001/* java.beans.beancontext.BeanContextEvent 002 Copyright (C) 1999 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038 039package java.beans.beancontext; 040 041import java.util.EventObject; 042 043/** 044 * Generic superclass for events fired by <code>BeanContext</code>s. 045 * 046 * @author John Keiser 047 * @since 1.2 048 */ 049 050public abstract class BeanContextEvent extends EventObject 051{ 052 private static final long serialVersionUID = 7267998073569045052L; 053 054 /** 055 * The <code>BeanContext</code> that most recently passed this 056 * event on. 057 */ 058 protected BeanContext propagatedFrom; 059 060 /** 061 * Create a new event, from the specified <code>BeanContext</code>. 062 * <code>propagatedFrom</code> will be initialized to 063 * <code>null</code>. 064 * 065 * @param source the source of the event. 066 */ 067 protected BeanContextEvent(BeanContext source) 068 { 069 super(source); 070 } 071 072 /** 073 * Get the <code>BeanContext</code> that originated this event. 074 * @return the originator of this event. 075 */ 076 public BeanContext getBeanContext() 077 { 078 return (BeanContext)getSource(); 079 } 080 081 /** 082 * Get the most recent propagator of this event. 083 * If this value is <code>null</code>, you have received the event 084 * straight from the source. 085 * 086 * @return the most recent propagator of this event. 087 */ 088 public BeanContext getPropagatedFrom() 089 { 090 return propagatedFrom; 091 } 092 093 /** 094 * Tell whether this event has been propagated. 095 * @return <code>true</code> iff <code>getPropagatedFrom() != null</code>. 096 */ 097 public boolean isPropagated() 098 { 099 return propagatedFrom != null; 100 } 101 102 /** 103 * Set the most recent propagator of this event. 104 * @param propagator the most recent propagator of this event. 105 */ 106 public void setPropagatedFrom(BeanContext propagator) 107 { 108 propagatedFrom = propagator; 109 } 110}