c5d5ab799e5615957f16f153aea55c1ae42dd649
[openflowjava.git] / openflow-protocol-impl / src / main / java / org / opendaylight / openflowjava / protocol / impl / deserialization / factories / EchoReplyMessageFactory.java
1 /*
2  * Copyright (c) 2013 Pantheon Technologies s.r.o. and others. All rights reserved.
3  *
4  * This program and the accompanying materials are made available under the
5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6  * and is available at http://www.eclipse.org/legal/epl-v10.html
7  */
8
9 package org.opendaylight.openflowjava.protocol.impl.deserialization.factories;
10
11 import io.netty.buffer.ByteBuf;
12
13 import org.opendaylight.openflowjava.protocol.impl.deserialization.OFDeserializer;
14 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.EchoOutput;
15 import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.EchoOutputBuilder;
16
17 /**
18  * Translates EchoReply messages (both OpenFlow v1.0 and OpenFlow v1.3)
19  * @author michal.polkorab
20  * @author timotej.kubas
21  */
22 public class EchoReplyMessageFactory implements OFDeserializer<EchoOutput> {
23
24     private static EchoReplyMessageFactory instance;
25
26     private EchoReplyMessageFactory() {
27         // do nothing, just singleton
28     }
29     
30     /**
31      * @return singleton factory
32      */
33     public static synchronized EchoReplyMessageFactory getInstance() {
34         if (instance == null) {
35             instance = new EchoReplyMessageFactory();
36         }
37         return instance;
38     }
39     
40     @Override
41     public EchoOutput bufferToMessage(ByteBuf rawMessage, short version) {
42         EchoOutputBuilder builder = new EchoOutputBuilder();
43         builder.setVersion(version);
44         builder.setXid(rawMessage.readUnsignedInt());
45         int remainingBytes = rawMessage.readableBytes();
46         if (remainingBytes > 0) {
47             builder.setData(rawMessage.readBytes(remainingBytes).array());
48         }
49         return builder.build();
50     }
51
52 }