001    /* ===========================================================
002     * JFreeChart : a free chart library for the Java(tm) platform
003     * ===========================================================
004     *
005     * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors.
006     *
007     * Project Info:  http://www.jfree.org/jfreechart/index.html
008     *
009     * This library is free software; you can redistribute it and/or modify it 
010     * under the terms of the GNU Lesser General Public License as published by 
011     * the Free Software Foundation; either version 2.1 of the License, or 
012     * (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but 
015     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
016     * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
017     * License for more details.
018     *
019     * You should have received a copy of the GNU Lesser General Public
020     * License along with this library; if not, write to the Free Software
021     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
022     * USA.  
023     *
024     * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
025     * in the United States and other countries.]
026     *
027     * ----------------------
028     * XIntervalDataItem.java
029     * ----------------------
030     * (C) Copyright 2006, 2007, by Object Refinery Limited.
031     *
032     * Original Author:  David Gilbert (for Object Refinery Limited);
033     * Contributor(s):   -;
034     *
035     * $Id: XIntervalDataItem.java,v 1.1.2.2 2007/02/02 11:01:09 mungady Exp $
036     *
037     * Changes
038     * -------
039     * 20-Oct-2006 : Version 1 (DG);
040     *
041     */
042    
043    package org.jfree.data.xy;
044    
045    import org.jfree.data.ComparableObjectItem;
046    
047    /**
048     * An item representing data in the form (x, x-low, x-high, y).
049     *
050     * @since 1.0.3
051     */
052    public class XIntervalDataItem extends ComparableObjectItem {
053    
054        /** 
055         * Creates a new instance of <code>XIntervalDataItem</code>.
056         *
057         * @param x  the x-value.
058         * @param xLow  the lower bound of the x-interval.
059         * @param xHigh  the upper bound of the x-interval.
060         * @param y  the y-value.
061         */
062        public XIntervalDataItem(double x, double xLow, double xHigh, double y) {
063            super(new Double(x), new YWithXInterval(y, xLow, xHigh));
064        }
065        
066        /**
067         * Returns the x-value.
068         *
069         * @return The x-value (never <code>null</code>).
070         */
071        public Number getX() {
072            return (Number) getComparable();
073        }
074        
075        /**
076         * Returns the y-value.
077         *
078         * @return The y-value.
079         */
080        public double getYValue() {
081            YWithXInterval interval = (YWithXInterval) getObject();
082            if (interval != null) {
083                return interval.getY();
084            }
085            else {
086                return Double.NaN;
087            }
088        }
089        
090        /**
091         * Returns the lower bound of the x-interval.
092         *
093         * @return The lower bound of the x-interval.
094         */
095        public double getXLowValue() {
096            YWithXInterval interval = (YWithXInterval) getObject();
097            if (interval != null) {
098                return interval.getXLow();
099            }
100            else {
101                return Double.NaN;
102            }
103        }
104        
105        /**
106         * Returns the upper bound of the x-interval.
107         *
108         * @return The upper bound of the x-interval.
109         */
110        public double getXHighValue() {
111            YWithXInterval interval = (YWithXInterval) getObject();
112            if (interval != null) {
113                return interval.getXHigh();
114            }
115            else {
116                return Double.NaN;
117            }
118        }
119        
120    }