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