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From-SVN: r102074

1 files changed, 105 insertions, 0 deletions

diff --git a/libjava/classpath/java/util/prefs/PreferenceChangeEvent.java b/libjava/classpath/java/util/prefs/PreferenceChangeEvent.java
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+/* PreferenceChangeEvent - ObjectEvent fired when a Preferences entry changes
+   Copyright (C) 2001 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+ 
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+package java.util.prefs;
+
+import java.util.EventObject;
+
+/**
+ * ObjectEvent fired when a Preferences entry changes.
+ * This event is generated when a entry is added, changed or removed.
+ * When an entry is removed then <code>getNewValue</code> will return null.
+ * <p>
+ * Preference change events are only generated for entries in one particular
+ * preference node. Notification of subnode addition/removal is given by a
+ * <code>NodeChangeEvent</code>.
+ *
+ * @since 1.4
+ * @author Mark Wielaard (mark@klomp.org)
+ */
+public class PreferenceChangeEvent extends EventObject {
+
+  private static final long serialVersionUID = 793724513368024975L;
+  
+    /**
+     * The key of the changed entry.
+     */
+    private final String key;
+
+    /**
+     * The new value of the changed entry, or null when the entry was removed.
+     */
+    private final String newValue;
+
+    /**
+     * Creates a new PreferenceChangeEvent.
+     *
+     * @param node The source preference node for which an entry was added,
+     * changed or removed
+     * @param key The key of the entry that was added, changed or removed
+     * @param value The new value of the entry that was added or changed, or
+     * null when the entry was removed
+     */
+    public PreferenceChangeEvent(Preferences node, String key, String value) {
+        super(node);
+        this.key = key;
+        this.newValue = value;
+    }
+
+    /**
+     * Returns the source Preference node from which an entry was added,
+     * changed or removed.
+     */
+    public Preferences getNode() {
+        return (Preferences) source;
+    }
+
+    /**
+     * Returns the key of the entry that was added, changed or removed.
+     */
+    public String getKey() {
+        return key;
+    }
+
+    /**
+     * Returns the new value of the entry that was added or changed, or
+     * returns null when the entry was removed.
+     */
+    public String getNewValue() {
+        return newValue;
+    }
+}