gcc/libjava/classpath/java/rmi/server/UnicastRemoteObject.java

/* UnicastRemoteObject.java --
   Copyright (c) 1996, 1997, 1998, 1999, 2002, 2003, 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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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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package java.rmi.server;

import gnu.java.rmi.server.UnicastServerRef;

import java.rmi.NoSuchObjectException;
import java.rmi.Remote;
import java.rmi.RemoteException;

/**
 * This class obtains stub that communicates with the remote object. 
 */
public class UnicastRemoteObject extends RemoteServer
{
  /**
   * Use SVUID for interoperability.
   */
  private static final long serialVersionUID = 4974527148936298033L;

  //The following serialized fields are from Java API Documentation
  // "Serialized form"
  
  /**
   * The port, on that the created remote object becomes available,
   * zero meaning the anonymous port.
   */
  private int port;
  
  /**
   * The client socket factory for producing client sockets, used by this
   * object.
   */
  private RMIClientSocketFactory csf;
  
  /**
   * The server socket factory for producing server sockets, used by this
   * object.
   */
  private RMIServerSocketFactory ssf;

  /**
   * Create and export new remote object without specifying the port value.
   * 
   * @throws RemoteException if the attempt to export the object failed.
   */
  protected UnicastRemoteObject()
    throws RemoteException
  {
	this(0);
  }
  
  /**
   * Create and export the new remote object, making it available at the
   * given port, local host.
   * 
   * @param port the port, on that the object should become available.
   * Zero means anonymous port.
   * 
   * @throws RemoteException if the attempt to export the object failed.
   */
  protected UnicastRemoteObject(int port)
    throws RemoteException
  {
	this(port, RMISocketFactory.getSocketFactory(),
         RMISocketFactory.getSocketFactory());
  }

  /**
   * Create and export the new remote object, making it available at the
   * given port, using sockets, produced by the specified factories.
   * 
   * @param port the port, on that the object should become available.
   * Zero means anonymous port.
   * 
   * @param clientSocketFactory the client socket factory
   * @param serverSocketFactory the server socket factory
   * 
   * @throws RemoteException if the attempt to export the object failed.
   */
  protected UnicastRemoteObject(int port, 
                                RMIClientSocketFactory clientSocketFactory,
                                RMIServerSocketFactory serverSocketFactory)
    throws RemoteException
  {
    this.port = port;
    //Is RMIXXXSocketFactory serializable
    //this.csf = csf;
    //this.ssf = ssf;
    this.ref = new UnicastServerRef(new ObjID(), port, serverSocketFactory);
    exportObject(this, port);
  }

  protected UnicastRemoteObject(RemoteRef ref)
    throws RemoteException
  {
	super((UnicastServerRef) ref);
	exportObject(this, 0);
  }

  public Object clone()
    throws CloneNotSupportedException
  {
	throw new Error("Not implemented");
  }
  
  /**
   * Export object, making it available for the remote calls at the 
   * anonymous port. 
   * 
   * This method returns the instance of the abstract class, not an interface.
   * Hence it will not work with the proxy stubs that are supported since
   * jdk 1.5 (such stubs cannot be derived from the RemoteStub). Only use
   * this method if you are sure that the stub class will be accessible.
   * 
   * @param obj the object being exported.
   * 
   * @return the remote object stub
   * 
   * @throws RemoteException if the attempt to export the object failed.
   */
  public static RemoteStub exportObject(Remote obj)
    throws RemoteException
  {
	return (RemoteStub) exportObject(obj, 0);
  }

  /**
   * Export object, making it available for the remote calls at the 
   * specified port.
   * 
   * Since jdk 1.5 this method does not longer require the stub class to be
   * present. If such class is not found, the stub is replaced by the 
   * dynamically constructed proxy class. No attempt to find and load the stubs
   * is made if the system property java.rmi.server.ignoreStubClasses
   * is set to true (set to reduce the starting time if the stubs are 
   * surely not present and exclusively 1.2 RMI is used).
   * 
   * @param obj the object being exported.
   * @param port the remote object port
   * 
   * @return the remote object stub
   * 
   * @throws RemoteException if the attempt to export the object failed.
   */
  public static Remote exportObject(Remote obj, int port)
    throws RemoteException
  {
    return exportObject(obj, port, null);
  }

  /**
   * Create and export the new remote object, making it available at the
   * given port, using sockets, produced by the specified factories.
   * 
   * Since jdk 1.5 this method does not longer require the stub class to be
   * present. If such class is not found, the stub is replaced by the 
   * dynamically constructed proxy class. No attempt to find and load the stubs
   * is made if the system property java.rmi.server.ignoreStubClasses
   * is set to true (set to reduce the starting time if the stubs are 
   * surely not present and exclusively 1.2 RMI is used).
   * 
   * @param port the port, on that the object should become available.
   * Zero means anonymous port.
   * 
   * @param serverSocketFactory the server socket factory
   */ 
  static Remote exportObject(Remote obj, int port, 
                             RMIServerSocketFactory serverSocketFactory) 
    throws RemoteException
  {
    UnicastServerRef sref = null;
    if (obj instanceof RemoteObject)
      sref = (UnicastServerRef) ((RemoteObject) obj).getRef();

    if (sref == null)
      sref = new UnicastServerRef(new ObjID(), port, serverSocketFactory);

    Remote stub = sref.exportObject(obj);
    addStub(obj, stub);
    return stub;
  }

  /**
   * FIXME
   */
  public static Remote exportObject(Remote obj, int port,
                                    RMIClientSocketFactory csf,
                                    RMIServerSocketFactory ssf)
    throws RemoteException 
  {
    return (exportObject(obj, port, ssf));
  }

  public static boolean unexportObject(Remote obj, boolean force) 
    throws NoSuchObjectException 
  {
    if (obj instanceof RemoteObject)
      {
        deleteStub(obj);
        UnicastServerRef sref =
          (UnicastServerRef) ((RemoteObject) obj).getRef();
        return sref.unexportObject(obj, force);
      }
    else
      {
        // FIXME
        ;
      }
    return true;
  }

}