jfreechart example source code file (AbstractXYDataset.java)

This example jfreechart source code file (AbstractXYDataset.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

abstractseriesdataset, abstractxydataset, abstractxydataset, domainorder, domainorder, number, number, xydataset, xydataset

The jfreechart AbstractXYDataset.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.]
 *
 * ----------------------
 * AbstractXYDataset.java
 * ----------------------
 * (C) Copyright 2004-2008, by Object Refinery Limited.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited).
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 05-May-2004 : Version 1 (DG);
 * 15-Jul-2004 : Switched getX() with getXValue() and getY() with
 *               getYValue() (DG);
 * 18-Aug-2004 : Moved from org.jfree.data --> org.jfree.data.xy (DG);
 *
 */

package org.jfree.data.xy;

import org.jfree.data.DomainOrder;
import org.jfree.data.general.AbstractSeriesDataset;

/**
 * An base class that you can use to create new implementations of the
 * {@link XYDataset} interface.
 */
public abstract class AbstractXYDataset extends AbstractSeriesDataset
        implements XYDataset {

    /**
     * Returns the order of the domain (X) values.
     *
     * @return The domain order.
     */
    public DomainOrder getDomainOrder() {
        return DomainOrder.NONE;
    }

    /**
     * Returns the x-value (as a double primitive) for an item within a series.
     *
     * @param series  the series index (zero-based).
     * @param item  the item index (zero-based).
     *
     * @return The value.
     */
    public double getXValue(int series, int item) {
        double result = Double.NaN;
        Number x = getX(series, item);
        if (x != null) {
            result = x.doubleValue();
        }
        return result;
    }

    /**
     * Returns the y-value (as a double primitive) for an item within a series.
     *
     * @param series  the series index (zero-based).
     * @param item  the item index (zero-based).
     *
     * @return The value.
     */
    public double getYValue(int series, int item) {
        double result = Double.NaN;
        Number y = getY(series, item);
        if (y != null) {
            result = y.doubleValue();
        }
        return result;
    }

}