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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" 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  
18  package org.apache.commons.proxy.provider;
19  
20  import org.apache.commons.proxy.ObjectProvider;
21  
22  /**
23   * Returns the result of the inner {@link ObjectProvider provider}.  Subclasses can override the {@link #getObject()}
24   * method and decorate what comes back from the inner provider in some way (by {@link SingletonProvider caching it} for
25   * example). 
26   * 
27   * @author James Carman
28   * @since 1.0
29   */
30  public class ProviderDecorator implements ObjectProvider
31  {
32  //----------------------------------------------------------------------------------------------------------------------
33  // Fields
34  //----------------------------------------------------------------------------------------------------------------------
35  
36      protected ObjectProvider inner;
37  
38  //----------------------------------------------------------------------------------------------------------------------
39  // Constructors
40  //----------------------------------------------------------------------------------------------------------------------
41  
42      public ProviderDecorator( ObjectProvider inner )
43      {
44          this.inner = inner;
45      }
46  
47  //----------------------------------------------------------------------------------------------------------------------
48  // ObjectProvider Implementation
49  //----------------------------------------------------------------------------------------------------------------------
50  
51      public Object getObject()
52      {
53          return inner.getObject();
54      }
55  }
56