1 /*
2 * $Id: NestedObjectDelegatePropertyAccessor.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 PropertyAccessor} as a delegate, but passing a nested object as
32 * target.
33 *
34 * @param <T> The root object type from which the target object will be
35 * extracted.
36 * @since 2.2.0
37 * @version $Rev: 1049696 $ $Date: 2010-12-16 07:30:10 +1100 (Thu, 16 Dec 2010) $
38 */
39 public class NestedObjectDelegatePropertyAccessor<T> implements
40 PropertyAccessor {
41
42 /**
43 * The extractor of the nested object.
44 *
45 * @since 2.2.0
46 */
47 private NestedObjectExtractor<T> nestedObjectExtractor;
48
49 /**
50 * The delegated property accessor.
51 *
52 * @since 2.2.0
53 */
54 private PropertyAccessor propertyAccessor;
55
56 /**
57 * Constructor.
58 *
59 * @param nestedObjectExtractor The extractor of the nested object.
60 * @param propertyAccessor The delegated property accessor.
61 * @since 2.2.0
62 */
63 public NestedObjectDelegatePropertyAccessor(
64 NestedObjectExtractor<T> nestedObjectExtractor,
65 PropertyAccessor propertyAccessor) {
66 this.nestedObjectExtractor = nestedObjectExtractor;
67 this.propertyAccessor = propertyAccessor;
68 }
69
70 /** {@inheritDoc} */
71 @SuppressWarnings("unchecked")
72 public Object getProperty(@SuppressWarnings("rawtypes") Map context, Object target, Object name)
73 throws OgnlException {
74 return propertyAccessor.getProperty(context, nestedObjectExtractor
75 .getNestedObject((T) target), name);
76 }
77
78 /** {@inheritDoc} */
79 @SuppressWarnings("unchecked")
80 public void setProperty(@SuppressWarnings("rawtypes") Map context, Object target, Object name,
81 Object value) throws OgnlException {
82 propertyAccessor.setProperty(context, nestedObjectExtractor
83 .getNestedObject((T) target), name, value);
84 }
85
86 /** {@inheritDoc} */
87 @SuppressWarnings("unchecked")
88 public String getSourceAccessor(OgnlContext context, Object target,
89 Object index) {
90 return propertyAccessor.getSourceAccessor(context,
91 nestedObjectExtractor.getNestedObject((T) target), index);
92 }
93
94 /** {@inheritDoc} */
95 @SuppressWarnings("unchecked")
96 public String getSourceSetter(OgnlContext context, Object target,
97 Object index) {
98 return propertyAccessor.getSourceSetter(context, nestedObjectExtractor
99 .getNestedObject((T) target), index);
100 }
101 }