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1   /*
2    * $Id: DelegatePropertyAccessor.java 1049696 2010-12-15 20:30:10Z apetrelli $
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   * http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  package org.apache.tiles.ognl;
23  
24  import java.util.Map;
25  
26  import ognl.OgnlContext;
27  import ognl.OgnlException;
28  import ognl.PropertyAccessor;
29  
30  /**
31   * Uses a {@link PropertyAccessorDelegateFactory} to delegate the methods to
32   * another {@link PropertyAccessor}.
33   *
34   * @param <T> The type of the accessed root object.
35   * @version $Rev: 1049696 $ $Date: 2010-12-16 07:30:10 +1100 (Thu, 16 Dec 2010) $
36   * @since 2.2.0
37   */
38  public class DelegatePropertyAccessor<T> implements PropertyAccessor {
39  
40      /**
41       * The property accessor factory.
42       *
43       * @since 2.2.0
44       */
45      private PropertyAccessorDelegateFactory<T> factory;
46  
47      /**
48       * Constructor.
49       *
50       * @param factory The property accessor factory.
51       * @since 2.2.0
52       */
53      public DelegatePropertyAccessor(PropertyAccessorDelegateFactory<T> factory) {
54          this.factory = factory;
55      }
56  
57      /** {@inheritDoc} */
58      @SuppressWarnings("unchecked")
59      public Object getProperty(@SuppressWarnings("rawtypes") Map context, Object target, Object name)
60              throws OgnlException {
61          return factory.getPropertyAccessor((String) name, (T) target).getProperty(
62                  context, target, name);
63      }
64  
65      /** {@inheritDoc} */
66      @SuppressWarnings("unchecked")
67      public void setProperty(@SuppressWarnings("rawtypes") Map context, Object target, Object name,
68              Object value) throws OgnlException {
69          factory.getPropertyAccessor((String) name, (T) target).setProperty(context,
70                  target, name, value);
71      }
72  
73      /** {@inheritDoc} */
74      @SuppressWarnings("unchecked")
75      public String getSourceAccessor(OgnlContext context, Object target,
76              Object index) {
77          return factory.getPropertyAccessor((String) index, (T) target)
78                  .getSourceAccessor(context, target, index);
79      }
80  
81      /** {@inheritDoc} */
82      @SuppressWarnings("unchecked")
83      public String getSourceSetter(OgnlContext context, Object target,
84              Object index) {
85          return factory.getPropertyAccessor((String) index, (T) target)
86                  .getSourceSetter(context, target, index);
87      }
88  }