1 /*
2 * Copyright (c) 1998-2002 The Jgroup Team.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU Lesser General Public License for more details.
12 *
13 * You should have received a copy of the GNU Lesser General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
16 *
17 */
18
19 package jgroup.relacs.types;
20
21 import java.io.IOException;
22 import java.io.ObjectInput;
23 import java.io.ObjectOutput;
24
25 /**
26 * The <code>MessageTag</code> class wraps a value of the relacs daemon
27 * and mss type in an object.
28 *
29 * @author Hein Meling
30 * @since Jgroup 1.2
31 */
32 public final class MessageTag
33 {
34
35 ////////////////////////////////////////////////////////////////////////////////////////////
36 // Constants
37 ////////////////////////////////////////////////////////////////////////////////////////////
38
39 /** Size of this object in bytes */
40 public static final int SIZE = 1;
41
42
43 ////////////////////////////////////////////////////////////////////////////////////////////
44 // Marshaling / unmarshaling methods
45 ////////////////////////////////////////////////////////////////////////////////////////////
46
47 /**
48 * Marshals the specified message tag to an outgoing message.
49 */
50 public static void marshal(ObjectOutput msg, byte value)
51 throws IOException
52 {
53 msg.writeByte(value);
54 }
55
56 /**
57 * Unmarshals a message tag from an incoming message.
58 */
59 public static byte unmarshal(ObjectInput msg)
60 throws IOException
61 {
62 return msg.readByte();
63 }
64
65 /**
66 * Unmarshals a message tag from a byte.
67 */
68 public static byte unmarshal(byte value)
69 {
70 return value;
71 }
72
73 } // END Flag