/* ===========================================================

 * JFreeChart : a free chart library for the Java(tm) platform

 * ===========================================================

 *

 * (C) Copyright 2000-2004, 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., 59 Temple Place, Suite 330,

 * Boston, MA 02111-1307, USA.

 *

 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 

 * in the United States and other countries.]

 *

 * ----------------------------

 * IntervalCategoryDataset.java

 * ----------------------------

 * (C) Copyright 2002-2004, by Eduard Martinescu and Contributors.

 *

 * Original Author:  Eduard Martinescu;

 * Contributor(s):   David Gilbert (for Object Refinery Limited);

 *

 * $Id: IntervalCategoryDataset.java,v 1.1 2004/08/31 15:23:11 mungady Exp $

 *

 * Changes

 * -------

 * 19-Mar-2002 : Version 1 contributed by Eduard Martinescu.  The interface name and method names

 *               have been renamed to be consistent with existing interfaces (DG);

 * 06-Jun-2002 : Updated Javadoc comments (DG);

 * 24-Oct-2002 : Categories and series are now indexed by int or Comparable, following changes

 *               made to the CategoryDataset interface (DG);

 *

 */



package org.jfree.data.category;





/**

 * A category dataset that defines a value range for each series/category combination.

 *

 * @author Eduard Martinescu

 */

public interface IntervalCategoryDataset extends CategoryDataset {



    /**

     * Returns the start value for the interval for a given series and category.

     *

     * @param series  the series (zero-based index).

     * @param category  the category (zero-based index).

     *

     * @return The start value (possibly <code>null</code>).

     */

    public Number getStartValue(int series, int category);



    /**

     * Returns the start value for the interval for a given series and category.

     *

     * @param series  the series key.

     * @param category  the category key.

     *

     * @return The start value (possibly <code>null</code>).

     */

    public Number getStartValue(Comparable series, Comparable category);



    /**

     * Returns the end value for the interval for a given series and category.

     *

     * @param series  the series (zero-based index).

     * @param category  the category (zero-based index).

     *

     * @return The end value (possibly <code>null</code>).

     */

    public Number getEndValue(int series, int category);



    /**

     * Returns the end value for the interval for a given series and category.

     *

     * @param series  the series key.

     * @param category  the category key.

     *

     * @return The end value (possibly <code>null</code>).

     */

    public Number getEndValue(Comparable series, Comparable category);



}

