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Java > Open Source Codes > org > apache > mina > example > sumup > codec > AddMessageDecoder


1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one
3  * or more contributor license agreements. See the NOTICE file
4  * distributed with this work for additional information
5  * regarding copyright ownership. The ASF licenses this file
6  * to you under the Apache License, Version 2.0 (the
7  * "License"); you may not use this file except in compliance
8  * with the License. You may obtain a copy of the License at
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing,
13  * software distributed under the License is distributed on an
14  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15  * KIND, either express or implied. See the License for the
16  * specific language governing permissions and limitations
17  * under the License.
18  *
19  */
20 package org.apache.mina.example.sumup.codec;
21
22 import org.apache.mina.common.ByteBuffer;
23 import org.apache.mina.common.IoSession;
24 import org.apache.mina.example.sumup.message.AbstractMessage;
25 import org.apache.mina.example.sumup.message.AddMessage;
26 import org.apache.mina.filter.codec.ProtocolDecoderOutput;
27 import org.apache.mina.filter.codec.demux.MessageDecoder;
28
29 /**
30  * A {@link MessageDecoder} that decodes {@link AddMessage}.
31  *
32  * @author The Apache Directory Project (mina-dev@directory.apache.org)
33  * @version $Rev: 555855 $, $Date: 2007-07-13 12:19:00 +0900 (금, 13 7월 2007) $
34  */
35 public class AddMessageDecoder extends AbstractMessageDecoder {
36
37     public AddMessageDecoder() {
38         super(Constants.ADD);
39     }
40
41     protected AbstractMessage decodeBody(IoSession session, ByteBuffer in) {
42         if (in.remaining() < Constants.ADD_BODY_LEN) {
43             return null;
44         }
45
46         AddMessage m = new AddMessage();
47         m.setValue(in.getInt());
48         return m;
49     }
50
51     public void finishDecode(IoSession session, ProtocolDecoderOutput out)
52             throws Exception JavaDoc {
53     }
54 }
55
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