ProxyFactoryCGLIBImpl


1   package org.apache.ojb.broker.core.proxy;
2   
3   /* Copyright 2002-2005 The Apache Software Foundation
4    *
5    * Licensed under the Apache License, Version 2.0 (the "License");
6    * you may not use this file except in compliance with the License.
7    * 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" BASIS,
13   * 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  import java.util.HashMap  ;
18  
19  import net.sf.cglib.proxy.Callback;
20  import net.sf.cglib.proxy.Enhancer;
21  import net.sf.cglib.proxy.Factory;
22  
23  /**
24   * @author andrew.clute
25   *
26   */
27  public class ProxyFactoryCGLIBImpl extends AbstractProxyFactory {
28  
29      HashMap   proxyFactories = new HashMap  ();
30  
31      public Class   getDefaultIndirectionHandlerClass() {
32          return IndirectionHandlerCGLIBImpl.class;
33      }
34  
35      /**
36       * Returns the class of the base class that the given IndirectionHandler must extend/implement
37       * 
38       */
39      public Class   getIndirectionHandlerBaseClass() {
40          return IndirectionHandlerCGLIB.class;
41      }
42  
43      public OJBProxy createProxy(Class   proxyClass, IndirectionHandler handler) throws Exception   {
44  
45          Factory factory = (Factory)proxyFactories.get(proxyClass);
46          Object   result = null;
47          if (factory == null) {
48              Class  [] interfaces;
49              if (proxyClass.isInterface()) {
50                  interfaces = new Class  [] { proxyClass, OJBProxy.class };
51              } else {
52                  interfaces = new Class  [] { OJBProxy.class };
53              }
54  
55              result = (Factory)Enhancer.create(proxyClass, interfaces, (Callback)handler);
56              proxyFactories.put(proxyClass, result);
57          } else {
58              result = factory.newInstance((Callback)handler);
59          }
60          return (OJBProxy)result;
61      }
62  
63      public boolean isNormalOjbProxy(Object   proxyOrObject) {
64          return super.isNormalOjbProxy(proxyOrObject) && (proxyOrObject instanceof Factory);
65      }
66  
67      public IndirectionHandler getDynamicIndirectionHandler(Object   obj) {
68          return (IndirectionHandler)((Factory)obj).getCallbacks()[0];
69  
70      }
71  
72      public boolean interfaceRequiredForProxyGeneration() {
73          return false;
74      }
75      
76      
77  
78  }
79
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