)
+                t[defaultlen++] = '/';
+            System.arraycopy(path, 0, t, defaultlen, path.length);
+            return new ZipPath(zfs, t, true);  // normalized
+        }
+    }
+
+    @Override
+    public URI toUri() {
+        String zfPath = zfs.toString();
+        if (File.separatorChar == '\\')  // replace all separators by '/'
+            zfPath = "/" + zfPath.replace("\\", "/");
+        try {
+            return new URI("zip", "",
+                           zfPath,
+                           zfs.getString(toAbsolutePath().path));
+        } catch (Exception ex) {
+            throw new AssertionError(ex);
+        }
+    }
+
+    private boolean equalsNameAt(ZipPath other, int index) {
+        int mbegin = offsets[index];
+        int mlen = 0;
+        if (index == (offsets.length-1))
+            mlen = path.length - mbegin;
+        else
+            mlen = offsets[index + 1] - mbegin - 1;
+        int obegin = other.offsets[index];
+        int olen = 0;
+        if (index == (other.offsets.length - 1))
+            olen = other.path.length - obegin;
+        else
+            olen = other.offsets[index + 1] - obegin - 1;
+        if (mlen != olen)
+            return false;
+        int n = 0;
+        while(n < mlen) {
+            if (path[mbegin + n] != other.path[obegin + n])
+                return false;
+            n++;
+        }
+        return true;
+    }
+
+    @Override
+    public Path relativize(Path other) {
+        final ZipPath o = checkPath(other);
+        if (o.equals(this))
+            return null;
+        if (/* this.getFileSystem() != o.getFileSystem() || */
+            this.isAbsolute() != o.isAbsolute()) {
+            throw new IllegalArgumentException();
+        }
+        int mc = this.getNameCount();
+        int oc = o.getNameCount();
+        int n = Math.min(mc, oc);
+        int i = 0;
+        while (i < n) {
+            if (!equalsNameAt(o, i))
+                break;
+            i++;
+        }
+        int dotdots = mc - i;
+        int len = dotdots * 3 - 1;
+        if (i < oc)
+            len += (o.path.length - o.offsets[i] + 1);
+        byte[] result = new byte[len];
+
+        int pos = 0;
+        while (dotdots > 0) {
+            result[pos++] = (byte)'.';
+            result[pos++] = (byte)'.';
+            if (pos < len)       // no tailing slash at the end
+                result[pos++] = (byte)'/';
+            dotdots--;
+        }
+        if (i < oc)
+            System.arraycopy(o.path, o.offsets[i],
+                             result, pos,
+                             o.path.length - o.offsets[i]);
+        return new ZipPath(getFileSystem(), result);
+    }
+
+    @Override
+    public ZipFileSystem getFileSystem() {
+        return zfs;
+    }
+
+    @Override
+    public boolean isAbsolute() {
+        return (this.path[0] == '/');
+    }
+
+    @Override
+    public ZipPath resolve(Path other) {
+        if (other == null)
+            return this;
+        final ZipPath o = checkPath(other);
+        if (o.isAbsolute())
+            return o;
+        byte[] resolved = null;
+        if (this.path[path.length - 1] == '/') {
+            resolved = new byte[path.length + o.path.length];
+            System.arraycopy(path, 0, resolved, 0, path.length);
+            System.arraycopy(o.path, 0, resolved, path.length, o.path.length);
+        } else {
+            resolved = new byte[path.length + 1 + o.path.length];
+            System.arraycopy(path, 0, resolved, 0, path.length);
+            resolved[path.length] = '/';
+            System.arraycopy(o.path, 0, resolved, path.length + 1, o.path.length);
+        }
+        return new ZipPath(zfs, resolved);
+    }
+
+    @Override
+    public ZipPath resolve(String other) {
+        return resolve(getFileSystem().getPath(other));
+    }
+
+    @Override
+    public boolean startsWith(Path other) {
+        final ZipPath o = checkPath(other);
+        if (o.isAbsolute() != this.isAbsolute())
+            return false;
+        final int oCount = o.getNameCount();
+        if (getNameCount() < oCount)
+            return false;
+        for (int i = 0; i < oCount; i++) {
+            if (!o.getName(i).equals(getName(i)))
+                return false;
+        }
+        return true;
+    }
+
+    @Override
+    public boolean endsWith(Path other) {
+        final ZipPath o = checkPath(other);
+        if (o.isAbsolute())
+            return this.isAbsolute() ? this.equals(o) : false;
+        int i = o.getNameCount();
+        int j = this.getNameCount();
+        if (j < i)
+            return false;
+        for (--i, --j; i >= 0; i--, j--) {
+            if (!o.getName(i).equals(this.getName(j)))
+                return false;
+        }
+        return true;
+    }
+
+    @Override
+    public Path normalize() {
+        byte[] resolved = getResolved();
+        if (resolved == path)    // no change
+            return this;
+        if (resolved.length == 0)
+            return null;
+        return new ZipPath(zfs, resolved, true);
+    }
+
+    private ZipPath checkPath(Path path) {
+        if (path == null)
+            throw new NullPointerException();
+        if (!(path instanceof ZipPath))
+            throw new ProviderMismatchException();
+        return (ZipPath) path;
+    }
+
+    // create offset list if not already created
+    private void initOffsets() {
+        if (offsets == null) {
+            int count, index;
+            // count names
+            count = 0;
+            index = 0;
+            while (index < path.length) {
+                byte c = path[index++];
+                if (c != '/') {
+                    count++;
+                    while (index < path.length && path[index] != '/')
+                        index++;
+                }
+            }
+            // populate offsets
+            int[] result = new int[count];
+            count = 0;
+            index = 0;
+            while (index < path.length) {
+                byte c = path[index];
+                if (c == '/') {
+                    index++;
+                } else {
+                    result[count++] = index++;
+                    while (index < path.length && path[index] != '/')
+                        index++;
+                }
+            }
+            synchronized (this) {
+                if (offsets == null)
+                    offsets = result;
+            }
+        }
+    }
+
+    // resolved path for locating zip entry inside the zip file,
+    // the result path does not contain ./ and .. components
+    private volatile byte[] resolved = null;
+    byte[] getResolvedPath() {
+        byte[] r = resolved;
+        if (r == null) {
+            if (isAbsolute())
+                r = getResolved();
+            else
+                r = toAbsolutePath().getResolvedPath();
+            if (r[0] == '/')
+                r = Arrays.copyOfRange(r, 1, r.length);
+            resolved = r;
+        }
+        return resolved;
+    }
+
+    // removes redundant slashs, replace "\" to zip separator "/"
+    // and check for invalid characters
+    private byte[] normalize(byte[] path) {
+        if (path.length == 0)
+            return path;
+        byte prevC = 0;
+        for (int i = 0; i < path.length; i++) {
+            byte c = path[i];
+            if (c == '\\')
+                return normalize(path, i);
+            if (c == (byte)'/' && prevC == '/')
+                return normalize(path, i - 1);
+            if (c == '\u0000')
+                throw new InvalidPathException(zfs.getString(path),
+                                               "Path: nul character not allowed");
+            prevC = c;
+        }
+        return path;
+    }
+
+    private byte[] normalize(byte[] path, int off) {
+        byte[] to = new byte[path.length];
+        int n = 0;
+        while (n < off) {
+            to[n] = path[n];
+            n++;
+        }
+        int m = n;
+        byte prevC = 0;
+        while (n < path.length) {
+            byte c = path[n++];
+            if (c == (byte)'\\')
+                c = (byte)'/';
+            if (c == (byte)'/' && prevC == (byte)'/')
+                continue;
+            if (c == '\u0000')
+                throw new InvalidPathException(zfs.getString(path),
+                                               "Path: nul character not allowed");
+            to[m++] = c;
+            prevC = c;
+        }
+        if (m > 1 && to[m - 1] == '/')
+            m--;
+        return (m == to.length)? to : Arrays.copyOf(to, m);
+    }
+
+    // Remove DotSlash(./) and resolve DotDot (..) components
+    private byte[] getResolved() {
+        if (path.length == 0)
+            return path;
+        for (int i = 0; i < path.length; i++) {
+            byte c = path[i];
+            if (c == (byte)'.')
