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jfreechart example source code file (Dataset.java)

This example jfreechart source code file (Dataset.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jfreechart tags/keywords

dataset, dataset, datasetgroup, datasetgroup

The jfreechart Dataset.java source code

/* ===========================================================
 * JFreeChart : a free chart library for the Java(tm) platform
 * ===========================================================
 *
 * (C) Copyright 2000-2008, 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
 * in the United States and other countries.]
 *
 * ------------
 * Dataset.java
 * ------------
 * (C) Copyright 2000-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes (from 18-Sep-2001)
 * --------------------------
 * 18-Sep-2001 : Added standard header and fixed DOS encoding problem (DG);
 * 15-Oct-2001 : Moved to a new package (com.jrefinery.data.*) (DG);
 * 22-Oct-2001 : Changed name to Dataset.java (DG);
 * 17-Nov-2001 : Added getLegendItemCount() and getLegendItemLabels() methods,
 *               created SeriesDataset interface and transferred series related
 *               methods out (DG);
 * 22-Jan-2002 : Reconsidered (and removed) the getLegendItemCount() and
 *               getLegendItemLabels() methods...leave this to client code (DG);
 * 27-Sep-2002 : Added get/setDatasetGroup() methods (DG);
 * 10-Jan-2003 : Updated Javadocs (DG);
 *
 */

package org.jfree.data.general;

/**
 * The base interface for data sets.
 * <P>
 * All datasets are required to support the {@link DatasetChangeEvent}
 * mechanism by allowing listeners to register and receive notification of any
 * changes to the dataset.
 * <P>
 * In addition, all datasets must belong to one (and only one)
 * {@link DatasetGroup}.  The group object maintains a reader-writer lock
 * which provides synchronised access to the datasets in multi-threaded code.
 */
public interface Dataset {

    /**
     * Registers an object for notification of changes to the dataset.
     *
     * @param listener  the object to register.
     */
    public void addChangeListener(DatasetChangeListener listener);

    /**
     * Deregisters an object for notification of changes to the dataset.
     *
     * @param listener  the object to deregister.
     */
    public void removeChangeListener(DatasetChangeListener listener);

    /**
     * Returns the dataset group.
     *
     * @return The dataset group.
     */
    public DatasetGroup getGroup();

    /**
     * Sets the dataset group.
     *
     * @param group  the dataset group.
     */
    public void setGroup(DatasetGroup group);

}

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