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Java > Open Source Codes > org > jboss > injection > DependsFieldInjector


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.injection;
23
24 import java.lang.reflect.Field JavaDoc;
25 import javax.management.MBeanServer JavaDoc;
26 import javax.management.MBeanServerFactory JavaDoc;
27 import javax.management.ObjectName JavaDoc;
28 import org.jboss.ejb3.BeanContext;
29 import org.jboss.mx.util.MBeanProxyExt;
30
31 /**
32  * @author <a HREF="mailto:kabir.khan@jboss.org">Kabir Khan</a>
33  * @version $Revision: 46510 $
34  */
35 public class DependsFieldInjector implements Injector
36 {
37    Field JavaDoc field;
38    ObjectName JavaDoc on;
39
40    public DependsFieldInjector(Field JavaDoc field, ObjectName JavaDoc on)
41    {
42       this.field = field;
43       this.on = on;
44       field.setAccessible(true);
45    }
46
47    public void inject(BeanContext ctx)
48    {
49       Object JavaDoc instance = ctx.getInstance();
50       inject(instance);
51    }
52
53    public void inject(Object JavaDoc instance)
54    {
55       Class JavaDoc clazz = field.getType();
56       Object JavaDoc value = null;
57
58       if (clazz == ObjectName JavaDoc.class)
59       {
60          value = on;
61       }
62       else
63       {
64          MBeanServer JavaDoc server = (MBeanServer JavaDoc) MBeanServerFactory.findMBeanServer(null).get(0);
65          value = MBeanProxyExt.create(clazz, on, server);
66       }
67
68       try
69       {
70          field.set(instance, value);
71       }
72       catch (IllegalAccessException JavaDoc e)
73       {
74          throw new RuntimeException JavaDoc(e);
75       }
76    }
77
78    public Class JavaDoc getInjectionClass()
79    {
80       return field.getType();
81    }
82 }
83
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