J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2000-2003 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package java.util.prefs; |
| 27 | |
| 28 | import java.io.NotSerializableException; |
| 29 | |
| 30 | /** |
| 31 | * An event emitted by a <tt>Preferences</tt> node to indicate that |
| 32 | * a child of that node has been added or removed.<p> |
| 33 | * |
| 34 | * Note, that although NodeChangeEvent inherits Serializable interface from |
| 35 | * java.util.EventObject, it is not intended to be Serializable. Appropriate |
| 36 | * serialization methods are implemented to throw NotSerializableException. |
| 37 | * |
| 38 | * @author Josh Bloch |
| 39 | * @see Preferences |
| 40 | * @see NodeChangeListener |
| 41 | * @see PreferenceChangeEvent |
| 42 | * @since 1.4 |
| 43 | * @serial exclude |
| 44 | */ |
| 45 | |
| 46 | public class NodeChangeEvent extends java.util.EventObject { |
| 47 | /** |
| 48 | * The node that was added or removed. |
| 49 | * |
| 50 | * @serial |
| 51 | */ |
| 52 | private Preferences child; |
| 53 | |
| 54 | /** |
| 55 | * Constructs a new <code>NodeChangeEvent</code> instance. |
| 56 | * |
| 57 | * @param parent The parent of the node that was added or removed. |
| 58 | * @param child The node that was added or removed. |
| 59 | */ |
| 60 | public NodeChangeEvent(Preferences parent, Preferences child) { |
| 61 | super(parent); |
| 62 | this.child = child; |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * Returns the parent of the node that was added or removed. |
| 67 | * |
| 68 | * @return The parent Preferences node whose child was added or removed |
| 69 | */ |
| 70 | public Preferences getParent() { |
| 71 | return (Preferences) getSource(); |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * Returns the node that was added or removed. |
| 76 | * |
| 77 | * @return The node that was added or removed. |
| 78 | */ |
| 79 | public Preferences getChild() { |
| 80 | return child; |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * Throws NotSerializableException, since NodeChangeEvent objects are not |
| 85 | * intended to be serializable. |
| 86 | */ |
| 87 | private void writeObject(java.io.ObjectOutputStream out) |
| 88 | throws NotSerializableException { |
| 89 | throw new NotSerializableException("Not serializable."); |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * Throws NotSerializableException, since NodeChangeEvent objects are not |
| 94 | * intended to be serializable. |
| 95 | */ |
| 96 | private void readObject(java.io.ObjectInputStream in) |
| 97 | throws NotSerializableException { |
| 98 | throw new NotSerializableException("Not serializable."); |
| 99 | } |
| 100 | |
| 101 | // Defined so that this class isn't flagged as a potential problem when |
| 102 | // searches for missing serialVersionUID fields are done. |
| 103 | private static final long serialVersionUID = 8068949086596572957L; |
| 104 | } |