--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/beans/PropertyChangeEvent.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,142 @@
+/*
+ * Copyright 1996-2006 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package java.beans;
+
+/**
+ * A "PropertyChange" event gets delivered whenever a bean changes a "bound"
+ * or "constrained" property.  A PropertyChangeEvent object is sent as an
+ * argument to the PropertyChangeListener and VetoableChangeListener methods.
+ * <P>
+ * Normally PropertyChangeEvents are accompanied by the name and the old
+ * and new value of the changed property.  If the new value is a primitive
+ * type (such as int or boolean) it must be wrapped as the
+ * corresponding java.lang.* Object type (such as Integer or Boolean).
+ * <P>
+ * Null values may be provided for the old and the new values if their
+ * true values are not known.
+ * <P>
+ * An event source may send a null object as the name to indicate that an
+ * arbitrary set of if its properties have changed.  In this case the
+ * old and new values should also be null.
+ */
+
+public class PropertyChangeEvent extends java.util.EventObject {
+
+    /**
+     * Constructs a new <code>PropertyChangeEvent</code>.
+     *
+     * @param source  The bean that fired the event.
+     * @param propertyName  The programmatic name of the property
+     *          that was changed.
+     * @param oldValue  The old value of the property.
+     * @param newValue  The new value of the property.
+     */
+    public PropertyChangeEvent(Object source, String propertyName,
+                                     Object oldValue, Object newValue) {
+        super(source);
+        this.propertyName = propertyName;
+        this.newValue = newValue;
+        this.oldValue = oldValue;
+    }
+
+    /**
+     * Gets the programmatic name of the property that was changed.
+     *
+     * @return  The programmatic name of the property that was changed.
+     *          May be null if multiple properties have changed.
+     */
+    public String getPropertyName() {
+        return propertyName;
+    }
+
+    /**
+     * Gets the new value for the property, expressed as an Object.
+     *
+     * @return  The new value for the property, expressed as an Object.
+     *          May be null if multiple properties have changed.
+     */
+    public Object getNewValue() {
+        return newValue;
+    }
+
+    /**
+     * Gets the old value for the property, expressed as an Object.
+     *
+     * @return  The old value for the property, expressed as an Object.
+     *          May be null if multiple properties have changed.
+     */
+    public Object getOldValue() {
+        return oldValue;
+    }
+
+    /**
+     * Sets the propagationId object for the event.
+     *
+     * @param propagationId  The propagationId object for the event.
+     */
+    public void setPropagationId(Object propagationId) {
+        this.propagationId = propagationId;
+    }
+
+    /**
+     * The "propagationId" field is reserved for future use.  In Beans 1.0
+     * the sole requirement is that if a listener catches a PropertyChangeEvent
+     * and then fires a PropertyChangeEvent of its own, then it should
+     * make sure that it propagates the propagationId field from its
+     * incoming event to its outgoing event.
+     *
+     * @return the propagationId object associated with a bound/constrained
+     *          property update.
+     */
+    public Object getPropagationId() {
+        return propagationId;
+    }
+
+    /**
+     * name of the property that changed.  May be null, if not known.
+     * @serial
+     */
+    private String propertyName;
+
+    /**
+     * New value for property.  May be null if not known.
+     * @serial
+     */
+    private Object newValue;
+
+    /**
+     * Previous value for property.  May be null if not known.
+     * @serial
+     */
+    private Object oldValue;
+
+    /**
+     * Propagation ID.  May be null.
+     * @serial
+     * @see #getPropagationId
+     */
+    private Object propagationId;
+}