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


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.ejb.TransactionManagementType JavaDoc;
26 import javax.transaction.UserTransaction JavaDoc;
27 import org.jboss.aop.Advisor;
28 import org.jboss.ejb3.BeanContext;
29 import org.jboss.ejb3.Container;
30 import org.jboss.ejb3.tx.TxUtil;
31 import org.jboss.ejb3.tx.UserTransactionImpl;
32
33 /**
34  * Comment
35  *
36  * @author <a HREF="mailto:bill@jboss.org">Bill Burke</a>
37  * @version $Revision: 46510 $
38  */
39 public class UserTransactionFieldInjector implements Injector
40 {
41    private Field JavaDoc field;
42
43    public UserTransactionFieldInjector(Field JavaDoc field, InjectionContainer container)
44    {
45       if (container instanceof Container)
46       {
47          TransactionManagementType JavaDoc type = TxUtil.getTransactionManagementType(((Advisor) container));
48          if (type != TransactionManagementType.BEAN)
49             throw new IllegalStateException JavaDoc("Container " + ((Container) container).getEjbName() + ": it is illegal to inject UserTransaction into a CMT bean");
50       }
51       this.field = field;
52       this.field.setAccessible(true);
53    }
54
55    public void inject(BeanContext ctx)
56    {
57       Object JavaDoc instance = ctx.getInstance();
58       inject(instance);
59    }
60
61    public void inject(Object JavaDoc instance)
62    {
63       UserTransaction JavaDoc ut = new UserTransactionImpl();
64       try
65       {
66          field.set(instance, ut);
67       }
68       catch (IllegalAccessException JavaDoc e)
69       {
70          throw new RuntimeException JavaDoc(e); //To change body of catch statement use Options | File Templates.
71 }
72       catch (IllegalArgumentException JavaDoc e)
73       {
74          throw new RuntimeException JavaDoc("Failed in setting EntityManager on setter field: " + field.toString());
75       }
76    }
77
78    public Class JavaDoc getInjectionClass()
79    {
80       return field.getType();
81    }
82 }
83
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