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.shared.asn1.codec;
021    
022    
023    import org.apache.directory.shared.asn1.codec.stateful.DecoderCallback;
024    import org.apache.directory.shared.asn1.codec.stateful.StatefulDecoder;
025    import org.apache.mina.core.buffer.IoBuffer;
026    import org.apache.mina.core.session.IoSession;
027    import org.apache.mina.filter.codec.ProtocolDecoderAdapter;
028    import org.apache.mina.filter.codec.ProtocolDecoderOutput;
029    
030    
031    /**
032     * Adapts {@link StatefulDecoder} to MINA <tt>ProtocolDecoder</tt>
033     * 
034     * @author The Apache Directory Project (mina-dev@directory.apache.org)
035     * @version $Rev: 725712 $, $Date: 2008-12-11 16:32:04 +0100 (Thu, 11 Dec 2008) $, 
036     */
037    public class Asn1CodecDecoder extends ProtocolDecoderAdapter
038    {
039        private final StatefulDecoder decoder;
040        private final DecoderCallbackImpl callback = new DecoderCallbackImpl();
041    
042    
043        public Asn1CodecDecoder( StatefulDecoder decoder )
044        {
045            decoder.setCallback( callback );
046            this.decoder = decoder;
047        }
048    
049    
050        public void decode( IoSession session, IoBuffer in, ProtocolDecoderOutput out ) throws DecoderException
051        {
052            callback.decOut = out;
053            decoder.decode( in.buf() );
054        }
055    
056    
057        private class DecoderCallbackImpl implements DecoderCallback
058        {
059            private ProtocolDecoderOutput decOut;
060    
061            public void decodeOccurred( StatefulDecoder decoder, Object decoded )
062            {
063                decOut.write( decoded );
064            }
065        }
066    }