| /* RemoteObject.java -- |
| Copyright (c) 1996, 1997, 1998, 1999, 2004 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 |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package java.rmi.server; |
| |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.io.Serializable; |
| import java.lang.reflect.Constructor; |
| import java.rmi.NoSuchObjectException; |
| import java.rmi.Remote; |
| import java.rmi.UnmarshalException; |
| import java.util.WeakHashMap; |
| |
| public abstract class RemoteObject |
| implements Remote, Serializable { |
| |
| private static final long serialVersionUID = -3215090123894869218l; |
| |
| protected transient RemoteRef ref; |
| |
| private static final WeakHashMap stubs = new WeakHashMap(); |
| |
| protected RemoteObject() { |
| this(null); |
| } |
| |
| protected RemoteObject(RemoteRef newref) { |
| ref = newref; |
| } |
| |
| public RemoteRef getRef() { |
| return (ref); |
| } |
| |
| synchronized static void addStub(Remote obj, Remote stub) |
| { |
| stubs.put(obj, stub); |
| } |
| |
| synchronized static void deleteStub(Remote obj) |
| { |
| stubs.remove(obj); |
| } |
| |
| public static Remote toStub(Remote obj) throws NoSuchObjectException |
| { |
| Remote stub = (Remote)stubs.get(obj); |
| |
| if (stub == null) |
| throw new NoSuchObjectException(obj.getClass().getName()); |
| |
| return stub; |
| } |
| |
| public int hashCode() { |
| if (ref == null) { |
| return (0); |
| } |
| else { |
| return (ref.hashCode()); |
| } |
| } |
| |
| public boolean equals(Object obj) { |
| // We only compare references. |
| return (this == obj); |
| } |
| |
| public String toString() |
| { |
| if (ref == null) |
| return getClass ().toString (); |
| return (ref.toString ()); |
| } |
| |
| private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException |
| { |
| String cname = in.readUTF(); |
| if (!cname.equals("")) |
| { |
| if (cname.equals ("UnicastRef2")) |
| { |
| // hack for interoperating with JDK |
| cname = "UnicastRef"; |
| in.read (); //some unknown UnicastRef2 field |
| } |
| |
| cname = RemoteRef.packagePrefix + '.' + cname; |
| try |
| { |
| Class cls = Class.forName(cname); |
| ref = (RemoteRef)cls.newInstance(); |
| } |
| catch (InstantiationException e1) |
| { |
| throw new UnmarshalException("failed to create ref", e1); |
| } |
| catch (IllegalAccessException e2) |
| { |
| throw new UnmarshalException("failed to create ref", e2); |
| } |
| ref.readExternal(in); |
| } |
| else |
| { |
| ref = (RemoteRef)in.readObject(); |
| } |
| } |
| |
| private void writeObject(ObjectOutputStream out) throws IOException, ClassNotFoundException { |
| if (ref == null) { |
| throw new UnmarshalException("no ref to serialize"); |
| } |
| String cname = ref.getRefClass(out); |
| if (cname != null && cname.length() > 0) { |
| out.writeUTF(cname); |
| ref.writeExternal(out); |
| } |
| else { |
| out.writeUTF(""); |
| out.writeObject(ref); |
| } |
| } |
| |
| } |