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


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.joinpoint.FieldReadInvocation;
25 import org.jboss.aop.joinpoint.FieldWriteInvocation;
26
27 /**
28  *
29  * @author <a HREF="mailto:bill@jboss.org">Bill Burke</a>
30  * @version $Revision: 37406 $
31  */
32 public class StateChangeInterceptor implements org.jboss.aop.advice.Interceptor
33 {
34    protected DistributedPOJOState manager;
35
36    public StateChangeInterceptor(DistributedPOJOState manager)
37    {
38       this.manager = manager;
39    }
40
41    public String JavaDoc getName() { return "StateChangeInterceptor"; }
42
43    /**
44     *
45     */
46    public Object JavaDoc invoke(org.jboss.aop.joinpoint.Invocation invocation) throws Throwable JavaDoc
47    {
48       if (!(invocation instanceof FieldWriteInvocation) && !(invocation instanceof FieldReadInvocation)) return invocation.invokeNext();
49
50       // Don't need to worry if we're static or not because this is an instance interceptor
51
52       if (invocation instanceof FieldReadInvocation)
53       {
54          return manager.fieldRead(invocation);
55       }
56       else
57       {
58          return manager.fieldWrite(invocation);
59       }
60    }
61
62 }
63
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