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1   /*
2    * $Id: CombinedBeanInfo.java 995228 2010-09-08 19:50:09Z 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.util;
23  
24  import java.beans.FeatureDescriptor;
25  import java.beans.PropertyDescriptor;
26  import java.util.ArrayList;
27  import java.util.LinkedHashMap;
28  import java.util.List;
29  import java.util.Map;
30  import java.util.Set;
31  
32  import org.apache.tiles.request.reflect.ClassUtil;
33  
34  /**
35   * Contains the bean infos about one or more classes.
36   *
37   * @version $Rev: 995228 $ $Date: 2010-09-09 05:50:09 +1000 (Thu, 09 Sep 2010) $
38   * @since 2.2.0
39   */
40  public class CombinedBeanInfo {
41      /**
42       * The descriptors of the introspected classes.
43       */
44      private List<FeatureDescriptor> descriptors;
45  
46      /**
47       * Maps analyzed classes to the map of introspected properties.
48       */
49      private Map<Class<?>, Map<String, PropertyDescriptor>> class2descriptors;
50  
51      /**
52       * Constructor.
53       * @param clazzes The list of classes to analyze and combine.
54       *
55       * @since 2.2.0
56       */
57      public CombinedBeanInfo(Class<?>... clazzes) {
58          descriptors = new ArrayList<FeatureDescriptor>();
59          class2descriptors = new LinkedHashMap<Class<?>, Map<String, PropertyDescriptor>>();
60          for (int i = 0; i < clazzes.length; i++) {
61              Class<?> clazz = clazzes[i];
62              Map<String, PropertyDescriptor> mappedDescriptors = new LinkedHashMap<String, PropertyDescriptor>();
63              ClassUtil.collectBeanInfo(clazz, mappedDescriptors);
64              descriptors.addAll(mappedDescriptors.values());
65              class2descriptors.put(clazz, mappedDescriptors);
66          }
67      }
68  
69      /**
70       * Returns the descriptors of all the introspected classes.
71       *
72       * @return The feature descriptors.
73       * @since 2.2.0
74       */
75      public List<FeatureDescriptor> getDescriptors() {
76          return descriptors;
77      }
78  
79      /**
80       * Returns a map of the introspected properties for the given class.
81       *
82       * @param clazz The class to get the properties from.
83       * @return The map of property descriptors.
84       * @since 2.2.0
85       */
86      public Map<String, PropertyDescriptor> getMappedDescriptors(Class<?> clazz) {
87          return class2descriptors.get(clazz);
88      }
89  
90      /**
91       * Returns the set of properties for the given introspected class.
92       *
93       * @param clazz The class to get the properties from.
94       * @return The set of properties.
95       * @since 2.2.0
96       */
97      public Set<String> getProperties(Class<?> clazz) {
98          return class2descriptors.get(clazz).keySet();
99      }
100 }