KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > jboss > ejb > plugins > lock > Entrancy


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.ejb.plugins.lock;
23
24 import java.io.Serializable JavaDoc;
25 import java.io.ObjectStreamException JavaDoc;
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 JavaDoc
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 JavaDoc toString()
46    {
47       if(value)
48       {
49          return "ENTRANT";
50       } else
51       {
52          return "NON_ENTRANT";
53       }
54    }
55
56    Object JavaDoc readResolve() throws ObjectStreamException JavaDoc
57    {
58       if(value)
59       {
60          return ENTRANT;
61       } else
62       {
63          return NON_ENTRANT;
64       }
65    }
66
67 }
68
69
Popular Tags