/*
* Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*
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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;
}