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    
021    package org.apache.directory.server.dns.protocol;
022    
023    
024    import org.apache.mina.core.session.IoSession;
025    import org.apache.mina.filter.codec.ProtocolCodecFactory;
026    import org.apache.mina.filter.codec.ProtocolDecoder;
027    import org.apache.mina.filter.codec.ProtocolEncoder;
028    
029    
030    /**
031     * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a>
032     * @version $Rev: 545041 $, $Date: 2007-06-06 20:31:34 -0700 (Wed, 06 Jun 2007) $
033     */
034    public class DnsProtocolTcpCodecFactory implements ProtocolCodecFactory
035    {
036        private static final DnsProtocolTcpCodecFactory INSTANCE = new DnsProtocolTcpCodecFactory();
037    
038    
039        /**
040         * Returns the singleton instance of {@link DnsProtocolTcpCodecFactory}.
041         *
042         * @return The singleton instance of {@link DnsProtocolTcpCodecFactory}.
043         */
044        public static DnsProtocolTcpCodecFactory getInstance()
045        {
046            return INSTANCE;
047        }
048    
049    
050        private DnsProtocolTcpCodecFactory()
051        {
052            // Private constructor prevents instantiation outside this class.
053        }
054    
055    
056        public ProtocolEncoder getEncoder( IoSession session )
057        {
058            // Create a new encoder.
059            return new DnsTcpEncoder();
060        }
061    
062    
063        public ProtocolDecoder getDecoder( IoSession session )
064        {
065            // Create a new decoder.
066            return new DnsTcpDecoder();
067        }
068    }