+                return resolve0();
+        }
+        return path;
+    }
+
+    // TBD: performance, avoid initOffsets
+    private byte[] resolve0() {
+        byte[] to = new byte[path.length];
+        int nc = getNameCount();
+        int[] lastM = new int[nc];
+        int lastMOff = -1;
+        int m = 0;
+        for (int i = 0; i < nc; i++) {
+            int n = offsets[i];
+            int len = (i == offsets.length - 1)?
+                      (path.length - n):(offsets[i + 1] - n - 1);
+            if (len == 1 && path[n] == (byte)'.')
+                continue;
+            if (len == 2 && path[n] == '.' && path[n + 1] == '.') {
+                if (lastMOff >= 0) {
+                    m = lastM[lastMOff--];  // retreat
+                    continue;
+                }
+                if (path[0] == '/') {  // "/../xyz" skip
+                    if (m == 0)
+                        to[m++] = '/';
+                } else {               // "../xyz" -> "../xyz"
+                    if (m != 0 && to[m-1] != '/')
+                        to[m++] = '/';
+                    while (len-- > 0)
+                        to[m++] = path[n++];
+                }
+                continue;
+            }
+            if (m == 0 && path[0] == '/' ||   // absolute path
+                m != 0 && to[m-1] != '/') {   // not the first name
+                to[m++] = '/';
+            }
+            lastM[++lastMOff] = m;
+            while (len-- > 0)
+                to[m++] = path[n++];
+        }
+        if (m > 1 && to[m - 1] == '/')
+            m--;
+        return (m == to.length)? to : Arrays.copyOf(to, m);
+    }
+
+    @Override
+    public String toString() {
+        return zfs.getString(path);
+    }
+
+    @Override
+    public int hashCode() {
+        int h = hashcode;
+        if (h == 0)
+            hashcode = h = Arrays.hashCode(path);
+        return h;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        return obj != null &&
+               obj instanceof ZipPath &&
+               this.zfs == ((ZipPath)obj).zfs &&
+               compareTo((Path) obj) == 0;
+    }
+
+    @Override
+    public int compareTo(Path other) {
+        final ZipPath o = checkPath(other);
+        int len1 = this.path.length;
+        int len2 = o.path.length;
+
+        int n = Math.min(len1, len2);
+        byte v1[] = this.path;
+        byte v2[] = o.path;
+
+        int k = 0;
+        while (k < n) {
+            int c1 = v1[k] & 0xff;
+            int c2 = v2[k] & 0xff;
+            if (c1 != c2)
+                return c1 - c2;
+            k++;
+        }
+        return len1 - len2;
+    }
+
+    @Override
+    public Path createSymbolicLink(
+            Path target, FileAttribute<?>... attrs) throws IOException {
+        throw new UnsupportedOperationException("Not supported.");
+    }
+
+    @Override
+    public Path createLink(
+            Path existing) throws IOException {
+        throw new UnsupportedOperationException("Not supported.");
+    }
+
+    @Override
+    public Path readSymbolicLink() throws IOException {
+        throw new UnsupportedOperationException("Not supported.");
+    }
+
+    @Override
+    public Path createDirectory(FileAttribute<?>... attrs)
+        throws IOException
+    {
+        zfs.createDirectory(getResolvedPath(), attrs);
+        return this;
+    }
+
+    public final Path createFile(FileAttribute<?>... attrs)
+        throws IOException
+    {
+        OutputStream os = newOutputStream(CREATE_NEW, WRITE);
+        try {
+            os.close();
+        } catch (IOException x) {}
+        return this;
+    }
+
+    @Override
+    public InputStream newInputStream(OpenOption... options)
+            throws IOException {
+        if (options.length > 0) {
+            for (OpenOption opt : options) {
+                if (opt != READ)
+                    throw new UnsupportedOperationException("'" + opt + "' not allowed");
+            }
+        }
+        return zfs.newInputStream(getResolvedPath());
+    }
+
+    private static final DirectoryStream.Filter<Path> acceptAllFilter =
+        new DirectoryStream.Filter<Path>() {
+            @Override public boolean accept(Path entry) { return true; }
+        };
+
+    @Override
+    public final DirectoryStream<Path> newDirectoryStream() throws IOException {
+        return newDirectoryStream(acceptAllFilter);
+    }
+
+    @Override
+    public DirectoryStream<Path> newDirectoryStream(Filter<? super Path> filter)
+        throws IOException
+    {
+        return new ZipDirectoryStream(this, filter);
+    }
+
+    @Override
+    public final DirectoryStream<Path> newDirectoryStream(String glob)
+        throws IOException
+    {
+        // avoid creating a matcher if all entries are required.
+        if (glob.equals("*"))
+            return newDirectoryStream();
+
+        // create a matcher and return a filter that uses it.
+        final PathMatcher matcher = getFileSystem().getPathMatcher("glob:" + glob);
+        DirectoryStream.Filter<Path> filter = new DirectoryStream.Filter<Path>() {
+            @Override
+            public boolean accept(Path entry)  {
+                return matcher.matches(entry.getName());
+            }
+        };
+        return newDirectoryStream(filter);
+    }
+
+    @Override
+    public final void delete() throws IOException {
+        zfs.deleteFile(getResolvedPath(), true);
+    }
+
+    @Override
+    public final void deleteIfExists() throws IOException {
+        zfs.deleteFile(getResolvedPath(), false);
+    }
+
+    ZipFileAttributes getAttributes() throws IOException
+    {
+        ZipFileAttributes zfas = zfs.getFileAttributes(getResolvedPath());
+        if (zfas == null)
+            throw new NoSuchFileException(toString());
+        return zfas;
+    }
+
+    @Override
+    @SuppressWarnings("unchecked")
+    public <V extends FileAttributeView> V getFileAttributeView(Class<V> type,
+                                                                LinkOption... options)
+    {
+        return (V)ZipFileAttributeView.get(this, type);
+    }
+
+    @Override
+    public void setAttribute(String attribute,
+                             Object value,
+                             LinkOption... options)
+        throws IOException
+    {
+        String type = null;
+        String attr = null;
+        int colonPos = attribute.indexOf(':');
+        if (colonPos == -1) {
+            type = "basic";
+            attr = attribute;
+        } else {
+            type = attribute.substring(0, colonPos++);
+            attr = attribute.substring(colonPos);
+        }
+        ZipFileAttributeView view = ZipFileAttributeView.get(this, type);
+        if (view == null)
+            throw new UnsupportedOperationException("view <" + view + "> is not supported");
+        view.setAttribute(attr, value);
+    }
+
+    void setTimes(FileTime mtime, FileTime atime, FileTime ctime)
+        throws IOException
+    {
+        zfs.setTimes(getResolvedPath(), mtime, atime, ctime);
+    }
+
+    private Object getAttributesImpl(String attribute, boolean domap)
+        throws IOException
+    {
+        String view = null;
+        String attr = null;
+        int colonPos = attribute.indexOf(':');
+        if (colonPos == -1) {
+            view = "basic";
+            attr = attribute;
+        } else {
+            view = attribute.substring(0, colonPos++);
+            attr = attribute.substring(colonPos);
+        }
+        ZipFileAttributeView zfv = ZipFileAttributeView.get(this, view);
+        if (zfv == null) {
+            throw new UnsupportedOperationException("view not supported");
+        }
+        return zfv.getAttribute(attr, domap);
+    }
+
+    @Override
+    public Object getAttribute(String attribute, LinkOption... options)
+        throws IOException
+    {
+        return getAttributesImpl(attribute, false);
+    }
+
+    @Override
+    public Map<String,?> readAttributes(String attribute, LinkOption... options)
+        throws IOException
+    {
+        return (Map<String, ?>)getAttributesImpl(attribute, true);
+    }
+
+    @Override
+    public FileStore getFileStore() throws IOException {
+        // each ZipFileSystem only has one root (as requested for now)
+        if (exists())
+            return zfs.getFileStore(this);
+        throw new NoSuchFileException(zfs.getString(path));
+    }
+
+    @Override
+    public boolean isSameFile(Path other) throws IOException {
+        if (other == null ||
+            this.getFileSystem() != other.getFileSystem())
+            return false;
+        this.checkAccess();
+        other.checkAccess();
+        return Arrays.equals(this.getResolvedPath(),
+                             ((ZipPath)other).getResolvedPath());
+    }
+
