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125 lines
4.1 KiB
Java
125 lines
4.1 KiB
Java
/* java.beans.PropertyChangeEvent
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Copyright (C) 1998, 2000 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., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 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.beans;
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/**
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** PropertyChangeEvents are fired in the PropertyChange
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** and VetoableChange event classes. They represent the
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** old and new values as well as the source Bean.<P>
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**
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** If the old or new value is a primitive type, it must
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** be wrapped in the appropriate wrapper type
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** (java.lang.Integer for int, etc., etc.).<P>
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**
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** If the old or new values are unknown (although why
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** that would be I do not know), they may be null.<P>
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**
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** Right now Sun put in a propagationId, reserved for
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** future use. Read the comments on the constructor
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** and on setPropagationId for more information.
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**
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** @author John Keiser
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** @since JDK1.1
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** @version 1.1.0, 29 Jul 1998
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**/
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public class PropertyChangeEvent extends java.util.EventObject {
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String propertyName;
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Object oldValue;
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Object newValue;
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Object propagationId;
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private static final long serialVersionUID = 7042693688939648123L;
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/** Create a new PropertyChangeEvent. Remember that if
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** you received a PropertyChangeEvent and are sending
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** a new one, you should also set the propagation ID
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** from the old PropertyChangeEvent.
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** @param source the Bean containing the property.
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** @param propertyName the property's name.
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** @param oldValue the old value of the property.
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** @param newValue the new value of the property.
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**/
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public PropertyChangeEvent(Object source, String propertyName, Object oldVal, Object newVal) {
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super(source);
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this.propertyName = propertyName;
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oldValue = oldVal;
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newValue = newVal;
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}
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/** Get the property name.
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** @return the property name.
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**/
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public String getPropertyName() {
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return propertyName;
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}
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/** Get the property's old value.
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** @return the property's old value.
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**/
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public Object getOldValue() {
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return oldValue;
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}
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/** Get the property's new value.
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** @return the property's new value.
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**/
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public Object getNewValue() {
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return newValue;
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}
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/** Set the propagation ID. This is a way for the event
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** to be passed from hand to hand and retain a little
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** extra state. Right now it is unused, but it should
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** be propagated anyway so that future versions of
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** JavaBeans can use it, for God knows what.
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** @param propagationId the propagation ID.
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**/
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public void setPropagationId(Object propagationId) {
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this.propagationId = propagationId;
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}
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/** Get the propagation ID.
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** @return the propagation ID.
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**/
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public Object getPropagationId() {
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return propagationId;
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}
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}
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