remoteobject.java

kaffe是一个java虚拟机的源代码。里面包含了一些java例程和标准的java包。

/*
 * Copyright (c) 1996, 1997, 1998, 1999
 *      Transvirtual Technologies, Inc.  All rights reserved.
 *
 * See the file "license-lesser.terms" for information on usage and 
 * redistribution of this file.
 */

package java.rmi.server;

import java.io.Serializable;
import java.rmi.Remote;
import java.rmi.NoSuchObjectException;
import java.rmi.UnmarshalException;
import java.rmi.server.RemoteRef;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.IOException;

public abstract class RemoteObject
	implements Remote, Serializable {

public static final long serialVersionUID = -3215090123894869218l;

protected transient RemoteRef ref;

protected RemoteObject() {
	this(null);
}

protected RemoteObject(RemoteRef newref) {
	ref = newref;
}

public RemoteRef getRef() {
	return (ref);
}

public static Remote toStub(Remote obj) throws NoSuchObjectException {
	throw new kaffe.util.NotImplemented();
}

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() {
	return (ref.toString());
}

private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
	String cname = in.readUTF();
	if (!cname.equals("")) {
		cname = RemoteRef.packagePrefix + '.' + cname;
		try {
			Class cls = Class.forName(cname);
			ref = (RemoteRef)cls.newInstance();
		}
		catch (InstantiationException e1) {
			throw new UnmarshalException("failed to create ref");
		}
		catch (IllegalAccessException e2) {
			throw new UnmarshalException("failed to create ref");
		}
		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);
	}
}

}