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jfreechart example source code file (VectorXYDataset.java)

This example jfreechart source code file (VectorXYDataset.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

vector, vector, vectorxydataset, vectorxydataset, xydataset, xydataset

The jfreechart VectorXYDataset.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.]
 *
 * --------------------
 * VectorXYDataset.java
 * --------------------
 * (C) Copyright 2007, 2008, by Object Refinery Limited and Contributors.
 *
 * Original Author:  David Gilbert (for Object Refinery Limited);
 * Contributor(s):   -;
 *
 * Changes
 * -------
 * 30-Jan-2007 : Version 1 (DG);
 * 24-May-2007 : Renamed getDeltaXValue() as getVectorXValue(), and likewise
 *               for getDeltaYValue(), and replaced getDeltaX()/getDeltaY()
 *               with getVector() (DG);
 * 25-May-2007 : Moved from experimental to the main source tree (DG);
 *
 */

package org.jfree.data.xy;

/**
 * An extension of the {@link XYDataset} interface that allows a vector to be
 * defined at a specific (x, y) location.
 *
 * @since 1.0.6
 */
public interface VectorXYDataset extends XYDataset {

    /**
     * Returns the x-component of the vector for an item in a series.
     *
     * @param series  the series index.
     * @param item  the item index.
     *
     * @return The x-component of the vector.
     */
    public double getVectorXValue(int series, int item);

    /**
     * Returns the y-component of the vector for an item in a series.
     *
     * @param series  the series index.
     * @param item  the item index.
     *
     * @return The y-component of the vector.
     */
    public double getVectorYValue(int series, int item);

    /**
     * Returns the vector for an item in a series.  Depending on the particular
     * dataset implementation, this may involve creating a new {@link Vector}
     * instance --- if you are just interested in the x and y components,
     * use the {@link #getVectorXValue(int, int)} and
     * {@link #getVectorYValue(int, int)} methods instead.
     *
     * @param series  the series index.
     * @param item  the item index.
     *
     * @return The vector (possibly <code>null).
     */
    public Vector getVector(int series, int item);

}

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