/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2007, 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, 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</code> if all the datasets belonging to the specified
* plot are empty or <code>null</code>, and <code>false</code> otherwise.
*
* @param plot the plot (<code>null</code> 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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