# XIntervalDataItem.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.]
     *
     * ----------------------
     * XIntervalDataItem.java
     * ----------------------
     * (C) Copyright 2006, 2007, by Object Refinery Limited.
     *
     * Original Author:  David Gilbert (for Object Refinery Limited);
     * Contributor(s):   -;
     *
     * Changes
     * -------
     * 20-Oct-2006 : Version 1 (DG);
     *
     */

    package org.jfree.data.xy;

    import org.jfree.data.ComparableObjectItem;

    /**
     * An item representing data in the form (x, x-low, x-high, y).
     *
     * @since 1.0.3
     */
    public class XIntervalDataItem extends ComparableObjectItem {

        /**
         * Creates a new instance of <code>XIntervalDataItem</code>.
         *
         * @param x  the x-value.
         * @param xLow  the lower bound of the x-interval.
         * @param xHigh  the upper bound of the x-interval.
         * @param y  the y-value.
         */
        public XIntervalDataItem(double x, double xLow, double xHigh, double y) {
            super(new Double(x), new YWithXInterval(y, xLow, xHigh));
        }

        /**
         * Returns the x-value.
         *
         * @return The x-value (never <code>null</code>).
         */
        public Number getX() {
            return (Number) getComparable();
        }

        /**
         * Returns the y-value.
         *
         * @return The y-value.
         */
        public double getYValue() {
            YWithXInterval interval = (YWithXInterval) getObject();
            if (interval != null) {
                return interval.getY();
            }
            else {
                return Double.NaN;
            }
        }

        /**
         * Returns the lower bound of the x-interval.
         *
         * @return The lower bound of the x-interval.
         */
        public double getXLowValue() {
            YWithXInterval interval = (YWithXInterval) getObject();
            if (interval != null) {
                return interval.getXLow();
            }
            else {
                return Double.NaN;
            }
        }

        /**
         * Returns the upper bound of the x-interval.
         *
         * @return The upper bound of the x-interval.
         */
        public double getXHighValue() {
            YWithXInterval interval = (YWithXInterval) getObject();
            if (interval != null) {
                return interval.getXHigh();
            }
            else {
                return Double.NaN;
            }
        }

    }