001    /*
002     *  Licensed to the Apache Software Foundation (ASF) under one
003     *  or more contributor license agreements.  See the NOTICE file
004     *  distributed with this work for additional information
005     *  regarding copyright ownership.  The ASF licenses this file
006     *  to you under the Apache License, Version 2.0 (the
007     *  "License"); you may not use this file except in compliance
008     *  with the License.  You may obtain a copy of the License at
009     *  
010     *    http://www.apache.org/licenses/LICENSE-2.0
011     *  
012     *  Unless required by applicable law or agreed to in writing,
013     *  software distributed under the License is distributed on an
014     *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015     *  KIND, either express or implied.  See the License for the
016     *  specific language governing permissions and limitations
017     *  under the License. 
018     *  
019     */
020    package org.apache.directory.server.kerberos.protocol;
021    
022    
023    import java.io.IOException;
024    
025    import org.apache.directory.server.kerberos.shared.io.encoder.ErrorMessageEncoder;
026    import org.apache.directory.server.kerberos.shared.io.encoder.KdcReplyEncoder;
027    import org.apache.directory.server.kerberos.shared.messages.ErrorMessage;
028    import org.apache.directory.server.kerberos.shared.messages.KdcReply;
029    import org.apache.mina.core.buffer.IoBuffer;
030    import org.apache.mina.core.session.IoSession;
031    import org.apache.mina.filter.codec.ProtocolEncoderAdapter;
032    import org.apache.mina.filter.codec.ProtocolEncoderOutput;
033    
034    
035    /**
036     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
037     * @version $Rev: 725712 $, $Date: 2008-12-11 16:32:04 +0100 (Thu, 11 Dec 2008) $
038     */
039    public class KerberosUdpEncoder extends ProtocolEncoderAdapter
040    {
041        private KdcReplyEncoder replyEncoder = new KdcReplyEncoder();
042        private ErrorMessageEncoder errorEncoder = new ErrorMessageEncoder();
043    
044    
045        public void encode( IoSession session, Object message, ProtocolEncoderOutput out ) throws IOException
046        {
047            IoBuffer buf = IoBuffer.allocate( 1024 );
048    
049            if ( message instanceof KdcReply )
050            {
051                replyEncoder.encode( ( KdcReply ) message, buf.buf() );
052            }
053            else
054            {
055                if ( message instanceof ErrorMessage )
056                {
057                    errorEncoder.encode( ( ErrorMessage ) message, buf.buf() );
058                }
059            }
060    
061            buf.flip();
062    
063            out.write( buf );
064        }
065    }