View Javadoc

1   /*
2    *   @(#) $Id: ResultMessageEncoder.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 java.util.Collections;
22  import java.util.HashSet;
23  import java.util.Set;
24  
25  import org.apache.mina.common.ByteBuffer;
26  import org.apache.mina.examples.sumup.message.AbstractMessage;
27  import org.apache.mina.examples.sumup.message.ResultMessage;
28  import org.apache.mina.protocol.ProtocolSession;
29  import org.apache.mina.protocol.codec.MessageEncoder;
30  
31  /***
32   * A {@link MessageEncoder} that encodes {@link ResultMessage}.
33   *
34   * @author The Apache Directory Project
35   * @version $Rev: 332218 $, $Date: 2005-11-10 12:52:42 +0900 $
36   */
37  public class ResultMessageEncoder extends AbstractMessageEncoder
38  {
39      private static final Set TYPES;
40      
41      static
42      {
43          Set types = new HashSet();
44          types.add( ResultMessage.class );
45          TYPES = Collections.unmodifiableSet( types );
46      }
47  
48      public ResultMessageEncoder()
49      {
50          super( Constants.RESULT );
51      }
52  
53      protected void encodeBody( ProtocolSession session, AbstractMessage message, ByteBuffer out )
54      {
55          ResultMessage m = ( ResultMessage ) message;
56          if( m.isOk() )
57          {
58              out.putShort( ( short ) Constants.RESULT_OK );
59              out.putInt( m.getValue() );
60          }
61          else
62          {
63              out.putShort( ( short ) Constants.RESULT_ERROR );
64          }
65      }
66  
67      public Set getMessageTypes()
68      {
69          return TYPES;
70      }
71  
72  }