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


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 java.util.Collections JavaDoc;
23 import java.util.HashSet JavaDoc;
24 import java.util.Set JavaDoc;
25
26 import org.apache.mina.common.ByteBuffer;
27 import org.apache.mina.common.IoSession;
28 import org.apache.mina.example.sumup.message.AbstractMessage;
29 import org.apache.mina.example.sumup.message.ResultMessage;
30 import org.apache.mina.filter.codec.demux.MessageEncoder;
31
32 /**
33  * A {@link MessageEncoder} that encodes {@link ResultMessage}.
34  *
35  * @author The Apache Directory Project (mina-dev@directory.apache.org)
36  * @version $Rev: 555855 $, $Date: 2007-07-13 12:19:00 +0900 (금, 13 7월 2007) $
37  */
38 public class ResultMessageEncoder extends AbstractMessageEncoder {
39     private static final Set JavaDoc<Class JavaDoc<?>> TYPES;
40
41     static {
42         Set JavaDoc<Class JavaDoc<?>> types = new HashSet JavaDoc<Class JavaDoc<?>>();
43         types.add(ResultMessage.class);
44         TYPES = Collections.unmodifiableSet(types);
45     }
46
47     public ResultMessageEncoder() {
48         super(Constants.RESULT);
49     }
50
51     protected void encodeBody(IoSession session, AbstractMessage message,
52             ByteBuffer out) {
53         ResultMessage m = (ResultMessage) message;
54         if (m.isOk()) {
55             out.putShort((short) Constants.RESULT_OK);
56             out.putInt(m.getValue());
57         } else {
58             out.putShort((short) Constants.RESULT_ERROR);
59         }
60     }
61
62     public Set JavaDoc<Class JavaDoc<?>> getMessageTypes() {
63         return TYPES;
64     }
65
66     public void dispose() throws Exception JavaDoc {
67     }
68
69 }
70
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