llvm-gcc-4.2/libjava/classpath/org/omg/PortableServer/_ServantLocatorStub.java

/* _ServantLocatorStub.java --
   Copyright (C) 2005 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
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any later version.

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General Public License for more details.

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02110-1301 USA.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
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As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
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exception statement from your version. */


package org.omg.PortableServer;

import org.omg.CORBA.portable.ObjectImpl;
import org.omg.PortableServer.ServantLocatorPackage.CookieHolder;

import java.io.Serializable;

/**
 * <p>The ServantLocator stub is an optional base for the
 * servant locators. This stub cannot accept remote invocations, as
 * methods in {@link ServantLocatorOperations} take POA as one of parameters.
 * Both JDK 1.5 API and OMG specifies that POA is a local object that must not
 * be transferred to the remote invocation target.
 * </p><p>
 * You do not need to derive your servant locator from this stub,
 * it is enough to implement the {@link ServantLocator} interface.
 * But you may choose to do this if you need its functional
 * {@link #_ids()} method or want to keep default behavior during per-
 * or post- invokcations.
 * </p>
 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
 */
public class _ServantLocatorStub
  extends ObjectImpl
  implements ServantLocator, Serializable
{
  /**
   * Use serialVersionUID (v1.4) for interoperability.
   */
  private static final long serialVersionUID = -2374963516905770111L;

  /**
   * This the purpose of this field is undocumented up till 1.5 java API
   * inclusive.
   */
  public static final Class _opsClass = ServantLocatorOperations.class;

  /**
   * The package private string, used as a parameter for
   * the throws NullPointerExceptions in both servant locator and activator
   * stubs.
   */
  static final String OVERRIDE = "Override this method to get functionality.";

  /**
   * Return the array of repository ids for this object, stating that it is
   * both Servant locator and Servant manager.
   *
   * @return { "IDL:omg.org/PortableServer/ServantLocator:1.0",
   *           "IDL:omg.org/PortableServer/ServantManager:1.0" }, always.
   */
  public String[] _ids()
  {
    return new String[]
           {
             "IDL:omg.org/PortableServer/ServantLocator:1.0",
             "IDL:omg.org/PortableServer/ServantManager:1.0"
           };
  }

  /**
   * It is your responsibility to take the preinvoke actions, if any,
   * and also supply an appropriate servant for the current invocation.
   *
   * The default method instructs POA that the servant cannot be
   * provided by locator. The OBJ_ADAPTER exception will be
   * thrown by POA, unless it uses the available default servant for all
   * invocations.
   *
   * @specnote in GNU Classpath, returning null means that the
   * locator does not supply the servant.
   *
   * @see ServantLocatorOperations#preinvoke
   */
  public Servant preinvoke(byte[] Object_id, POA poa, String method,
                           CookieHolder cookie
                          )
                    throws ForwardRequest
  {
    return null;
  }

  /**
   * It is your responsibility to take the postinvoke actions, if any,
   * by overriding this method. The default method does nothing.
   *
   * @see ServantLocatorOperations#postinvoke
   */
  public void postinvoke(byte[] Object_id, POA poa, String method,
                         Object cookie, Servant servant
                        )
  {
  }
}