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1   /*
2    * Copyright 1999-2004 The Apache Software Foundation
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *     http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.apache.commons.jxpath;
17  
18  import java.util.Iterator;
19  import java.util.Map;
20  import java.util.Set;
21  
22  /***
23   * Implements the DynamicPropertyHandler interface for java.util.Map.
24   *
25   * @author Dmitri Plotnikov
26   * @version $Revision: 1.7 $ $Date: 2004/03/02 01:03:14 $
27   */
28  public class MapDynamicPropertyHandler implements DynamicPropertyHandler {
29  
30      private static final String[] STRING_ARRAY = new String[0];
31  
32      /***
33       * Returns string representations of all keys in the map.
34       */
35      public String[] getPropertyNames(Object object) {
36          Map map = (Map) object;
37          Set set = map.keySet();
38          String names[] = new String[set.size()];
39          Iterator it = set.iterator();
40          for (int i = 0; i < names.length; i++) {
41              names[i] = String.valueOf(it.next());
42          }
43          return names;
44      }
45  
46      /***
47       * Returns the value for the specified key.
48       */
49      public Object getProperty(Object object, String propertyName) {
50          return ((Map) object).get(propertyName);
51      }
52  
53      /***
54       * Sets the specified key value.
55       */
56      public void setProperty(Object object, String propertyName, Object value) {
57          ((Map) object).put(propertyName, value);
58      }
59  }