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Java > Open Source Codes > org > jboss > mx > metadata > xb > InterceptorHolder


1 /*
2 * JBoss, Home of Professional Open Source
3 * Copyright 2006, 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.mx.metadata.xb;
23
24 import org.jboss.mx.interceptor.Interceptor;
25 import org.jboss.util.NestedRuntimeException;
26 import org.jboss.xb.binding.GenericValueContainer;
27
28 import javax.xml.namespace.QName JavaDoc;
29
30 /**
31  A container for the interceptor elements.
32  
33  @author Scott.Stark@jboss.org
34  @version $Revision: 42150 $
35  */

36 public class InterceptorHolder
37    implements GenericValueContainer
38 {
39    private Class JavaDoc clazz;
40
41    public void addChild(QName JavaDoc name, Object JavaDoc value)
42    {
43       String JavaDoc lname = name.getLocalPart();
44       if( lname.equals("code") )
45       {
46          ClassLoader JavaDoc loader = Thread.currentThread().getContextClassLoader();
47          String JavaDoc cname = (String JavaDoc) value;
48          try
49          {
50             clazz = loader.loadClass(cname);
51          }
52          catch(Throwable JavaDoc e)
53          {
54             throw new NestedRuntimeException("Unable to load code: "+cname, e);
55          }
56       }
57    }
58
59    public Object JavaDoc instantiate()
60    {
61       Interceptor i;
62       // todo: Check for a ctor()
63
try
64       {
65          i = (Interceptor) clazz.newInstance();
66       }
67       catch (Throwable JavaDoc e)
68       {
69          throw new NestedRuntimeException("Failed to instantiate interceptor", e);
70       }
71       return i;
72    }
73
74    public Class JavaDoc getTargetClass()
75    {
76       return Interceptor.class;
77    }
78 }
79
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