Source for javax.rmi.PortableRemoteObject

   1: /* PortableRemoteObject.java -- 
   2:    Copyright (C) 2002, 2004 Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package javax.rmi;
  40: 
  41: import gnu.javax.rmi.CORBA.DelegateFactory;
  42: import gnu.javax.rmi.CORBA.GetDelegateInstanceException;
  43: 
  44: import java.rmi.NoSuchObjectException;
  45: import java.rmi.Remote;
  46: import java.rmi.RemoteException;
  47: 
  48: import javax.rmi.CORBA.PortableRemoteObjectDelegate;
  49: 
  50: public class PortableRemoteObject
  51:   implements Remote /* why doc doesn't say should implement Remote */
  52: {
  53: 
  54:   private static PortableRemoteObjectDelegate delegate;
  55:   static
  56:   {
  57:     try
  58:       {
  59:     delegate = (PortableRemoteObjectDelegate)DelegateFactory.getInstance
  60:       ("PortableRemoteObject");
  61:       }
  62:     catch(GetDelegateInstanceException e)
  63:       {
  64:     e.printStackTrace();
  65:     delegate = null;
  66:       }
  67:   }
  68: 
  69:   protected PortableRemoteObject()
  70:     throws RemoteException
  71:   {
  72:     if(delegate != null)
  73:       exportObject((Remote)this);
  74:   }
  75: 
  76:   public static void connect(Remote target, Remote source)
  77:     throws RemoteException
  78:   {
  79:     if(delegate != null)
  80:       delegate.connect(target, source);
  81:   }
  82:     
  83:   public static void exportObject(Remote obj)
  84:     throws RemoteException
  85:   {
  86:     if(delegate != null)
  87:       delegate.exportObject(obj);
  88:   }
  89: 
  90:   public static Object narrow(Object narrowFrom, Class narrowTo)
  91:     throws ClassCastException
  92:   {
  93:     if(delegate != null)
  94:       return delegate.narrow(narrowFrom, narrowTo);
  95:     else
  96:       return null;
  97:   }
  98: 
  99:   public static Remote toStub(Remote obj)
 100:     throws NoSuchObjectException
 101:   {
 102:     if(delegate != null)
 103:       return delegate.toStub(obj);
 104:     else
 105:       return null;
 106:   }
 107: 
 108:   public static void unexportObject(Remote obj)
 109:     throws NoSuchObjectException
 110:   {
 111:     if(delegate != null)
 112:       delegate.unexportObject(obj);
 113:   }
 114:   
 115: }