DefaultValuePropertyProcessor


1   /* ***** BEGIN LICENSE BLOCK *****
2    * Version: MPL 1.1
3    * The contents of this file are subject to the Mozilla Public License Version
4    * 1.1 (the "License"); you may not use this file except in compliance with
5    * the License. You may obtain a copy of the License at
6    * http://www.mozilla.org/MPL/
7    * 
8    * Software distributed under the License is distributed on an "AS IS" basis,
9    * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
10   * for the specific language governing rights and limitations under the
11   * License.
12   * 
13   * The Original Code is Riot.
14   * 
15   * The Initial Developer of the Original Code is
16   * Neteye GmbH.
17   * Portions created by the Initial Developer are Copyright (C) 2006
18   * the Initial Developer. All Rights Reserved.
19   * 
20   * Contributor(s):
21   *   Felix Gnass [fgnass at neteye dot de]
22   * 
23   * ***** END LICENSE BLOCK ***** */
24  package org.riotfamily.components.property;
25  
26  import java.util.Enumeration  ;
27  import java.util.Map  ;
28  import java.util.Properties  ;
29  
30  /**
31   * PropertyProcessor that initializes properties with the specified default 
32   * values.
33   */
34  public class DefaultValuePropertyProcessor extends PropertyProcessorAdapter {
35  
36      private Properties   values;
37      
38      public void setValues(Properties   values) {
39          this.values = values;
40      }
41  
42      /**
43       * Iterates over the defaults and checks whether a value is already set.
44       * If no matching entry is found in the map, the default value is added
45       * to the map. 
46       */
47      public void resolveStrings(Map   map) {
48          if (values != null) {
49              Enumeration   en = values.propertyNames();
50              while (en.hasMoreElements()) {
51                  String   prop = (String  ) en.nextElement();
52                  if (!map.containsKey(prop)) {
53                      map.put(prop, values.getProperty(prop));
54                  }
55              }
56          }
57      }
58  
59  }
60
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