gcc/libjava/classpath/org/omg/PortableServer/ServantLocatorPOA.java

/* ServantLocatorPOA.java --
   Copyright (C) 2005, 2006 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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General Public License for more details.

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02110-1301 USA.

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permission to link this library with independent modules to produce an
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package org.omg.PortableServer;

import gnu.CORBA.Poa.gnuServantObject;

import org.omg.CORBA.NO_IMPLEMENT;
import org.omg.CORBA.ORB;
import org.omg.CORBA.SystemException;
import org.omg.CORBA.portable.InputStream;
import org.omg.CORBA.portable.InvokeHandler;
import org.omg.CORBA.portable.OutputStream;
import org.omg.CORBA.portable.ResponseHandler;
import org.omg.PortableServer.ServantLocatorPackage.CookieHolder;

/**
 * <p>The ServantLocator stub is an optional base for the
 * servant locators. It cannot serve 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 org.omg.PortableServer.ServantActivatorPOA.delegator#_ids()}
 * method or want to keep default behaviour during pre- or post- invokcations.
 * </p>
 * @author Audrius Meskauskas, Lithuania (AudriusA@Bioinformatics.org)
 */
public abstract class ServantLocatorPOA
  extends Servant
  implements ServantLocatorOperations, InvokeHandler
{
  /**
   * Used to access the outer class in the nested classes.
   */
  final ServantLocatorPOA THIS = this;

  /**
   * Our implementation will not call this method. After setting your
   * manager to POA, it will call incarnate and etherialize directly.
   */
  public OutputStream _invoke(String method, InputStream input,
                              ResponseHandler handler
                             )
                       throws SystemException
  {
    throw new NO_IMPLEMENT();
  }

  /**
   * Returns an array of interfaces, supported by the servant locator.
   */
  public String[] _all_interfaces(POA poa, byte[] Object_Id)
  {
    return new _ServantLocatorStub()._ids();
  }

  /**
   * Return the complete instance of the servant activator, based on
   * the current class (ServantActivatorPOA or derived).
   */
  public ServantLocator _this()
  {
    return new delegator(this);
  }

  /**
   * Return the complete instance of the servant activator, based on
   * the current class (ServantActivatorPOA or derived).
   */
  public ServantLocator _this(ORB orb)
  {
    return new delegator(this);
  }

  /**
   * This class is used to support _this.
   */
  class delegator
    extends gnuServantObject
    implements ServantLocator
  {
    delegator(Servant s)
    {
      super(s, new byte[ 0 ], null, null);
    }

    public Servant preinvoke(byte[] Object_Id, POA poa, String method,
                             CookieHolder cookie_holder
                            )
                      throws org.omg.PortableServer.ForwardRequest
    {
      return THIS.preinvoke(Object_Id, poa, method, cookie_holder);
    }

    public void postinvoke(byte[] Object_Id, POA poa, String method,
                           java.lang.Object cookie, Servant servant
                          )
    {
      THIS.postinvoke(Object_Id, poa, method, cookie, servant);
    }

    public String[] _ids()
    {
      return THIS._all_interfaces(null, null);
    }
  }
}