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 * IntervalCategoryDataset.java
029 * ----------------------------
030 * (C) Copyright 2002-2007, by Eduard Martinescu and Contributors.
031 *
032 * Original Author:  Eduard Martinescu;
033 * Contributor(s):   David Gilbert (for Object Refinery Limited);
034 *
035 * Changes
036 * -------
037 * 19-Mar-2002 : Version 1 contributed by Eduard Martinescu.  The interface 
038 *               name and method names have been renamed to be consistent with 
039 *               existing interfaces (DG);
040 * 06-Jun-2002 : Updated Javadoc comments (DG);
041 * 24-Oct-2002 : Categories and series are now indexed by int or Comparable, 
042 *               following changes made to the CategoryDataset interface (DG);
043 *
044 */
045
046package org.jfree.data.category;
047
048
049/**
050 * A category dataset that defines a value range for each series/category 
051 * combination.
052 */
053public interface IntervalCategoryDataset extends CategoryDataset {
054
055    /**
056     * Returns the start value for the interval for a given series and category.
057     *
058     * @param series  the series (zero-based index).
059     * @param category  the category (zero-based index).
060     *
061     * @return The start value (possibly <code>null</code>).
062     */
063    public Number getStartValue(int series, int category);
064
065    /**
066     * Returns the start value for the interval for a given series and category.
067     *
068     * @param series  the series key.
069     * @param category  the category key.
070     *
071     * @return The start value (possibly <code>null</code>).
072     */
073    public Number getStartValue(Comparable series, Comparable category);
074
075    /**
076     * Returns the end value for the interval for a given series and category.
077     *
078     * @param series  the series (zero-based index).
079     * @param category  the category (zero-based index).
080     *
081     * @return The end value (possibly <code>null</code>).
082     */
083    public Number getEndValue(int series, int category);
084
085    /**
086     * Returns the end value for the interval for a given series and category.
087     *
088     * @param series  the series key.
089     * @param category  the category key.
090     *
091     * @return The end value (possibly <code>null</code>).
092     */
093    public Number getEndValue(Comparable series, Comparable category);
094
095}