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jfreechart example source code file (PlotUtilities.java)

This example jfreechart source code file (PlotUtilities.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

plotutilities, plotutilities, xydataset, xydataset

The jfreechart PlotUtilities.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.]
 *
 * ------------------
 * PlotUtilities.java
 * ------------------
 * (C) Copyright 2007, 2008, by Sergei Ivanov and Contributors.
 *
 * Original Author:  Sergei Ivanov;
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * Changes
 * -------
 * 26-Sep-2007 : Version 1, contributed by Sergei Ivanov (see patch
 *               1772932) (DG);
 *
 */

package org.jfree.chart.plot;

import org.jfree.data.general.DatasetUtilities;
import org.jfree.data.xy.XYDataset;

/**
 * Some utility methods related to the plot classes.
 *
 * @since 1.0.7
 */
public class PlotUtilities {

    /**
     * Returns <code>true if all the datasets belonging to the specified
     * plot are empty or <code>null, and false otherwise.
     *
     * @param plot  the plot (<code>null permitted).
     *
     * @return A boolean.
     *
     * @since 1.0.7
     */
    public static boolean isEmptyOrNull(XYPlot plot) {
        if (plot != null) {
            for (int i = 0, n = plot.getDatasetCount(); i < n; i++) {
                final XYDataset dataset = plot.getDataset(i);
                if (!DatasetUtilities.isEmptyOrNull(dataset)) {
                    return false;
                }
            }
        }
        return true;
    }

}

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