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
046 package org.jfree.data.category;
047
048
049 /**
050 * A category dataset that defines a value range for each series/category
051 * combination.
052 */
053 public 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 }