| // Licensed to the Apache Software Foundation (ASF) under one or more contributor |
| // license agreements. See the NOTICE.txt file distributed with this work for |
| // additional information regarding copyright ownership. The ASF licenses this |
| // file to you under the Apache License, Version 2.0 (the "License"); you may not |
| // use this file except in compliance with the License. You may obtain a copy of |
| // the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| // License for the specific language governing permissions and limitations under |
| // the License. |
| |
| package org.apache.oodt.commons.util; |
| |
| import java.util.*; |
| import java.beans.*; |
| |
| /** Property manager manages updates to properties. |
| * |
| * @author Kelly |
| */ |
| public class PropertyMgr { |
| /** Add a listener for property changes. |
| * |
| * @param listener Listener to add. |
| */ |
| public static void addPropertyChangeListener(PropertyChangeListener listener) { |
| listeners.add(listener); |
| } |
| |
| /** Remove a listener's interest in property changes. |
| * |
| * @param listener Listener to remove. |
| */ |
| public static void removePropertyChangeListener(PropertyChangeListener listener) { |
| listeners.remove(listener); |
| } |
| |
| /** Set a property and notify listeners. |
| * |
| * @param key Property's name. |
| * @param value New property's value. |
| */ |
| public static void setProperty(String key, String value) { |
| String oldValue = System.getProperty(key); |
| System.setProperty(key, value); |
| if (!listeners.isEmpty()) { |
| PropertyChangeEvent event = new PropertyChangeEvent(System.getProperties(), key, oldValue, value); |
| for (Iterator i = listeners.iterator(); i.hasNext();) { |
| PropertyChangeListener listener = (PropertyChangeListener) i.next(); |
| listener.propertyChange(event); |
| } |
| } |
| } |
| |
| /** Property change listeners. */ |
| private static List listeners = new ArrayList(); |
| } |