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