/*
 * 
 * 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.DataInputStream;
import java.io.InputStream;
import java.io.IOException;

/**
 * Encapsulate the details of unmarshaling an incoming unicast
 * request.  This class has no public methods because the request
 * portion of the current version of the unicast discovery protocol
 * does nothing other than indicate its version.
 *
 * @author Sun Microsystems, Inc.
 *
 * @see OutgoingUnicastRequest
 */
public class IncomingUnicastRequest {
    /**
     * The current version of the unicast discovery protocol.
     */
    protected int protoVersion = 1;

    /**
     * Construct a new object, initialized by unmarshaling the
     * contents of an input stream.
     *
     * @param str the stream from which to unmarshal a request
     * @exception IOException the request could not be unmarshaled
     */
    public IncomingUnicastRequest(InputStream str) throws IOException {
	DataInputStream dstr = new DataInputStream(str);
	int proto = dstr.readInt();
	if (proto != protoVersion)
	    throw new IOException("unsupported protocol version: " + proto);
    }
}