+    public WatchKey register(
+            WatchService watcher,
+            WatchEvent.Kind<?>[] events,
+            WatchEvent.Modifier... modifiers) {
+        if (watcher == null || events == null || modifiers == null) {
+            throw new NullPointerException();
+        }
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public WatchKey register(WatchService watcher, WatchEvent.Kind<?>... events) {
+        return register(watcher, events, new WatchEvent.Modifier[0]);
+    }
+
+    @Override
+    public Iterator<Path> iterator() {
+        return new Iterator<Path>() {
+            private int i = 0;
+
+            @Override
+            public boolean hasNext() {
+                return (i < getNameCount());
+            }
+
+            @Override
+            public Path next() {
+                if (i < getNameCount()) {
+                    Path result = getName(i);
+                    i++;
+                    return result;
+                } else {
+                    throw new NoSuchElementException();
+                }
+            }
+
+            @Override
+            public void remove() {
+                throw new ReadOnlyFileSystemException();
+            }
+        };
+    }
+
+    @Override
+    public SeekableByteChannel newByteChannel(Set<? extends OpenOption> options,
+                                              FileAttribute<?>... attrs)
+        throws IOException
+    {
+        return zfs.newByteChannel(getResolvedPath(), options, attrs);
+    }
+
+
+    FileChannel newFileChannel(Set<? extends OpenOption> options,
+                               FileAttribute<?>... attrs)
+        throws IOException
+    {
+        return zfs.newFileChannel(getResolvedPath(), options, attrs);
+    }
+
+    @Override
+    public SeekableByteChannel newByteChannel(OpenOption... options)
+            throws IOException {
+        Set<OpenOption> set = new HashSet<OpenOption>(options.length);
+        Collections.addAll(set, options);
+        return newByteChannel(set);
+    }
+
+    @Override
+    public void checkAccess(AccessMode... modes) throws IOException {
+        boolean w = false;
+        boolean x = false;
+        for (AccessMode mode : modes) {
+            switch (mode) {
+                case READ:
+                    break;
+                case WRITE:
+                    w = true;
+                    break;
+                case EXECUTE:
+                    x = true;
+                    break;
+                default:
+                    throw new UnsupportedOperationException();
+            }
+        }
+        ZipFileAttributes attrs = zfs.getFileAttributes(getResolvedPath());
+        if (attrs == null && (path.length != 1 || path[0] != '/'))
+            throw new NoSuchFileException(toString());
+        if (w) {
+            if (zfs.isReadOnly())
+                throw new AccessDeniedException(toString());
+        }
+        if (x)
+            throw new AccessDeniedException(toString());
+
+    }
+
+    @Override
+    public boolean exists() {
+        if (path.length == 1 && path[0] == '/')
+            return true;
+        try {
+            return zfs.exists(getResolvedPath());
+        } catch (IOException x) {}
+        return false;
+    }
+
+    @Override
+    public boolean notExists() {
+        return !exists();
+    }
+
+
+    @Override
+    public OutputStream newOutputStream(OpenOption... options)
+        throws IOException
+    {
+        if (options.length == 0)
+            return zfs.newOutputStream(getResolvedPath(),
+                                       CREATE_NEW, WRITE);
+        return zfs.newOutputStream(getResolvedPath(), options);
+    }
+
+    @Override
+    public Path moveTo(Path target, CopyOption... options)
+        throws IOException
+    {
+        if (this.zfs.provider() == target.getFileSystem().provider() &&
+            this.zfs.getZipFile().isSameFile(((ZipPath)target).zfs.getZipFile()))
+        {
+            zfs.copyFile(true,
+                         getResolvedPath(),
+                         ((ZipPath)target).getResolvedPath(),
+                         options);
+        } else {
+            copyToTarget(target, options);
+            delete();
+        }
+        return target;
+    }
+
+    @Override
+    public Path copyTo(Path target, CopyOption... options)
+        throws IOException
+    {
+        if (this.zfs.provider() == target.getFileSystem().provider() &&
+            this.zfs.getZipFile().isSameFile(((ZipPath)target).zfs.getZipFile()))
+        {
+            zfs.copyFile(false,
+                         getResolvedPath(),
+                         ((ZipPath)target).getResolvedPath(),
+                         options);
+        } else {
+            copyToTarget(target, options);
+        }
+        return target;
+    }
+
+    private void copyToTarget(Path target, CopyOption... options)
+        throws IOException
+    {
+        boolean replaceExisting = false;
+        boolean copyAttrs = false;
+        for (CopyOption opt : options) {
+            if (opt == REPLACE_EXISTING)
+                replaceExisting = true;
+            else if (opt == COPY_ATTRIBUTES)
+                copyAttrs = false;
+        }
+        // attributes of source file
+        ZipFileAttributes zfas = getAttributes();
+        // check if target exists
+        boolean exists;
+        if (replaceExisting) {
+            try {
+                target.deleteIfExists();
+                exists = false;
+            } catch (DirectoryNotEmptyException x) {
+                exists = true;
+            }
+        } else {
+            exists = target.exists();
+        }
+        if (exists)
+            throw new FileAlreadyExistsException(target.toString());
+
+        if (zfas.isDirectory()) {
+            // create directory or file
+            target.createDirectory();
+        } else {
+            InputStream is = zfs.newInputStream(getResolvedPath());
+            try {
+                OutputStream os = target.newOutputStream();
+                try {
+                    byte[] buf = new byte[8192];
+                    int n = 0;
+                    while ((n = is.read(buf)) != -1) {
+                        os.write(buf, 0, n);
+                    }
+                } finally {
+                    os.close();
+                }
+            } finally {
+                is.close();
+            }
+        }
+        if (copyAttrs) {
+            BasicFileAttributeView view =
+                target.getFileAttributeView(BasicFileAttributeView.class);
+            try {
+                view.setTimes(zfas.lastModifiedTime(), null, null);
+            } catch (IOException x) {
+                // rollback?
+                try {
+                    target.delete();
+                } catch (IOException ignore) { }
+                throw x;
+            }
+        }
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/demo/nio/zipfs/com/sun/nio/zipfs/ZipUtils.java	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,289 @@
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Oracle nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.sun.nio.zipfs;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.Arrays;
+import java.util.Date;
+import java.util.regex.PatternSyntaxException;
+
+/**
+ *
+ * @author Xueming Shen
+ */
+
+class ZipUtils {
+
+    /*
+     * Writes a 16-bit short to the output stream in little-endian byte order.
+     */
+    public static void writeShort(OutputStream os, int v) throws IOException {
+        os.write((v >>> 0) & 0xff);
+        os.write((v >>> 8) & 0xff);
+    }
+
+    /*
+     * Writes a 32-bit int to the output stream in little-endian byte order.
+     */
+    public static void writeInt(OutputStream os, long v) throws IOException {
+        os.write((int)((v >>>  0) & 0xff));
+        os.write((int)((v >>>  8) & 0xff));
+        os.write((int)((v >>> 16) & 0xff));
+        os.write((int)((v >>> 24) & 0xff));
+    }
+
+    /*
+     * Writes a 64-bit int to the output stream in little-endian byte order.
+     */
+    public static void writeLong(OutputStream os, long v) throws IOException {
+        os.write((int)((v >>>  0) & 0xff));
+        os.write((int)((v >>>  8) & 0xff));
+        os.write((int)((v >>> 16) & 0xff));
+        os.write((int)((v >>> 24) & 0xff));
+        os.write((int)((v >>> 32) & 0xff));
+        os.write((int)((v >>> 40) & 0xff));
+        os.write((int)((v >>> 48) & 0xff));
+        os.write((int)((v >>> 56) & 0xff));
+    }
+
+    /*
+     * Writes an array of bytes to the output stream.
+     */
+    public static void writeBytes(OutputStream os, byte[] b)
+        throws IOException
+    {
+        os.write(b, 0, b.length);
+    }
+
+    /*
+     * Writes an array of bytes to the output stream.
