| /* |
| * Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.util.prefs; |
| |
| import java.io.NotSerializableException; |
| |
| /** |
| * An event emitted by a <tt>Preferences</tt> node to indicate that |
| * a preference has been added, removed or has had its value changed.<p> |
| * |
| * Note, that although PreferenceChangeEvent inherits Serializable interface |
| * from EventObject, it is not intended to be Serializable. Appropriate |
| * serialization methods are implemented to throw NotSerializableException. |
| * |
| * @author Josh Bloch |
| * @see Preferences |
| * @see PreferenceChangeListener |
| * @see NodeChangeEvent |
| * @since 1.4 |
| * @serial exclude |
| */ |
| public class PreferenceChangeEvent extends java.util.EventObject { |
| |
| /** |
| * Key of the preference that changed. |
| * |
| * @serial |
| */ |
| private String key; |
| |
| /** |
| * New value for preference, or <tt>null</tt> if it was removed. |
| * |
| * @serial |
| */ |
| private String newValue; |
| |
| /** |
| * Constructs a new <code>PreferenceChangeEvent</code> instance. |
| * |
| * @param node The Preferences node that emitted the event. |
| * @param key The key of the preference that was changed. |
| * @param newValue The new value of the preference, or <tt>null</tt> |
| * if the preference is being removed. |
| */ |
| public PreferenceChangeEvent(Preferences node, String key, |
| String newValue) { |
| super(node); |
| this.key = key; |
| this.newValue = newValue; |
| } |
| |
| /** |
| * Returns the preference node that emitted the event. |
| * |
| * @return The preference node that emitted the event. |
| */ |
| public Preferences getNode() { |
| return (Preferences) getSource(); |
| } |
| |
| /** |
| * Returns the key of the preference that was changed. |
| * |
| * @return The key of the preference that was changed. |
| */ |
| public String getKey() { |
| return key; |
| } |
| |
| /** |
| * Returns the new value for the preference. |
| * |
| * @return The new value for the preference, or <tt>null</tt> if the |
| * preference was removed. |
| */ |
| public String getNewValue() { |
| return newValue; |
| } |
| |
| /** |
| * Throws NotSerializableException, since NodeChangeEvent objects |
| * are not intended to be serializable. |
| */ |
| private void writeObject(java.io.ObjectOutputStream out) |
| throws NotSerializableException { |
| throw new NotSerializableException("Not serializable."); |
| } |
| |
| /** |
| * Throws NotSerializableException, since PreferenceChangeEvent objects |
| * are not intended to be serializable. |
| */ |
| private void readObject(java.io.ObjectInputStream in) |
| throws NotSerializableException { |
| throw new NotSerializableException("Not serializable."); |
| } |
| |
| // Defined so that this class isn't flagged as a potential problem when |
| // searches for missing serialVersionUID fields are done. |
| private static final long serialVersionUID = 793724513368024975L; |
| } |