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1   /*
2    * Copyright 2005,2009 Ivan SZKIBA
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.ini4j.sample;
17  
18  //<editor-fold defaultstate="collapsed" desc="apt documentation">
19  //|
20  //|                             --------------
21  //|                             ListenerSample
22  //|
23  //|ListenerSample
24  //|
25  //| This advanced sample presents the event-controlled usage. The \[ini4j\]
26  //| library fully supports the events defined in Preferences API.
27  //|
28  //| This sample program expect the .ini file as a command line argument.
29  //| If there is no such argument, it use the {{{dwarfs.ini.html}dwarfs.ini}} file.
30  //|
31  //</editor-fold>
32  //{
33  import org.ini4j.IniPreferences;
34  
35  import java.io.FileInputStream;
36  
37  import java.util.prefs.*;
38  
39  public class ListenerSample
40  {
41      public static final String FILENAME = "dwarfs.ini";
42  
43      public static void main(String[] args) throws Exception
44      {
45          String filename = (args.length > 0) ? args[0] : FILENAME;
46          Preferences prefs = new IniPreferences(new FileInputStream(filename));
47          Listener listener = new Listener();
48  
49          prefs.addNodeChangeListener(listener);
50          Preferences jerry = prefs.node("jerry");
51  
52          jerry.addPreferenceChangeListener(listener);
53          jerry.put("color", "blue");
54          jerry.put("color", "gray");
55          jerry.putInt("age", 2);
56      }
57  
58      static class Listener implements NodeChangeListener, PreferenceChangeListener
59      {
60          public void childAdded(NodeChangeEvent event)
61          {
62              System.out.println("node added: " + event.getChild().name());
63          }
64  
65          public void childRemoved(NodeChangeEvent event)
66          {
67              System.out.println("node removed: " + event.getChild().name());
68          }
69  
70          public void preferenceChange(PreferenceChangeEvent event)
71          {
72              System.out.println("preference changed: " + event.getKey() + " = " + event.getNewValue());
73          }
74      }
75  }
76  //}