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Java > Open Source Codes > com > sun > enterprise > management > support > UniqueIDGenerator


1 /*
2  * The contents of this file are subject to the terms
3  * of the Common Development and Distribution License
4  * (the License). You may not use this file except in
5  * compliance with the License.
6  *
7  * You can obtain a copy of the license at
8  * https://glassfish.dev.java.net/public/CDDLv1.0.html or
9  * glassfish/bootstrap/legal/CDDLv1.0.txt.
10  * See the License for the specific language governing
11  * permissions and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL
14  * Header Notice in each file and include the License file
15  * at glassfish/bootstrap/legal/CDDLv1.0.txt.
16  * If applicable, add the following below the CDDL Header,
17  * with the fields enclosed by brackets [] replaced by
18  * you own identifying information:
19  * "Portions Copyrighted [year] [name of copyright owner]"
20  *
21  * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
22  */
23  
24 /*
25  * $Header: /cvs/glassfish/admin/mbeanapi-impl/src/java/com/sun/enterprise/management/support/UniqueIDGenerator.java,v 1.3 2005/12/25 03:40:53 tcfujii Exp $
26  * $Revision: 1.3 $
27  * $Date: 2005/12/25 03:40:53 $
28  */
29 package com.sun.enterprise.management.support;
30
31
32 /**
33     Produces a series of unique identifiers which are unique
34     for this instance.
35  */
36 public final class UniqueIDGenerator
37 {
38     private int mID;
39     private final String JavaDoc mPrefix;
40     
41         public
42     UniqueIDGenerator( String JavaDoc prefix )
43     {
44         mPrefix = prefix == null ? "" : prefix;
45         
46         mID = 0;
47     }
48     
49         public synchronized Object JavaDoc
50     createID()
51     {
52         ++mID;
53         return( mPrefix + mID );
54     }
55 }
56
57
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