/* ===========================================================

 * JFreeChart : a free chart library for the Java(tm) platform

 * ===========================================================

 *

 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.

 *

 * Project Info:  http://www.jfree.org/jfreechart/index.html

 *

 * This library is free software; you can redistribute it and/or modify it under the terms

 * of the GNU Lesser General Public License as published by the Free Software Foundation;

 * either version 2.1 of the License, or (at your option) any later version.

 *

 * This library 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 Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License along with this

 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,

 * Boston, MA 02111-1307, USA.

 *

 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 

 * in the United States and other countries.]

 *

 * -----------------------

 * DatasetChangeEvent.java

 * -----------------------

 * (C) Copyright 2000-2004, by Object Refinery Limited.

 *

 * Original Author:  David Gilbert (for Object Refinery Limited);

 * Contributor(s):   -;

 *

 * $Id: DatasetChangeEvent.java,v 1.1 2004/08/31 15:27:03 mungady Exp $

 *

 * Changes (from 24-Aug-2001)

 * --------------------------

 * 24-Aug-2001 : Added standard source header. Fixed DOS encoding problem (DG);

 * 15-Oct-2001 : Move to new package (com.jrefinery.data.*) (DG);

 * 22-Oct-2001 : Renamed DataSource.java --> Dataset.java etc. (DG);

 * 11-Jun-2002 : Separated the event source from the dataset to cover the case where the dataset

 *               is changed to null in the Plot class.  Updated Javadocs (DG);

 * 04-Oct-2002 : Fixed errors reported by Checkstyle (DG);

 *

 */



package org.jfree.data.general;



/**

 * A change event that encapsulates information about a change to a dataset.

 *

 */

public class DatasetChangeEvent extends java.util.EventObject {



    /**

     * The dataset that generated the change event.

     */

    private Dataset data;



    /**

     * Constructs a new event.

     * <P>

     * The source is either the dataset or the Plot class.  The dataset can be

     * null (in this case the source will be the Plot class).

     *

     * @param source  the source of the event.

     * @param data  the dataset that generated the event.

     */

    public DatasetChangeEvent(final Object source, final Dataset data) {

        super(source);

        this.data = data;

    }



    /**

     * Returns the dataset that generated the event.

     *

     * @return the dataset.

     */

    public Dataset getDataset() {

        return this.data;

    }



}

