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Java > Open Source Codes > org > jboss > aspects > versioned > VersionedConstructorInterceptorFactory


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.aspects.versioned;
23
24 import org.jboss.aop.Advisor;
25 import org.jboss.aop.InstanceAdvisor;
26 import org.jboss.aop.joinpoint.Joinpoint;
27 import org.jboss.util.NestedRuntimeException;
28
29 /**
30  *
31  * @author <a HREF="mailto:bill@jboss.org">Bill Burke</a>
32  * @version $Revision: 37406 $
33  */
34 public class VersionedConstructorInterceptorFactory implements org.jboss.aop.advice.AspectFactory
35 {
36    private static VersionedConstructorInterceptor instance = null;
37
38
39    public static synchronized VersionedConstructorInterceptor getInstance()
40    {
41       try
42       {
43          if (instance == null)
44          {
45             instance = new VersionedConstructorInterceptor();
46          }
47          return instance;
48       }
49       catch (Exception JavaDoc ex)
50       {
51          throw new NestedRuntimeException(ex);
52       }
53    }
54
55    public Object JavaDoc createPerVM()
56    {
57       return getInstance();
58    }
59
60    public Object JavaDoc createPerClass(Advisor advisor)
61    {
62       return getInstance();
63    }
64
65    public Object JavaDoc createPerInstance(Advisor advisor, InstanceAdvisor instanceAdvisor)
66    {
67       return getInstance();
68    }
69
70    public Object JavaDoc createPerJoinpoint(Advisor advisor, Joinpoint jp)
71    {
72       return getInstance();
73    }
74
75    public Object JavaDoc createPerJoinpoint(Advisor advisor, InstanceAdvisor instanceAdvisor, Joinpoint jp)
76    {
77       return getInstance();
78    }
79
80    public String JavaDoc getName()
81    {
82       return getClass().getName();
83    }
84 }
85
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