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Provides a mechanism to register ORB hooks through which ORB services
can intercept the normal flow of execution of the ORB.

<h2>Interceptor Types</h2>
There are currently three types of interceptors that can be registered:
<ul>
  <li>{@link org.omg.PortableInterceptor.IORInterceptor IORInterceptor} - 
      Used to establish tagged components in the profiles within an IOR.</li>
  <li>{@link org.omg.PortableInterceptor.ClientRequestInterceptor 
ClientRequestInterceptor} - 
      Intercepts the flow of a request/reply sequence through the ORB on 
      the <i>client</i> side.</li>
  <li>{@link org.omg.PortableInterceptor.ServerRequestInterceptor 
ServerRequestInterceptor} - 
      Intercepts the flow of a request/reply sequence through the ORB on 
      the <i>server</i> side.</li>
</ul>
See the javadocs for class <code>
{@link org.omg.PortableInterceptor.ORBInitializer ORBInitializer}</code> 
for how to go about registering interceptors.

<a id="unimpl"></a>
<h2>Known limitations / unimplemented methods in package 
<code>org.omg.PortableInterceptor</code></h2>

<ul>
  <li>
    <code><b>RequestInfo</b></code>
    <ul>
      <li><code><b>sync_scope()</b></code>: Always returns SYNC_WITH_TRANSPORT</li>
      <li><code><b>arguments()</b></code>: Only supported for DII/DSI calls</li>
      <li><code><b>exceptions()</b></code>: Only supported for DII calls on client side.  
          Not supported on server-side.</li>
      <li><code><b>contexts()</b></code>: Only supported for DII calls on client side.
          Not supported on server-side since our ORB does not send contexts.
          </li>
      <li><code><b>operation_context()</b></code>: Only supported for DII calls 
          on client side.  Not supported on server-side since ORB 
          does not send contexts.</li>
      <li><code><b>result()</b></code>: Only supported for DII/DSI calls</li>
    </ul>
  </li>
  <li>
    <code><b>ClientRequestInfo</b></code>
    <ul>
      <li><code><b>received_exception_id()</b></code>: Always returns null in the 
          DII case</li>
      <li><code><b>get_request_policy(int type)</b></code>: Not implemented.</li>
    </ul>
  </li>
  <li>
    <code><b>ServerRequestInfo</b></code>
    <ul>
      <li><code><b>sending_exception()</b></code>: Does not support user exceptions on 
          the server side in non-DSI case.</li>
    </ul>
  </li>
</ul>

<h2>Package Specification</h2>
<P>For a precise list of supported sections of official OMG specifications with which 
the Java[tm] Platform, Standard Edition 6 complies, see <A 
HREF="../CORBA/doc-files/compliance.html">Official Specifications for CORBA 
support in Java SE 6</A>. 

@since 1.4
<br>
@serial exclude
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