# ContourPlotUtilities.java

    /* ===========================================================
     * 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.]
     *
     * -------------------------
     * ContourPlotUtilities.java
     * -------------------------
     * (C) Copyright 2002-2007, by David M. O'Donnell and Contributors.
     *
     * Original Author:  David M. O'Donnell;
     * Contributor(s):   David Gilbert (for Object Refinery Limited);
     *
     * Changes
     * -------
     * 26-Nov-2002 : Version 1 contributed by David M. O'Donnell (DG);
     * 22-Jul-2003 : Made this class abstract as there is no need to instantiate
     *               it (DG);
     * ------------- JFREECHART 1.0.x ---------------------------------------------
     * 31-Jan-2007 : Deprecated (DG);
     *
     */

    package org.jfree.chart.plot;

    import org.jfree.chart.renderer.xy.XYBlockRenderer;
    import org.jfree.data.Range;
    import org.jfree.data.contour.ContourDataset;
    import org.jfree.data.contour.DefaultContourDataset;

    /**
     * Some utility methods for the {@link ContourPlot} class.
     *
     * @deprecated This class is no longer supported (as of version 1.0.4).  If
     *     you are creating contour plots, please try to use {@link XYPlot} and
     *     {@link XYBlockRenderer}.
     */
    public abstract class ContourPlotUtilities {

        /**
         * Returns the visible z-range.
         *
         * @param data  the dataset.
         * @param x  the x range.
         * @param y  the y range.
         *
         * @return The range.
         */
        public static Range visibleRange(ContourDataset data, Range x, Range y) {
            Range range = null;
            range = ((DefaultContourDataset) data).getZValueRange(x, y);
            return range;
        }

    }