KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > jboss > ejb3 > mdb > CurrentMessageInjectorInterceptor


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.ejb3.mdb;
23
24 import java.lang.reflect.Field JavaDoc;
25 import java.lang.reflect.Method JavaDoc;
26 import org.jboss.aop.advice.Interceptor;
27 import org.jboss.aop.joinpoint.Invocation;
28 import org.jboss.logging.Logger;
29
30 /**
31  * Comment
32  *
33  * @author <a HREF="mailto:bill@jboss.org">Bill Burke</a>
34  * @version $Revision: 37459 $
35  */
36 public class CurrentMessageInjectorInterceptor implements Interceptor
37 {
38    protected final static Logger log = Logger.getLogger(CurrentMessageInjectorInterceptor.class);
39    
40    private Field JavaDoc[] fields;
41    private Method JavaDoc[] methods;
42
43    public CurrentMessageInjectorInterceptor(Field JavaDoc[] fields, Method JavaDoc[] methods)
44    {
45       this.fields = fields;
46       if (fields != null)
47       {
48          for (Field JavaDoc field : fields)
49          {
50             field.setAccessible(true);
51          }
52       }
53       this.methods = methods;
54       if (methods != null)
55       {
56          for (Method JavaDoc method : methods)
57          {
58             method.setAccessible(true);
59          }
60       }
61    }
62
63
64    public String JavaDoc getName()
65    {
66       return this.getClass().getName();
67    }
68
69    public Object JavaDoc invoke(Invocation invocation) throws Throwable JavaDoc
70    {
71       Object JavaDoc target = invocation.getTargetObject();
72       Object JavaDoc message = invocation.getMetaData().getMetaData(ConsumerContainer.CONSUMER_MESSAGE, ConsumerContainer.CONSUMER_MESSAGE);
73       if (fields != null)
74       {
75          for (Field JavaDoc field : fields)
76          {
77             field.set(target, message);
78          }
79       }
80       if (methods != null)
81       {
82          for (Method JavaDoc method : methods)
83          {
84             method.invoke(target, message);
85          }
86
87       }
88       try
89       {
90       return invocation.invokeNext();
91       }
92       finally
93       {
94          // clear so we don't leak.
95 if (fields != null)
96          {
97             for (Field JavaDoc field : fields)
98             {
99                field.set(target, null);
100             }
101          }
102          if (methods != null)
103          {
104             for (Method JavaDoc method : methods)
105             {
106                Object JavaDoc[] args = new Object JavaDoc[method.getParameterTypes().length];
107                for (int i = 0 ; i < args.length; ++i)
108                   args[i] = null;
109                method.invoke(target, args);
110             }
111          }
112       }
113    }
114 }
115
Popular Tags