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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  }