/*
 * 
 * Copyright 2004 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * The contents of this file are subject to the Sun Community Source
 * License v3.0/Jini Technology Specific Attachment v 1.0 (the
 * "License"). You may not use this file except in compliance with the
 * License. You may obtain a copy of the License at
 * http://wwws.sun.com/software/jini/licensing/SCSL3_JiniTSA1.html.
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 * 
 * The Reference Code is Jini Technology Core Platform code, v2.0. The
 * Developer of the Reference Code is Sun Microsystems, Inc.
 * 
 * Contributor(s): Sun Microsystems, Inc.
 * 
 * The contents of this file comply with the Jini Technology Core
 * Platform Compatibility Kit, v2.0A.
 * 
 * Tester(s): Sun Microsystems, Inc.
 * 
 * Test Platform(s):
 * Java 2 SDK, Standard Edition, Version 1.4.2_03 for Solaris(TM)SPARC/x86
 * Java 2 SDK, Standard Edition, Version 1.4.2_03 for Linux (Intel x86)
 * Java 2 SDK, Standard Edition, Version 1.4.2_03 for Windows (Intel Platform)
 * 
 */
package net.jini.discovery;

import java.io.ObjectOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.rmi.MarshalledObject;
import net.jini.core.lookup.ServiceRegistrar;

/**
 * Encapsulate the details of marshaling a unicast response.
 *
 * @author Sun Microsystems, Inc.
 *
 * @see IncomingUnicastResponse
 */
public class OutgoingUnicastResponse {
    /**
     * The current version of the unicast discovery protocol.
     */
    protected int protoVersion = 1;

    /**
     * Marshal a unicast response to the given output stream.  The
     * stream is flushed afterwards.
     *
     * @param str the stream to marshal to
     * @param reg the registrar object to marshal
     * @param groups the groups in which the registrar is currently a
     * member
     * @exception IOException a problem occurred during marshaling
     */
    public static void marshal(OutputStream str,
			       ServiceRegistrar reg,
			       String[] groups)
	throws IOException
    {
	ObjectOutputStream ostr = new ObjectOutputStream(str);
	ostr.writeObject(new MarshalledObject(reg));
	ostr.writeInt(groups.length);
	for (int i = 0; i < groups.length; i++) {
	    ostr.writeUTF(groups[i]);
	}
	ostr.flush();
    }
}
