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Java > Open Source Codes > org > jboss > test > aop > field > TraceInterceptor


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.test.aop.field;
23
24 import org.jboss.aop.advice.Interceptor;
25 import org.jboss.aop.joinpoint.FieldReadInvocation;
26 import org.jboss.aop.joinpoint.Invocation;
27
28 /**
29  *
30  * @author <a HREF="mailto:stalep@conduct.no">Stale W. Pedersen</a>
31  * @version $Revision
32  */
33 public class TraceInterceptor implements Interceptor
34 {
35
36    public String JavaDoc getName()
37    {
38       return "TraceInterceptor";
39    }
40
41    public Object JavaDoc invoke(Invocation invocation) throws Throwable JavaDoc
42    {
43       String JavaDoc msg = null;
44       if (invocation instanceof FieldReadInvocation)
45       {
46          msg = "read field name: " + ((FieldReadInvocation)invocation).getField();
47       }
48
49       try
50       {
51          System.out.println("<<< Trace : " + msg);
52          return invocation.invokeNext();
53       }
54       finally
55       {
56          System.out.println(">>> Leaving Trace");
57       }
58    }
59
60 }
61
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