+     */
+    public static void writeBytes(OutputStream os, byte[] b, int off, int len)
+        throws IOException
+    {
+        os.write(b, off, len);
+    }
+
+    /*
+     * Append a slash at the end, if it does not have one yet
+     */
+    public static byte[] toDirectoryPath(byte[] dir) {
+        if (dir.length != 0 && dir[dir.length - 1] != '/') {
+            dir = Arrays.copyOf(dir, dir.length + 1);
+            dir[dir.length - 1] = '/';
+        }
+        return dir;
+    }
+
+    /*
+     * Converts DOS time to Java time (number of milliseconds since epoch).
+     */
+    public static long dosToJavaTime(long dtime) {
+        Date d = new Date((int)(((dtime >> 25) & 0x7f) + 80),
+                          (int)(((dtime >> 21) & 0x0f) - 1),
+                          (int)((dtime >> 16) & 0x1f),
+                          (int)((dtime >> 11) & 0x1f),
+                          (int)((dtime >> 5) & 0x3f),
+                          (int)((dtime << 1) & 0x3e));
+        return d.getTime();
+    }
+
+    /*
+     * Converts Java time to DOS time.
+     */
+    public static long javaToDosTime(long time) {
+        Date d = new Date(time);
+        int year = d.getYear() + 1900;
+        if (year < 1980) {
+            return (1 << 21) | (1 << 16);
+        }
+        return (year - 1980) << 25 | (d.getMonth() + 1) << 21 |
+               d.getDate() << 16 | d.getHours() << 11 | d.getMinutes() << 5 |
+               d.getSeconds() >> 1;
+    }
+
+    private static final String regexMetaChars = ".^$+{[]|()";
+    private static final String globMetaChars = "\\*?[{";
+    private static boolean isRegexMeta(char c) {
+        return regexMetaChars.indexOf(c) != -1;
+    }
+    private static boolean isGlobMeta(char c) {
+        return globMetaChars.indexOf(c) != -1;
+    }
+    private static char EOL = 0;  //TBD
+    private static char next(String glob, int i) {
+        if (i < glob.length()) {
+            return glob.charAt(i);
+        }
+        return EOL;
+    }
+
+    /*
+     * Creates a regex pattern from the given glob expression.
+     *
+     * @throws  PatternSyntaxException
+     */
+    public static String toRegexPattern(String globPattern) {
+        boolean inGroup = false;
+        StringBuilder regex = new StringBuilder("^");
+
+        int i = 0;
+        while (i < globPattern.length()) {
+            char c = globPattern.charAt(i++);
+            switch (c) {
+                case '\\':
+                    // escape special characters
+                    if (i == globPattern.length()) {
+                        throw new PatternSyntaxException("No character to escape",
+                                globPattern, i - 1);
+                    }
+                    char next = globPattern.charAt(i++);
+                    if (isGlobMeta(next) || isRegexMeta(next)) {
+                        regex.append('\\');
+                    }
+                    regex.append(next);
+                    break;
+                case '/':
+                    regex.append(c);
+                    break;
+                case '[':
+                    // don't match name separator in class
+                    regex.append("[[^/]&&[");
+                    if (next(globPattern, i) == '^') {
+                        // escape the regex negation char if it appears
+                        regex.append("\\^");
+                        i++;
+                    } else {
+                        // negation
+                        if (next(globPattern, i) == '!') {
+                            regex.append('^');
+                            i++;
+                        }
+                        // hyphen allowed at start
+                        if (next(globPattern, i) == '-') {
+                            regex.append('-');
+                            i++;
+                        }
+                    }
+                    boolean hasRangeStart = false;
+                    char last = 0;
+                    while (i < globPattern.length()) {
+                        c = globPattern.charAt(i++);
+                        if (c == ']') {
+                            break;
+                        }
+                        if (c == '/') {
+                            throw new PatternSyntaxException("Explicit 'name separator' in class",
+                                    globPattern, i - 1);
+                        }
+                        // TBD: how to specify ']' in a class?
+                        if (c == '\\' || c == '[' ||
+                                c == '&' && next(globPattern, i) == '&') {
+                            // escape '\', '[' or "&&" for regex class
+                            regex.append('\\');
+                        }
+                        regex.append(c);
+
+                        if (c == '-') {
+                            if (!hasRangeStart) {
+                                throw new PatternSyntaxException("Invalid range",
+                                        globPattern, i - 1);
+                            }
+                            if ((c = next(globPattern, i++)) == EOL || c == ']') {
+                                break;
+                            }
+                            if (c < last) {
+                                throw new PatternSyntaxException("Invalid range",
+                                        globPattern, i - 3);
+                            }
+                            regex.append(c);
+                            hasRangeStart = false;
+                        } else {
+                            hasRangeStart = true;
+                            last = c;
+                        }
+                    }
+                    if (c != ']') {
+                        throw new PatternSyntaxException("Missing ']", globPattern, i - 1);
+                    }
+                    regex.append("]]");
+                    break;
+                case '{':
+                    if (inGroup) {
+                        throw new PatternSyntaxException("Cannot nest groups",
+                                globPattern, i - 1);
+                    }
+                    regex.append("(?:(?:");
+                    inGroup = true;
+                    break;
+                case '}':
+                    if (inGroup) {
+                        regex.append("))");
+                        inGroup = false;
+                    } else {
+                        regex.append('}');
+                    }
+                    break;
+                case ',':
+                    if (inGroup) {
+                        regex.append(")|(?:");
+                    } else {
+                        regex.append(',');
+                    }
+                    break;
+                case '*':
+                    if (next(globPattern, i) == '*') {
+                        // crosses directory boundaries
+                        regex.append(".*");
+                        i++;
+                    } else {
+                        // within directory boundary
+                        regex.append("[^/]*");
+                    }
+                    break;
+                case '?':
+                   regex.append("[^/]");
+                   break;
+                default:
+                    if (isRegexMeta(c)) {
+                        regex.append('\\');
+                    }
+                    regex.append(c);
+            }
+        }
+        if (inGroup) {
+            throw new PatternSyntaxException("Missing '}", globPattern, i - 1);
+        }
+        return regex.append('$').toString();
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/demo/zipfs/Basic.java	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,159 @@
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.nio.file.*;
+import java.nio.file.attribute.*;
+import java.nio.file.spi.FileSystemProvider;
+import java.util.*;
+import java.net.URI;
+import java.io.IOException;
+
+/**
+ * Basic test for zip provider
+ */
+
+public class Basic {
+    public static void main(String[] args) throws Exception {
+        Path zipfile = Paths.get(args[0]);
+
+        // Test: zip should should be returned in provider list
+        boolean found = false;
+
+        for (FileSystemProvider provider: FileSystemProvider.installedProviders()) {
+            if (provider.getScheme().equalsIgnoreCase("zip")) {
+                found = true;
+                break;
+            }
+        }
+        if (!found)
+            throw new RuntimeException("'zip' provider not installed");
+
+        // Test: FileSystems#newFileSystem(FileRef)
+        Map<String,?> env = new HashMap<String,Object>();
+        FileSystems.newFileSystem(zipfile, env, null).close();
+
+        // Test: FileSystems#newFileSystem(URI)
+        URI uri = URI.create("zip" + zipfile.toUri().toString().substring(4));
+        FileSystem fs = FileSystems.newFileSystem(uri, env, null);
+
+        // Test: exercise toUri method
+        String expected = uri.toString() + "#/foo";
+        String actual = fs.getPath("/foo").toUri().toString();
+        if (!actual.equals(expected)) {
+            throw new RuntimeException("toUri returned '" + actual +
+                "', expected '" + expected + "'");
+        }
+
+        // Test: exercise directory iterator and retrieval of basic attributes
+        Files.walkFileTree(fs.getPath("/"), new FileTreePrinter());
+
+        // Test: DirectoryStream
+        found = false;
+        DirectoryStream<Path> stream = fs.getPath("/").newDirectoryStream();
+        try {
+            for (Path entry: stream) {
+                found = entry.toString().equals("/META-INF/");
+                if (found) break;
+            }
+        } finally {
+            stream.close();
+        }
+
+        if (!found)
+            throw new RuntimeException("Expected file not found");
+
+        // Test: copy file from zip file to current (scratch) directory
+        Path source = fs.getPath("/META-INF/services/java.nio.file.spi.FileSystemProvider");
+        if (source.exists()) {
+            Path target = Paths.get(source.getName().toString());
+            source.copyTo(target, StandardCopyOption.REPLACE_EXISTING);
+            try {
+                long s1 = Attributes.readBasicFileAttributes(source).size();
+                long s2 = Attributes.readBasicFileAttributes(target).size();
+                if (s2 != s1)
+                    throw new RuntimeException("target size != source size");
+            } finally {
+                target.delete();
+            }
+        }
+
+        // Test: FileStore
+        FileStore store = fs.getPath("/").getFileStore();
+        if (!store.supportsFileAttributeView("basic"))
+            throw new RuntimeException("BasicFileAttributeView should be supported");
+
+        // Test: ClosedFileSystemException
+        fs.close();
+        if (fs.isOpen())
+            throw new RuntimeException("FileSystem should be closed");
+        try {
+            fs.getPath("/missing").checkAccess(AccessMode.READ);
+        } catch (ClosedFileSystemException x) { }
+    }
+
+    // FileVisitor that pretty prints a file tree
+    static class FileTreePrinter extends SimpleFileVisitor<Path> {
+        private int indent = 0;
+
+        private void indent() {
+            StringBuilder sb = new StringBuilder(indent);
+            for (int i=0; i<indent; i++) sb.append(" ");
+            System.out.print(sb);
+        }
+
+        @Override
+        public FileVisitResult preVisitDirectory(Path dir,
+                                                 BasicFileAttributes attrs)
+        {
+            if (dir.getName() != null) {
+                indent();
+                System.out.println(dir.getName() + "/");
+                indent++;
+            }
+            return FileVisitResult.CONTINUE;
+        }
+
+        @Override
+        public FileVisitResult visitFile(Path file,
+                                         BasicFileAttributes attrs)
+        {
+            indent();
+            System.out.print(file.getName());
+            if (attrs.isRegularFile())
+                System.out.format(" (%d)", attrs.size());
+            System.out.println();
+            return FileVisitResult.CONTINUE;
+        }
+
+        @Override
+        public FileVisitResult postVisitDirectory(Path dir, IOException exc)
+            throws IOException
+        {
+            if (exc != null)
+                super.postVisitDirectory(dir, exc);
+            if (dir.getName() != null)
+                indent--;
+            return FileVisitResult.CONTINUE;
+        }
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/demo/zipfs/PathOps.java	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,416 @@
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.nio.file.*;
+import java.net.*;
+import java.util.*;
+import java.io.IOException;
+
+/**
+ * Tests path operations for zip provider.
