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Diffstat (limited to 'libjava/classpath/java/rmi/server/RemoteObject.java')
| -rw-r--r-- | libjava/classpath/java/rmi/server/RemoteObject.java | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/libjava/classpath/java/rmi/server/RemoteObject.java b/libjava/classpath/java/rmi/server/RemoteObject.java new file mode 100644 index 00000000000..0b3c229c9d9 --- /dev/null +++ b/libjava/classpath/java/rmi/server/RemoteObject.java @@ -0,0 +1,160 @@ +/* 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., 51 Franklin Street, Fifth Floor, Boston, MA +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 +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.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); + } +} + +} |