/*
 * 
 * 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 com.sun.jini.discovery.plaintext;

import com.sun.jini.discovery.ClientSubjectChecker;
import com.sun.jini.discovery.DatagramBufferFactory;
import com.sun.jini.discovery.MulticastAnnouncement;
import com.sun.jini.discovery.MulticastAnnouncementEncoder;
import com.sun.jini.discovery.MulticastRequest;
import com.sun.jini.discovery.MulticastRequestDecoder;
import com.sun.jini.discovery.UnicastDiscoveryServer;
import com.sun.jini.discovery.UnicastResponse;
import com.sun.jini.discovery.internal.BaseProvider;
import com.sun.jini.discovery.internal.Plaintext;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;
import java.nio.ByteBuffer;
import java.util.Collection;
import net.jini.core.constraint.InvocationConstraints;
import net.jini.io.UnsupportedConstraintException;

/**
 * Implements the server side of the <code>net.jini.discovery.plaintext</code>
 * discovery format.
 *
 * @author Sun Microsystems, Inc.
 * @since 2.0
 */
public class Server
    extends BaseProvider
    implements MulticastRequestDecoder,
	       MulticastAnnouncementEncoder,
	       UnicastDiscoveryServer
{
    /**
     * Constructs a new instance.
     */
    public Server() {
	super("net.jini.discovery.plaintext");
    }

    // documentation inherited from MulticastRequestDecoder
    public MulticastRequest decodeMulticastRequest(
					    ByteBuffer buf,
					    InvocationConstraints constraints,
					    ClientSubjectChecker checker)
	throws IOException
    {
	Plaintext.checkConstraints(constraints);
	if (checker != null) {
	    checker.checkClientSubject(null);
	}
	return Plaintext.decodeMulticastRequest(buf);
    }

    // documentation inherited from MulticastAnnouncementEncoder
    public void encodeMulticastAnnouncement(MulticastAnnouncement announcement,
					    DatagramBufferFactory bufs,
					    InvocationConstraints constraints)
	throws IOException
    {
	Plaintext.checkConstraints(constraints);
	Plaintext.encodeMulticastAnnouncement(announcement, bufs);
    }

    // documentation inherited from UnicastDiscoveryServer
    public void checkUnicastDiscoveryConstraints(
					    InvocationConstraints constraints)
	throws UnsupportedConstraintException
    {
	Plaintext.checkConstraints(constraints);
    }

    // documentation inherited from UnicastDiscoveryServer
    public void handleUnicastDiscovery(UnicastResponse response,
				       Socket socket,
				       InvocationConstraints constraints,
				       ClientSubjectChecker checker,
				       Collection context,
				       ByteBuffer received,
				       ByteBuffer sent)
	throws IOException
    {
	Plaintext.checkConstraints(constraints);
	if (checker != null) {
	    checker.checkClientSubject(null);
	}
	OutputStream out = new BufferedOutputStream(socket.getOutputStream());
	Plaintext.writeUnicastResponse(out, response, context);
	out.flush();
    }
}