+ */
+
+public class PathOps {
+
+    static final java.io.PrintStream out = System.out;
+    static FileSystem fs;
+
+    private String input;
+    private Path path;
+    private Exception exc;
+
+    private PathOps(String s) {
+        out.println();
+        input = s;
+        try {
+            path = fs.getPath(s);
+            out.format("%s -> %s", s, path);
+        } catch (Exception x) {
+            exc = x;
+            out.format("%s -> %s", s, x);
+        }
+        out.println();
+    }
+
+    Path path() {
+        return path;
+    }
+
+    void fail() {
+        throw new RuntimeException("PathOps failed");
+    }
+
+    void checkPath() {
+        if (path == null) {
+            throw new InternalError("path is null");
+        }
+    }
+
+    void check(Object result, String expected) {
+        out.format("\tExpected: %s\n", expected);
+        out.format("\tActual: %s\n",  result);
+        if (result == null) {
+            if (expected == null) return;
+        } else {
+            // compare string representations
+            if (expected != null && result.toString().equals(expected.toString()))
+                return;
+        }
+        fail();
+    }
+
+    void check(Object result, boolean expected) {
+        check(result, Boolean.toString(expected));
+    }
+
+    PathOps root(String expected) {
+        out.println("check root");
+        checkPath();
+        check(path.getRoot(), expected);
+        return this;
+    }
+
+    PathOps parent(String expected) {
+        out.println("check parent");
+        checkPath();
+        check(path.getParent(), expected);
+        return this;
+    }
+
+    PathOps name(String expected) {
+        out.println("check name");
+        checkPath();
+        check(path.getName(), expected);
+        return this;
+    }
+
+    PathOps element(int index, String expected) {
+        out.format("check element %d\n", index);
+        checkPath();
+        check(path.getName(index), expected);
+        return this;
+    }
+
+    PathOps subpath(int startIndex, int endIndex, String expected) {
+        out.format("test subpath(%d,%d)\n", startIndex, endIndex);
+        checkPath();
+        check(path.subpath(startIndex, endIndex), expected);
+        return this;
+    }
+
+    PathOps starts(String prefix) {
+        out.format("test startsWith with %s\n", prefix);
+        checkPath();
+        Path s = fs.getPath(prefix);
+        check(path.startsWith(s), true);
+        return this;
+    }
+
+    PathOps notStarts(String prefix) {
+        out.format("test not startsWith with %s\n", prefix);
+        checkPath();
+        Path s = fs.getPath(prefix);
+        check(path.startsWith(s), false);
+        return this;
+    }
+
+    PathOps ends(String suffix) {
+        out.format("test endsWith %s\n", suffix);
+        checkPath();
+        Path s = fs.getPath(suffix);
+        check(path.endsWith(s), true);
+        return this;
+    }
+
+    PathOps notEnds(String suffix) {
+        out.format("test not endsWith %s\n", suffix);
+        checkPath();
+        Path s = fs.getPath(suffix);
+        check(path.endsWith(s), false);
+        return this;
+    }
+
+    PathOps absolute() {
+        out.println("check path is absolute");
+        checkPath();
+        check(path.isAbsolute(), true);
+        return this;
+    }
+
+    PathOps notAbsolute() {
+        out.println("check path is not absolute");
+        checkPath();
+        check(path.isAbsolute(), false);
+        return this;
+    }
+
+    PathOps resolve(String other, String expected) {
+        out.format("test resolve %s\n", other);
+        checkPath();
+        check(path.resolve(other), expected);
+        return this;
+    }
+
+    PathOps relativize(String other, String expected) {
+        out.format("test relativize %s\n", other);
+        checkPath();
+        Path that = fs.getPath(other);
+        check(path.relativize(that), expected);
+        return this;
+    }
+
+    PathOps normalize(String expected) {
+        out.println("check normalized path");
+        checkPath();
+        check(path.normalize(), expected);
+        return this;
+    }
+
+    PathOps string(String expected) {
+        out.println("check string representation");
+        checkPath();
+        check(path, expected);
+        return this;
+    }
+
+    PathOps invalid() {
+        if (!(exc instanceof InvalidPathException)) {
+            out.println("InvalidPathException not thrown as expected");
+            fail();
+        }
+        return this;
+    }
+
+    static PathOps test(String s) {
+        return new PathOps(s);
+    }
+
+    // -- PathOpss --
+
+    static void header(String s) {
+        out.println();
+        out.println();
+        out.println("-- " + s + " --");
+    }
+
+    static void doPathOpTests() {
+        header("Path operations");
+
+        // all components
+        test("/a/b/c")
+            .root("/")
+            .parent("/a/b")
+            .name("c");
+
+        // root component only
+        test("/")
+            .root("/")
+            .parent(null)
+            .name(null);
+
+        // no root component
+        test("a/b")
+            .root(null)
+            .parent("a")
+            .name("b");
+
+        // name component only
+        test("foo")
+            .root(null)
+            .parent(null)
+            .name("foo");
+
+        // startsWith
+        test("/")
+            .starts("/")
+            .notStarts("/foo");
+        test("/foo")
+            .starts("/")
+            .starts("/foo")
+            .notStarts("/f");
+        test("/foo/bar")
+            .starts("/")
+            .starts("/foo")
+            .starts("/foo/bar")
+            .notStarts("/f")
+            .notStarts("foo")
+            .notStarts("foo/bar");
+        test("foo")
+            .starts("foo")
+            .notStarts("f");
+        test("foo/bar")
+            .starts("foo")
+            .starts("foo/bar")
+            .notStarts("f")
+            .notStarts("/foo")
+            .notStarts("/foo/bar");
+
+        // endsWith
+        test("/")
+            .ends("/")
+            .notEnds("foo")
+            .notEnds("/foo");
+        test("/foo")
+            .ends("foo")
+            .ends("/foo")
+            .notEnds("/");
+        test("/foo/bar")
+            .ends("bar")
+            .ends("foo/bar")
+            .ends("/foo/bar")
+            .notEnds("/bar");
+        test("foo")
+            .ends("foo");
+        test("foo/bar")
+            .ends("bar")
+            .ends("foo/bar");
+
+        // elements
+        test("a/b/c")
+            .element(0,"a")
+            .element(1,"b")
+            .element(2,"c");
+
+        // isAbsolute
+        test("/")
+            .absolute();
+        test("/tmp")
+            .absolute();
+        test("tmp")
+            .notAbsolute();
+
+        // resolve
+        test("/tmp")
+            .resolve("foo", "/tmp/foo")
+            .resolve("/foo", "/foo");
+        test("tmp")
+            .resolve("foo", "tmp/foo")
+            .resolve("/foo", "/foo");
+
+        // relativize
+        test("/a/b/c")
+            .relativize("/a/b/c", null)
+            .relativize("/a/b/c/d/e", "d/e")
+            .relativize("/a/x", "../../x");
+
+        // normalize
+        test("/")
+            .normalize("/");
+        test("foo")
+            .normalize("foo");
+        test("/foo")
+            .normalize("/foo");
+        test(".")
