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Java > Open Source Codes > org > jboss > util > id > SerialVersion


1 /*
2   * JBoss, Home of Professional Open Source
3   * Copyright 2005, JBoss Inc., and individual contributors as indicated
4   * by the @authors tag. See the copyright.txt in the distribution for a
5   * full listing of individual contributors.
6   *
7   * This is free software; you can redistribute it and/or modify it
8   * under the terms of the GNU Lesser General Public License as
9   * published by the Free Software Foundation; either version 2.1 of
10   * the License, or (at your option) any later version.
11   *
12   * This software is distributed in the hope that it will be useful,
13   * but WITHOUT ANY WARRANTY; without even the implied warranty of
14   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15   * Lesser General Public License for more details.
16   *
17   * You should have received a copy of the GNU Lesser General Public
18   * License along with this software; if not, write to the Free
19   * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20   * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21   */
22 package org.jboss.util.id;
23
24 import java.security.AccessController JavaDoc;
25 import java.security.PrivilegedAction JavaDoc;
26
27 /**
28  * Serialization version compatibility mode constants.<p>
29  *
30  * Contains static constants and attributes to help with serialization
31  * versioning.<p>
32  *
33  * Set the system property <pre>org.jboss.j2ee.LegacySerialization</pre>
34  * to serialization compatibility with jboss-4.0.1 and earlier. The
35  * serialVersionUID values were synched with the j2ee 1.4 ri classes and
36  * explicitly set in jboss-4.0.2 which is what
37  *
38  * @author <a HREF="mailto:Adrian.Brock@JBoss.com">Adrian Brock</a>.
39  * @version $Revision: 1958 $
40  */
41 public class SerialVersion
42 {
43    // Static --------------------------------------------------------
44
45    /** Legacy, jboss-4.0.1 through jboss-4.0.0 */
46    public static final int LEGACY = 0;
47
48    /** The serialization compatible with Sun's RI, jboss-4.0.2+ */
49    public static final int JBOSS_402 = 1;
50
51    /**
52     * The serialization version to use
53     */
54    public static int version = JBOSS_402;
55
56    /** Determine the serialization version */
57    static
58    {
59       AccessController.doPrivileged(new PrivilegedAction JavaDoc()
60       {
61          public Object JavaDoc run()
62          {
63             try
64             {
65                if (System.getProperty("org.jboss.j2ee.LegacySerialization") != null)
66                   version = LEGACY;
67             }
68             catch (Throwable JavaDoc ignored)
69             {
70             }
71             return null;
72          }
73       });
74    }
75 }
76
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