Entrancy


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4   * by the @authors tag. See the copyright.txt in the distribution for a
5   * full listing of individual contributors.
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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.ejb.plugins.lock;
23  
24  import java.io.Serializable  ;
25  import java.io.ObjectStreamException  ;
26  
27  /**
28   * This type safe enumeration s used to mark an invocation as non-entrant.
29   *
30   * @author <a HREF="mailto:dain@daingroup.com">Dain Sundstrom</a>
31   * @version $Revision: 37459 $
32   */
33  public final class Entrancy implements Serializable  
34  {
35     public static final Entrancy ENTRANT = new Entrancy(true);
36     public static final Entrancy NON_ENTRANT = new Entrancy(false);
37  
38     private final transient boolean value;
39      
40     private Entrancy(boolean value)
41     {
42        this.value = value;
43     }
44  
45     public String   toString()
46     {
47        if(value)
48        {
49           return "ENTRANT";
50        } else
51        {
52           return "NON_ENTRANT";
53        }
54     }
55  
56     Object   readResolve() throws ObjectStreamException  
57     {
58        if(value)
59        {
60           return ENTRANT;
61        } else
62        {
63           return NON_ENTRANT;
64        }
65     }
66  
67  }
68  
69
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