+            .normalize(null);
+        test("..")
+            .normalize("..");
+        test("/..")
+            .normalize("/");
+        test("/../..")
+            .normalize("/");
+        test("foo/.")
+            .normalize("foo");
+        test("./foo")
+            .normalize("foo");
+        test("foo/..")
+            .normalize(null);
+        test("../foo")
+            .normalize("../foo");
+        test("../../foo")
+            .normalize("../../foo");
+        test("foo/bar/..")
+            .normalize("foo");
+        test("foo/bar/gus/../..")
+            .normalize("foo");
+        test("/foo/bar/gus/../..")
+            .normalize("/foo");
+
+        // invalid
+        test("foo\u0000bar")
+            .invalid();
+        test("\u0000foo")
+            .invalid();
+        test("bar\u0000")
+            .invalid();
+        test("//foo\u0000bar")
+            .invalid();
+        test("//\u0000foo")
+            .invalid();
+        test("//bar\u0000")
+            .invalid();
+
+        // normalization
+        test("//foo//bar")
+            .string("/foo/bar")
+            .root("/")
+            .parent("/foo")
+            .name("bar");
+    }
+
+    static void npes() {
+        header("NullPointerException");
+
+        Path path = fs.getPath("foo");
+
+        try {
+            path.resolve((String)null);
+            throw new RuntimeException("NullPointerException not thrown");
+        } catch (NullPointerException npe) {
+        }
+
+        try {
+            path.relativize(null);
+            throw new RuntimeException("NullPointerException not thrown");
+        } catch (NullPointerException npe) {
+        }
+
+        try {
+            path.compareTo(null);
+            throw new RuntimeException("NullPointerException not thrown");
+        } catch (NullPointerException npe) {
+        }
+
+        try {
+            path.startsWith(null);
+            throw new RuntimeException("NullPointerException not thrown");
+        } catch (NullPointerException npe) {
+        }
+
+        try {
+            path.endsWith(null);
+            throw new RuntimeException("NullPointerException not thrown");
+        } catch (NullPointerException npe) {
+        }
+
+    }
+
+    public static void main(String[] args) throws Throwable {
+
+        Path zipfile = Paths.get(args[0]);
+        Map<String,?> env = new HashMap<String,Object>();
+        fs = FileSystems.newFileSystem(zipfile, env, null);
+        npes();
+        doPathOpTests();
+        fs.close();
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/demo/zipfs/ZipFSTester.java	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,633 @@
+/*
+ * Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+import java.io.*;
+import java.nio.*;
+import java.nio.channels.*;
+import java.nio.file.*;
+import java.nio.file.attribute.*;
+import java.net.*;
+import java.util.*;
+
+import static java.nio.file.StandardOpenOption.*;
+import static java.nio.file.StandardCopyOption.*;
+
+/*
+ * Tests various zipfs operations.
+ */
+
+public class ZipFSTester {
+
+    public static void main(String[] args) throws Throwable {
+        FileSystem fs = null;
+        try {
+            fs = newZipFileSystem(Paths.get(args[0]), new HashMap<String, Object>());
+            test(fs);
+            test2(fs);   // more tests
+        } finally {
+            if (fs != null)
+                fs.close();
+        }
+    }
+
+    static void test(FileSystem fs)
+        throws Exception
+    {
+        Random rdm = new Random();
+
+        // clone a fs and test on it
+        Path tmpfsPath = getTempPath();
+        Map<String, Object> env = new HashMap<String, Object>();
+        env.put("createNew", true);
+        FileSystem fs0 = newZipFileSystem(tmpfsPath, env);
+        z2zcopy(fs, fs0, "/", 0);
+        fs0.close();                // sync to file
+
+        fs = newZipFileSystem(tmpfsPath, new HashMap<String, Object>());
+
+        try {
+            // prepare a src
+            Path src = getTempPath();
+            String tmpName = src.toString();
+            OutputStream os = src.newOutputStream();
+            byte[] bits = new byte[12345];
+            rdm.nextBytes(bits);
+            os.write(bits);
+            os.close();
+
+            // copyin
+            Path dst = getPathWithParents(fs, tmpName);
+            src.copyTo(dst);
+            checkEqual(src, dst);
+
+            // copy
+            Path dst2 = getPathWithParents(fs, "/xyz" + rdm.nextInt(100) +
+                                           "/efg" + rdm.nextInt(100) + "/foo.class");
+            dst.copyTo(dst2);
+            //dst.moveTo(dst2);
+            checkEqual(src, dst2);
+
+            // delete
+            dst.delete();
+            if (dst.exists())
+                throw new RuntimeException("Failed!");
+
+            // moveout
+            Path dst3 = Paths.get(tmpName + "_Tmp");
+            dst2.moveTo(dst3);
+            checkEqual(src, dst3);
+
+            // delete
+            if (dst2.exists())
+                throw new RuntimeException("Failed!");
+            dst3.delete();
+            if (dst3.exists())
+                throw new RuntimeException("Failed!");
+
+            // newInputStream on dir
+            Path parent = dst2.getParent();
+            try {
+                parent.newInputStream();
+                throw new RuntimeException("Failed");
+            } catch (FileSystemException e) {
+                e.printStackTrace();    // expected fse
+            }
+
+            // rmdirs
+            try {
+                rmdirs(parent);
+            } catch (IOException x) {
+                x.printStackTrace();
+            }
+
+            // newFileChannel() copy in, out and verify via fch
+            fchCopy(src, dst);    // in
+            checkEqual(src, dst);
+            Path tmp = Paths.get(tmpName + "_Tmp");
+            fchCopy(dst, tmp);   //  out
+            checkEqual(src, tmp);
+            tmp.delete();
+
+            // test channels
+            channel(fs, dst);
+            dst.delete();
+            src.delete();
+        } finally {
+            if (fs != null)
+                fs.close();
+            if (tmpfsPath.exists())
+                tmpfsPath.delete();
+        }
+    }
+
+    static void test2(FileSystem fs) throws Exception {
+
+        Path fs1Path = getTempPath();
+        Path fs2Path = getTempPath();
+        Path fs3Path = getTempPath();
+
+        if (fs1Path.exists())
+            fs1Path.delete();
+        if (fs2Path.exists())
+            fs2Path.delete();
+        if (fs3Path.exists())
+            fs3Path.delete();
+
+        // create a new filesystem, copy everything from fs
+        Map<String, Object> env = new HashMap<String, Object>();
+        env.put("createNew", true);
+        FileSystem fs0 = newZipFileSystem(fs1Path, env);
+
+        final FileSystem fs2 = newZipFileSystem(fs2Path, env);
+        final FileSystem fs3 = newZipFileSystem(fs3Path, env);
+
+        System.out.println("copy src: fs -> fs0...");
+        z2zcopy(fs, fs0, "/", 0);   // copy fs -> fs1
+        fs0.close();                // dump to file
+
+        System.out.println("open fs0 as fs1");
+        env = new HashMap<String, Object>();
+        final FileSystem fs1 = newZipFileSystem(fs1Path, env);
+
+        System.out.println("listing...");
+        final ArrayList<String> files = new ArrayList<>();
+        final ArrayList<String> dirs = new ArrayList<>();
+        list(fs1.getPath("/"), files, dirs);
+
+        Thread t0 = new Thread(new Runnable() {
+            public void run() {
+                List<String> list = new ArrayList<>(dirs);
+                Collections.shuffle(list);
+                for (String path : list) {
+                    try {
+                        z2zcopy(fs1, fs2, path, 0);
+                    } catch (Exception x) {
+                        x.printStackTrace();
+                    }
+                }
+            }
+
+        });
+
+        Thread t1 = new Thread(new Runnable() {
+            public void run() {
+                List<String> list = new ArrayList<>(dirs);
+                Collections.shuffle(list);
+                for (String path : list) {
