content: /*
   * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * 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.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  package java.beans;
  
  /**
   * An "IndexedPropertyChange" event gets delivered whenever a component that
   * conforms to the JavaBeans&trade; 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());
      }
  }
  