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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: 1.2 $ $Date: 2003/08/07 13:33:12 $ 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 // strip off 'ID:' prefix 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 }

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