+                    try {
+                        z2zcopy(fs1, fs2, path, 1);
+                    } catch (Exception x) {
+                        x.printStackTrace();
+                    }
+                }
+            }
+
+        });
+
+        Thread t2 = new Thread(new Runnable() {
+            public void run() {
+                List<String> list = new ArrayList<>(dirs);
+                Collections.shuffle(list);
+                for (String path : list) {
+                    try {
+                        z2zcopy(fs1, fs2, path, 2);
+                    } catch (Exception x) {
+                        x.printStackTrace();
+                    }
+                }
+            }
+
+        });
+
+        Thread t3 = new Thread(new Runnable() {
+            public void run() {
+                List<String> list = new ArrayList<>(files);
+                Collections.shuffle(list);
+                while (!list.isEmpty()) {
+                    Iterator<String> itr = list.iterator();
+                    while (itr.hasNext()) {
+                        String path = itr.next();
+                        try {
+                            if (fs2.getPath(path).exists()) {
+                                z2zmove(fs2, fs3, path);
+                                itr.remove();
+                            }
+                        } catch (FileAlreadyExistsException x){
+                            itr.remove();
+                        } catch (Exception x) {
+                            x.printStackTrace();
+                        }
+                    }
+                }
+            }
+
+        });
+
+        System.out.println("copying/removing...");
+        t0.start(); t1.start(); t2.start(); t3.start();
+        t0.join(); t1.join(); t2.join(); t3.join();
+
+        System.out.println("closing: fs1, fs2");
+        fs1.close();
+        fs2.close();
+
+        int failed = 0;
+        System.out.println("checkEqual: fs vs fs3");
+        for (String path : files) {
+            try {
+                checkEqual(fs.getPath(path), fs3.getPath(path));
+            } catch (IOException x) {
+                //x.printStackTrace();
+                failed++;
+            }
+        }
+        System.out.println("closing: fs3");
+        fs3.close();
+
+        System.out.println("opening: fs3 as fs4");
+        FileSystem fs4 = newZipFileSystem(fs3Path, env);
+
+
+        ArrayList<String> files2 = new ArrayList<>();
+        ArrayList<String> dirs2 = new ArrayList<>();
+        list(fs4.getPath("/"), files2, dirs2);
+
+        System.out.println("checkEqual: fs vs fs4");
+        for (String path : files2) {
+            checkEqual(fs.getPath(path), fs4.getPath(path));
+        }
+        System.out.println("walking: fs4");
+        walk(fs4.getPath("/"));
+        System.out.println("closing: fs4");
+        fs4.close();
+
+        System.out.printf("failed=%d%n", failed);
+
+        fs1Path.delete();
+        fs2Path.delete();
+        fs3Path.delete();
+    }
+
+    private static FileSystem newZipFileSystem(Path path, Map<String, ?> env)
+        throws IOException
+    {
+        return FileSystems.newFileSystem(
+                   URI.create("zip" +
+                               path.toUri().toString().substring(4)),
+                   env,
+                   null);
+    }
+
+    private static Path getTempPath() throws IOException
+    {
+        File tmp = File.createTempFile("testzipfs_", "zip");
+        tmp.delete();    // we need a clean path, no file
+        return tmp.toPath();
+    }
+
+    private static void list(Path path, List<String> files, List<String> dirs )
+        throws IOException
+    {
+        if (Attributes.readBasicFileAttributes(path).isDirectory()) {
+            DirectoryStream<Path> ds = path.newDirectoryStream();
+            for (Path child : ds)
+                list(child, files, dirs);
+            ds.close();
+            dirs.add(path.toString());
+        } else {
+            files.add(path.toString());
+        }
+    }
+
+    private static void z2zcopy(FileSystem src, FileSystem dst, String path,
+                                int method)
+        throws IOException
+    {
+        Path srcPath = src.getPath(path);
+        Path dstPath = dst.getPath(path);
+
+        if (Boolean.TRUE.equals(srcPath.getAttribute("isDirectory"))) {
+            if (!dstPath.exists()) {
+                try {
+                    mkdirs(dstPath);
+                } catch (FileAlreadyExistsException x) {}
+            }
+            DirectoryStream<Path> ds = srcPath.newDirectoryStream();
+            for (Path child : ds) {
+                z2zcopy(src, dst,
+                        path + (path.endsWith("/")?"":"/") + child.getName(),
+                        method);
+            }
+            ds.close();
+        } else {
+            try {
+                if (dstPath.exists())
+                    return;
+                switch (method) {
+                case 0:
+                    srcPath.copyTo(dstPath);
+                    break;
+                case 1:
+                    chCopy(srcPath, dstPath);
+                    break;
+                case 2:
+                    //fchCopy(srcPath, dstPath);
+                    streamCopy(srcPath, dstPath);
+                    break;
+                }
+            } catch (FileAlreadyExistsException x) {}
+        }
+    }
+
+    private static void z2zmove(FileSystem src, FileSystem dst, String path)
+        throws IOException
+    {
+        Path srcPath = src.getPath(path);
+        Path dstPath = dst.getPath(path);
+
+        if (Boolean.TRUE.equals(srcPath.getAttribute("isDirectory"))) {
+            if (!dstPath.exists())
+                mkdirs(dstPath);
+            DirectoryStream<Path> ds = srcPath.newDirectoryStream();
+            for (Path child : ds) {
+                z2zmove(src, dst,
+                        path + (path.endsWith("/")?"":"/") + child.getName());
+            }
+            ds.close();
+        } else {
+            //System.out.println("moving..." + path);
+            Path parent = dstPath.getParent();
+            if (parent != null && parent.notExists())
+                mkdirs(parent);
+            srcPath.moveTo(dstPath);
+        }
+    }
+
+    private static void walk(Path path) throws IOException
+    {
+        Files.walkFileTree(
+            path,
+            new SimpleFileVisitor<Path>() {
+                private int indent = 0;
+                private void indent() {
+                    int n = 0;
+                    while (n++ < indent)
+                        System.out.printf(" ");
+                }
+
+                @Override
+                public FileVisitResult visitFile(Path file,
+                                                 BasicFileAttributes attrs)
+                {
+                    indent();
+                    System.out.printf("%s%n", file.getName().toString());
+                    return FileVisitResult.CONTINUE;
+                }
+
+                @Override
+                public FileVisitResult preVisitDirectory(Path dir,
+                                                         BasicFileAttributes attrs)
+                {
+                    indent();
+                    System.out.printf("[%s]%n", dir.toString());
+                    indent += 2;
+                    return FileVisitResult.CONTINUE;
+                }
+
+                @Override
+                public FileVisitResult postVisitDirectory(Path dir,
+                                                          IOException ioe)
+                    throws IOException
+                {
+                    indent -= 2;
+                    return FileVisitResult.CONTINUE;
+                }
+        });
+    }
+
+    private static void mkdirs(Path path) throws IOException {
+        path = path.toAbsolutePath();
+        Path parent = path.getParent();
+        if (parent != null) {
+            if (parent.notExists())
+                mkdirs(parent);
+        }
+        path.createDirectory();
+    }
+
+    private static void rmdirs(Path path) throws IOException {
+        while (path != null && path.getNameCount() != 0) {
