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" 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  package javax.jdo;
18  
19  import java.lang.reflect.InvocationHandler;
20  import java.lang.reflect.Method;
21  import java.lang.reflect.Proxy;
22  
23  /**
24   * 
25   * <p>
26   */
27  public class PMFProxy implements InvocationHandler {
28  
29      private String connectionDriverName;
30  
31      public static PersistenceManagerFactory newInstance() {
32          PersistenceManagerFactory pmf =
33                 (PersistenceManagerFactory) Proxy.newProxyInstance(
34                  PMFProxy.class.getClassLoader(),
35                  new Class[]{PersistenceManagerFactory.class},
36                  new PMFProxy());
37          return pmf;
38      }
39  
40      /*
41       *
42       */
43      public Object invoke(Object proxy, Method m, Object[] args)
44              throws Exception {
45          Object result = null;
46  
47          if (m.getName().equals("getConnectionDriverName")) {
48              result = connectionDriverName;
49          } else if (m.getName().equals("setConnectionDriverName")) {
50              connectionDriverName = (String) args[0];
51          } else {
52              throw new Exception(
53                      "Unexpected invocation of method: " + m);
54          }
55          return result;
56      }
57  }
58