/*
 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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package java.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 <code>PropertyChangeEvent</code>
 * but contains the index of the property that has changed.
 * <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.
 *
 * @since 1.5
 * @author Mark Davidson
 */
public class IndexedPropertyChangeEvent extends PropertyChangeEvent {
 private static final long serialVersionUID = -320227448495806870L;

 private int index;

 /**
 * Constructs a new <code>IndexedPropertyChangeEvent</code> 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());
 }
}