+            path.delete();
+            path = path.getParent();
+        }
+    }
+
+    // check the content of two paths are equal
+    private static void checkEqual(Path src, Path dst) throws IOException
+    {
+        //System.out.printf("checking <%s> vs <%s>...%n",
+        //                  src.toString(), dst.toString());
+
+        //streams
+        InputStream isSrc = src.newInputStream();
+        InputStream isDst = dst.newInputStream();
+        byte[] bufSrc = new byte[8192];
+        byte[] bufDst = new byte[8192];
+
+        try {
+            int nSrc = 0;
+            while ((nSrc = isSrc.read(bufSrc)) != -1) {
+                int nDst = 0;
+                while (nDst < nSrc) {
+                    int n = isDst.read(bufDst, nDst, nSrc - nDst);
+                    if (n == -1) {
+                        System.out.printf("checking <%s> vs <%s>...%n",
+                                          src.toString(), dst.toString());
+                        throw new RuntimeException("CHECK FAILED!");
+                    }
+                    nDst += n;
+                }
+                while (--nSrc >= 0) {
+                    if (bufSrc[nSrc] != bufDst[nSrc]) {
+                        System.out.printf("checking <%s> vs <%s>...%n",
+                                          src.toString(), dst.toString());
+                        throw new RuntimeException("CHECK FAILED!");
+                    }
+                    nSrc--;
+                }
+            }
+        } finally {
+            isSrc.close();
+            isDst.close();
+        }
+
+        // channels
+        SeekableByteChannel chSrc = src.newByteChannel();
+        SeekableByteChannel chDst = dst.newByteChannel();
+        if (chSrc.size() != chDst.size()) {
+            System.out.printf("src[%s].size=%d, dst[%s].size=%d%n",
+                              chSrc.toString(), chSrc.size(),
+                              chDst.toString(), chDst.size());
+            throw new RuntimeException("CHECK FAILED!");
+        }
+        ByteBuffer bbSrc = ByteBuffer.allocate(8192);
+        ByteBuffer bbDst = ByteBuffer.allocate(8192);
+
+        try {
+            int nSrc = 0;
+            while ((nSrc = chSrc.read(bbSrc)) != -1) {
+                int nDst = chDst.read(bbDst);
+                if (nSrc != nDst) {
+                    System.out.printf("checking <%s> vs <%s>...%n",
+                                      src.toString(), dst.toString());
+                    throw new RuntimeException("CHECK FAILED!");
+                }
+                while (--nSrc >= 0) {
+                    if (bbSrc.get(nSrc) != bbDst.get(nSrc)) {
+                        System.out.printf("checking <%s> vs <%s>...%n",
+                                          src.toString(), dst.toString());
+                        throw new RuntimeException("CHECK FAILED!");
+                    }
+                    nSrc--;
+                }
+                bbSrc.flip();
+                bbDst.flip();
+            }
+        } catch (IOException x) {
+            x.printStackTrace();
+        } finally {
+            chSrc.close();
+            chDst.close();
+        }
+    }
+
+    private static void fchCopy(Path src, Path dst) throws IOException
+    {
+        Set<OpenOption> read = new HashSet<>();
+        read.add(READ);
+        Set<OpenOption> openwrite = new HashSet<>();
+        openwrite.add(CREATE_NEW);
+        openwrite.add(WRITE);
+
+        FileChannel srcFc = src.getFileSystem()
+                               .provider()
+                               .newFileChannel(src, read);
+        FileChannel dstFc = dst.getFileSystem()
+                               .provider()
+                               .newFileChannel(dst, openwrite);
+
+        try {
+            ByteBuffer bb = ByteBuffer.allocate(8192);
+            while (srcFc.read(bb) >= 0) {
+                bb.flip();
+                dstFc.write(bb);
+                bb.clear();
+            }
+        } finally {
+            srcFc.close();
+            dstFc.close();
+        }
+    }
+
+    private static void chCopy(Path src, Path dst) throws IOException
+    {
+        Set<OpenOption> read = new HashSet<>();
+        read.add(READ);
+        Set<OpenOption> openwrite = new HashSet<>();
+        openwrite.add(CREATE_NEW);
+        openwrite.add(WRITE);
+
+        SeekableByteChannel srcCh = src.newByteChannel(read);
+        SeekableByteChannel dstCh = dst.newByteChannel(openwrite);
+
+        try {
+            ByteBuffer bb = ByteBuffer.allocate(8192);
+            while (srcCh.read(bb) >= 0) {
+                bb.flip();
+                dstCh.write(bb);
+                bb.clear();
+            }
+        } finally {
+            srcCh.close();
+            dstCh.close();
+        }
+    }
+
+    private static void streamCopy(Path src, Path dst) throws IOException
+    {
+        InputStream isSrc = src.newInputStream();
+        OutputStream osDst = dst.newOutputStream();
+        byte[] buf = new byte[8192];
+        try {
+            int n = 0;
+            while ((n = isSrc.read(buf)) != -1) {
+                osDst.write(buf, 0, n);
+            }
+        } finally {
+            isSrc.close();
+            osDst.close();
+        }
+    }
+
+    static void channel(FileSystem fs, Path path)
+        throws Exception
+    {
+        System.out.println("test ByteChannel...");
+        SeekableByteChannel sbc = path.newByteChannel();
+        Set<OpenOption> read = new HashSet<>();
+        read.add(READ);
+        System.out.printf("   sbc[0]: pos=%d, size=%d%n", sbc.position(), sbc.size());
+        ByteBuffer bb = ByteBuffer.allocate((int)sbc.size());
+        int n = sbc.read(bb);
+        System.out.printf("   sbc[1]: read=%d, pos=%d, size=%d%n",
+                          n, sbc.position(), sbc.size());
+        ByteBuffer bb2 = ByteBuffer.allocate((int)sbc.size());
+        int N = 120;
+        sbc.close();
+
+        // sbc.position(pos) is not supported in current version
+        // try the FileChannel
+        sbc = fs.provider().newFileChannel(path, read);
+        sbc.position(N);
+        System.out.printf("   sbc[2]: pos=%d, size=%d%n",
+                          sbc.position(), sbc.size());
+        bb2.limit(100);
+        n = sbc.read(bb2);
+        System.out.printf("   sbc[3]: read=%d, pos=%d, size=%d%n",
+                          n, sbc.position(), sbc.size());
+        System.out.printf("   sbc[4]: bb[%d]=%d, bb1[0]=%d%n",
+                          N, bb.get(N) & 0xff, bb2.get(0) & 0xff);
+        sbc.close();
+    }
+
+    // create parents if does not exist
+    static Path getPathWithParents(FileSystem fs, String name)
+        throws Exception
+    {
+        Path path = fs.getPath(name);
+        Path parent = path.getParent();
+        if (parent != null && parent.notExists())
+            mkdirs(parent);
+        return path;
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/demo/zipfs/basic.sh	Fri Oct 08 21:33:28 2010 -0700
@@ -0,0 +1,73 @@
+#
+# Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+# 
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.
+# 
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+# 
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+# 
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+# @test
+# @bug 6990846
+# @summary Test ZipFileSystem demo
+# @build Basic PathOps ZipFSTester
+# @run shell basic.sh
+
+if [ -z "${TESTJAVA}" ]; then
+    echo "Test must be run with jtreg"
+    exit 0
+fi
+
+ZIPFS="${TESTJAVA}/demo/nio/zipfs/zipfs.jar"
+if [ ! -r "${ZIPFS}" ]; then
+    echo "${ZIPFS} not found"
+    exit 0
+fi
+
+OS=`uname -s`
+case "$OS" in
+    Windows_* )
+        CLASSPATH="${TESTCLASSES};${ZIPFS}"
+        ;;
+    * )
+        CLASSPATH="${TESTCLASSES}:${ZIPFS}"
+        ;;
+esac
+export CLASSPATH
+
+failures=0
+
+go() {
+    echo ""
+    ${TESTJAVA}/bin/java $1 $2 $3 2>&1
+    if [ $? != 0 ]; then failures=`expr $failures + 1`; fi
+}
+
+# Run the tests
+
+go Basic "${ZIPFS}"
+go PathOps "${ZIPFS}"
+go ZipFSTester "${ZIPFS}"
+
+#
+# Results
+#
+
+if [ $failures -gt 0 ];
+then echo "$failures tests failed";
+else echo "All tests passed";
+fi
+exit $failures