| /* PreferenceChangeEvent - ObjectEvent fired when a Preferences entry changes |
| Copyright (C) 2001, 2006 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package java.util.prefs; |
| |
| import java.io.IOException; |
| import java.io.NotSerializableException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.util.EventObject; |
| |
| /** |
| * ObjectEvent fired when a Preferences entry changes. |
| * This event is generated when a entry is added, changed or removed. |
| * When an entry is removed then <code>getNewValue</code> will return null. |
| * <p> |
| * Preference change events are only generated for entries in one particular |
| * preference node. Notification of subnode addition/removal is given by a |
| * <code>NodeChangeEvent</code>. |
| * <p> |
| * Note that although this class is marked as serializable, attempts to |
| * serialize it will fail with NotSerializableException. |
| * |
| * @since 1.4 |
| * @author Mark Wielaard (mark@klomp.org) |
| */ |
| public class PreferenceChangeEvent extends EventObject { |
| |
| // We have this to placate the compiler. |
| private static final long serialVersionUID = 793724513368024975L; |
| |
| /** |
| * The key of the changed entry. |
| */ |
| private final String key; |
| |
| /** |
| * The new value of the changed entry, or null when the entry was removed. |
| */ |
| private final String newValue; |
| |
| /** |
| * Creates a new PreferenceChangeEvent. |
| * |
| * @param node The source preference node for which an entry was added, |
| * changed or removed |
| * @param key The key of the entry that was added, changed or removed |
| * @param value The new value of the entry that was added or changed, or |
| * null when the entry was removed |
| */ |
| public PreferenceChangeEvent(Preferences node, String key, String value) { |
| super(node); |
| this.key = key; |
| this.newValue = value; |
| } |
| |
| /** |
| * Returns the source Preference node from which an entry was added, |
| * changed or removed. |
| */ |
| public Preferences getNode() { |
| return (Preferences) source; |
| } |
| |
| /** |
| * Returns the key of the entry that was added, changed or removed. |
| */ |
| public String getKey() { |
| return key; |
| } |
| |
| /** |
| * Returns the new value of the entry that was added or changed, or |
| * returns null when the entry was removed. |
| */ |
| public String getNewValue() { |
| return newValue; |
| } |
| |
| private void readObject(ObjectInputStream ois) |
| throws IOException |
| { |
| throw new NotSerializableException("LineEvent is not serializable"); |
| } |
| |
| private void writeObject(ObjectOutputStream oos) |
| throws IOException |
| { |
| throw new NotSerializableException("LineEvent is not serializable"); |
| } |
| } |