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Java > Open Source Codes > org > jboss > spring > interceptor > SpringInjectionInterceptor


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
23 package org.jboss.spring.interceptor;
24
25 import org.jboss.aop.advice.Interceptor;
26 import org.jboss.aop.joinpoint.ConstructorInvocation;
27 import org.jboss.aop.joinpoint.Invocation;
28 import org.jboss.spring.support.SpringInjectionSupport;
29
30 /**
31  * Injects Spring beans on ConstructorInterceptor invocation.
32  * Should be the last interceptor in chain since it actually constructs EJB object
33  * (in order to inject beans).
34  *
35  * @author <a HREF="mailto:ales.justin@genera-lynx.com">Ales Justin</a>
36  * @see SpringInjectionSupport
37  */
38 public class SpringInjectionInterceptor extends SpringInjectionSupport implements Interceptor
39 {
40
41    public SpringInjectionInterceptor()
42    {
43       log.info("Instantiating " + getName());
44    }
45
46    public String JavaDoc getName()
47    {
48       return "SpringInjectionInterceptor";
49    }
50
51    public Object JavaDoc invoke(Invocation invocation) throws Throwable JavaDoc
52    {
53       if (!(invocation instanceof ConstructorInvocation))
54       {
55          throw new IllegalArgumentException JavaDoc("This interceptor is meant to be applied" +
56                " only on new instantiation of @Spring annotated objects");
57       }
58       Object JavaDoc target = invocation.invokeNext();
59       inject(target);
60       return target;
61    }
62
63 }
64
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