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1   /*
2    *   @(#) $Id: AddMessageDecoder.java 332218 2005-11-10 03:52:42Z trustin $
3    *
4    *   Copyright 2004 The Apache Software Foundation
5    *
6    *   Licensed under the Apache License, Version 2.0 (the "License");
7    *   you may not use this file except in compliance with the License.
8    *   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, software
13   *   distributed under the License is distributed on an "AS IS" BASIS,
14   *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   *   See the License for the specific language governing permissions and
16   *   limitations under the License.
17   *
18   */
19  package org.apache.mina.examples.sumup.codec;
20  
21  import org.apache.mina.common.ByteBuffer;
22  import org.apache.mina.examples.sumup.message.AbstractMessage;
23  import org.apache.mina.examples.sumup.message.AddMessage;
24  import org.apache.mina.protocol.ProtocolSession;
25  import org.apache.mina.protocol.codec.MessageDecoder;
26  
27  /***
28   * A {@link MessageDecoder} that decodes {@link AddMessage}.
29   *
30   * @author The Apache Directory Project
31   * @version $Rev: 332218 $, $Date: 2005-11-10 12:52:42 +0900 $
32   */
33  public class AddMessageDecoder extends AbstractMessageDecoder
34  {
35  
36      public AddMessageDecoder()
37      {
38          super( Constants.ADD );
39      }
40  
41      protected AbstractMessage decodeBody( ProtocolSession session, ByteBuffer in )
42      {
43          if( in.remaining() < Constants.ADD_BODY_LEN )
44          {
45              return null;
46          }
47  
48          AddMessage m = new AddMessage();
49          m.setValue( in.getInt() );
50          return m;
51      }
52  }