Vote


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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.
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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.tm.remoting.interfaces;
23  
24  import java.io.ObjectStreamException  ;
25  import java.io.Serializable  ;
26  
27  /**
28   * Type safe enumeration for <code>Resource</code> votes.
29   *
30   * @author Scott.Stark@jboss.org
31   * @author <a HREF="mailto:reverbel@ime.usp.br">Francisco Reverbel</a>
32   * @version $Revision: 37459 $ 
33   */
34  public class Vote implements Serializable  
35  {
36     static final long serialVersionUID = -6997498750766547785L;
37  
38     /** 
39      * The max ordinal value in use for the Vote enums. When you add a
40      * new key enum value you must assign it an ordinal value of the current
41      * MAX_TYPE_ID+1 and update the MAX_TYPE_ID value.
42      */
43     private static final int MAX_TYPE_ID = 2;
44  
45     /** The array of Vote indexed by ordinal value of the key */
46     private static final Vote[] values = new Vote[MAX_TYPE_ID + 1];
47     
48     public static final Vote COMMIT = new Vote("COMMIT", 0);
49     public static final Vote ROLLBACK = new Vote("ROLLBACK", 1);
50     public static final Vote READONLY = new Vote("READONLY", 2);
51     
52     private final transient String   name;
53  
54     // this is the only value serialized
55     private final int ordinal;
56  
57     private Vote(String   name, int ordinal)
58     {
59        this.name = name;
60        this.ordinal = ordinal;
61        values[ordinal] = this;
62     }
63  
64     public String   toString()
65     {
66        return name;
67     }
68     
69     Object   readResolve() throws ObjectStreamException  
70     {
71        return values[ordinal];
72     }
73  
74  }
75
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