1 /***
2 * Redistribution and use of this software and associated documentation
3 * ("Software"), with or without modification, are permitted provided
4 * that the following conditions are met:
5 *
6 * 1. Redistributions of source code must retain copyright
7 * statements and notices. Redistributions must also contain a
8 * copy of this document.
9 *
10 * 2. Redistributions in binary form must reproduce the
11 * above copyright notice, this list of conditions and the
12 * following disclaimer in the documentation and/or other
13 * materials provided with the distribution.
14 *
15 * 3. The name "Exolab" must not be used to endorse or promote
16 * products derived from this Software without prior written
17 * permission of Exoffice Technologies. For written permission,
18 * please contact info@exolab.org.
19 *
20 * 4. Products derived from this Software may not be called "Exolab"
21 * nor may "Exolab" appear in their names without prior written
22 * permission of Exoffice Technologies. Exolab is a registered
23 * trademark of Exoffice Technologies.
24 *
25 * 5. Due credit should be given to the Exolab Project
26 * (http://www.exolab.org/).
27 *
28 * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
29 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
30 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
31 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
32 * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
33 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
34 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
35 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
39 * OF THE POSSIBILITY OF SUCH DAMAGE.
40 *
41 * Copyright 2000 (C) Exoffice Technologies Inc. All Rights Reserved.
42 */
43
44 package org.exolab.jms.util;
45
46
47 /***
48 * Helper class for manipulating JMSMessageIDs
49 *
50 * @version $Revision: 1.1 $ $Date: 2004/11/26 01:51:02 $
51 * @author <a href="mailto:tima@intalio.com">Tim Anderson</a>
52 **/
53 public class MessageIdHelper {
54
55 /***
56 * Return the 'null' JMSMessageID.
57 * This is the first Id recognised by OpenJMS, but not assigned
58 * to messages.
59 *
60 * @return String the 'null' message Id
61 */
62 public static String getNull() {
63 return NULL_ID;
64 }
65
66 /***
67 * Generate a JMSMessageID
68 *
69 * @param Id numeric representation of the Id
70 * @return String the generated JMSMessageID
71 */
72 public static String generate(long Id) {
73 return ID_PREFIX + Id;
74 }
75
76 /***
77 * Convert a JMSMessageID to its long value
78 *
79 * @param messageId JMSMessageID to convert
80 * @return long value of the JMSMessageID
81 */
82 public static long convert(String messageId) {
83
84 return Long.parseLong(messageId.substring(ID_PREFIX.length()));
85 }
86
87 private static final String ID_PREFIX = "ID:";
88 private static final String NULL_ID = "ID:0";
89 }