ajava.beans.IndexedPropertyChangeEvent Maven / Gradle / Ivy
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/*
* Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle 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.
*
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*/
package ajava.beans;
/**
* An "IndexedPropertyChange" event gets delivered whenever a component that
* conforms to the JavaBeans™ specification (a "bean") changes a bound
* indexed property. This class is an extension of PropertyChangeEvent
* but contains the index of the property that has changed.
*
* Null values may be provided for the old and the new values if their
* true values are not known.
*
* 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.
*
* @since 1.5
* @author Mark Davidson
*/
public class IndexedPropertyChangeEvent extends PropertyChangeEvent {
private static final long serialVersionUID = -320227448495806870L;
private int index;
/**
* Constructs a new IndexedPropertyChangeEvent object.
*
* @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.
* @param index index of the property element that was changed.
*/
public IndexedPropertyChangeEvent(Object source, String propertyName,
Object oldValue, Object newValue,
int index) {
super (source, propertyName, oldValue, newValue);
this.index = index;
}
/**
* Gets the index of the property that was changed.
*
* @return The index specifying the property element that was
* changed.
*/
public int getIndex() {
return index;
}
void appendTo(StringBuilder sb) {
sb.append("; index=").append(getIndex());
}
}