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.core.buffer.IoBuffer;
23 import org.apache.mina.core.session.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 MINA Project (dev@mina.apache.org)
33 * @version $Rev: 671827 $, $Date: 2008-06-26 10:49:48 +0200 (jeu, 26 jun 2008) $
34 */
35 public class AddMessageDecoder extends AbstractMessageDecoder {
36
37 public AddMessageDecoder() {
38 super(Constants.ADD);
39 }
40
41 @Override
42 protected AbstractMessage decodeBody(IoSession session, IoBuffer in) {
43 if (in.remaining() < Constants.ADD_BODY_LEN) {
44 return null;
45 }
46
47 AddMessage m = new AddMessage();
48 m.setValue(in.getInt());
49 return m;
50 }
51
52 public void finishDecode(IoSession session, ProtocolDecoderOutput out)
53 throws Exception {
54 }
55 }