126 lines
4.1 KiB
Java
126 lines
4.1 KiB
Java
/*
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* Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package java.util.prefs;
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import java.io.NotSerializableException;
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/**
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* An event emitted by a <tt>Preferences</tt> node to indicate that
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* a preference has been added, removed or has had its value changed.<p>
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*
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* Note, that although PreferenceChangeEvent inherits Serializable interface
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* from EventObject, it is not intended to be Serializable. Appropriate
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* serialization methods are implemented to throw NotSerializableException.
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*
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* @author Josh Bloch
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* @see Preferences
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* @see PreferenceChangeListener
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* @see NodeChangeEvent
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* @since 1.4
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* @serial exclude
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*/
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public class PreferenceChangeEvent extends java.util.EventObject {
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/**
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* Key of the preference that changed.
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*
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* @serial
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*/
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private String key;
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/**
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* New value for preference, or <tt>null</tt> if it was removed.
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*
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* @serial
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*/
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private String newValue;
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/**
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* Constructs a new <code>PreferenceChangeEvent</code> instance.
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*
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* @param node The Preferences node that emitted the event.
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* @param key The key of the preference that was changed.
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* @param newValue The new value of the preference, or <tt>null</tt>
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* if the preference is being removed.
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*/
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public PreferenceChangeEvent(Preferences node, String key,
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String newValue) {
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super(node);
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this.key = key;
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this.newValue = newValue;
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}
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/**
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* Returns the preference node that emitted the event.
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*
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* @return The preference node that emitted the event.
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*/
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public Preferences getNode() {
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return (Preferences) getSource();
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}
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/**
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* Returns the key of the preference that was changed.
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*
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* @return The key of the preference that was changed.
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*/
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public String getKey() {
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return key;
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}
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/**
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* Returns the new value for the preference.
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*
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* @return The new value for the preference, or <tt>null</tt> if the
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* preference was removed.
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*/
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public String getNewValue() {
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return newValue;
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}
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/**
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* Throws NotSerializableException, since NodeChangeEvent objects
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* are not intended to be serializable.
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*/
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private void writeObject(java.io.ObjectOutputStream out)
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throws NotSerializableException {
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throw new NotSerializableException("Not serializable.");
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}
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/**
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* Throws NotSerializableException, since PreferenceChangeEvent objects
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* are not intended to be serializable.
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*/
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private void readObject(java.io.ObjectInputStream in)
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throws NotSerializableException {
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throw new NotSerializableException("Not serializable.");
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}
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// Defined so that this class isn't flagged as a potential problem when
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// searches for missing serialVersionUID fields are done.
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private static final long serialVersionUID = 793724513368024975L;
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}
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