001/*
002 * Copyright 2005,2009 Ivan SZKIBA
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.ini4j.sample;
017
018//<editor-fold defaultstate="collapsed" desc="apt documentation">
019//|
020//|                             --------------
021//|                             ListenerSample
022//|
023//|ListenerSample
024//|
025//| This advanced sample presents the event-controlled usage. The \[ini4j\]
026//| library fully supports the events defined in Preferences API.
027//|
028//| This sample program expect the .ini file as a command line argument.
029//| If there is no such argument, it use the {{{dwarfs.ini.html}dwarfs.ini}} file.
030//|
031//</editor-fold>
032//{
033import org.ini4j.IniPreferences;
034
035import java.io.FileInputStream;
036
037import java.util.prefs.*;
038
039public class ListenerSample
040{
041    public static final String FILENAME = "dwarfs.ini";
042
043    public static void main(String[] args) throws Exception
044    {
045        String filename = (args.length > 0) ? args[0] : FILENAME;
046        Preferences prefs = new IniPreferences(new FileInputStream(filename));
047        Listener listener = new Listener();
048
049        prefs.addNodeChangeListener(listener);
050        Preferences jerry = prefs.node("jerry");
051
052        jerry.addPreferenceChangeListener(listener);
053        jerry.put("color", "blue");
054        jerry.put("color", "gray");
055        jerry.putInt("age", 2);
056    }
057
058    static class Listener implements NodeChangeListener, PreferenceChangeListener
059    {
060        public void childAdded(NodeChangeEvent event)
061        {
062            System.out.println("node added: " + event.getChild().name());
063        }
064
065        public void childRemoved(NodeChangeEvent event)
066        {
067            System.out.println("node removed: " + event.getChild().name());
068        }
069
070        public void preferenceChange(PreferenceChangeEvent event)
071        {
072            System.out.println("preference changed: " + event.getKey() + " = " + event.getNewValue());
073        }
074    }
075}
076//}