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Java > Open Source Codes > org > apache > mina > filter > codec > netty > NettyEncoder


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.filter.codec.netty;
21
22 import net.gleamynode.netty2.Message;
23
24 import org.apache.mina.common.ByteBuffer;
25 import org.apache.mina.common.IoSession;
26 import org.apache.mina.filter.codec.ProtocolEncoder;
27 import org.apache.mina.filter.codec.ProtocolEncoderException;
28 import org.apache.mina.filter.codec.ProtocolEncoderOutput;
29
30 /**
31  * A MINA <tt>ProtocolEncoder</tt> that encodes Netty2 {@link Message}s
32  * into byte buffers.
33  *
34  * @author The Apache Directory Project (mina-dev@directory.apache.org)
35  * @version $Rev: 555855 $, $Date: 2007-07-13 12:19:00 +0900 (금, 13 7월 2007) $,
36  */
37 public class NettyEncoder implements ProtocolEncoder {
38     /**
39      * Creates a new instance.
40      */
41     public NettyEncoder() {
42     }
43
44     public void encode(IoSession session, Object JavaDoc message,
45             ProtocolEncoderOutput out) throws Exception JavaDoc {
46         if (!(message instanceof Message)) {
47             throw new ProtocolEncoderException(
48                     "This encoder can decode only Netty Messages.");
49         }
50
51         for (;;) {
52             ByteBuffer buf = ByteBuffer.allocate(8192);
53             Message m = (Message) message;
54             try {
55                 if (m.write(buf.buf())) {
56                     break;
57                 }
58             } finally {
59                 buf.flip();
60                 if (buf.hasRemaining()) {
61                     out.write(buf);
62                 } else {
63                     buf.release();
64                 }
65             }
66         }
67     }
68
69     public void dispose(IoSession session) throws Exception JavaDoc {
70     }
71 }
72
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