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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    * http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" 
13   * BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
14   * See the License for the specific language governing permissions and 
15   * limitations under the License.
16   */
17  package org.apache.jetspeed.components.portletregistry;
18  
19  import java.lang.reflect.InvocationHandler;
20  import java.lang.reflect.InvocationTargetException;
21  import java.lang.reflect.Method;
22  import java.lang.reflect.Proxy;
23  
24  import org.apache.jetspeed.om.common.portlet.PortletDefinitionComposite;
25  
26  public class PortletDefinitionCompositeProxy implements InvocationHandler
27  {
28      private PortletDefinitionComposite def = null;
29      private static PortletRegistry registry;
30      private String name;
31      
32      public PortletDefinitionCompositeProxy(PortletDefinitionComposite def)
33      {
34          this.def = def;
35          this.name = def.getUniqueName();
36      }
37  
38      public static void setRegistry(PortletRegistry r)
39      {
40          registry = r;
41      }
42      
43      public static PortletDefinitionComposite createProxy(
44              PortletDefinitionComposite def)
45      {
46          Class[] proxyInterfaces = new Class[]
47          { PortletDefinitionComposite.class};
48          PortletDefinitionComposite proxy = (PortletDefinitionComposite) Proxy
49                  .newProxyInstance(PortletDefinitionComposite.class
50                          .getClassLoader(), proxyInterfaces,
51                          new PortletDefinitionCompositeProxy(def));
52          return proxy;
53      }
54  
55      protected void invalidate()
56      {
57          this.def = null;
58      }
59      
60      protected void setRealDefinition(PortletDefinitionComposite d)
61      {
62          this.def = d;
63      }
64      
65      protected PortletDefinitionComposite getRealApplication()
66      {
67          return def;
68      }
69      
70      public Object invoke(Object proxy, Method m, Object[] args)
71              throws Throwable
72      {
73          try 
74          {
75              if (def == null)
76              {
77                  def = registry.getPortletDefinitionByUniqueName(name);
78              }
79              return m.invoke(def, args);
80          } 
81          catch (InvocationTargetException e) 
82          {
83              throw e.getTargetException();
84          }
85      }
86  
87  }