001 /* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2008, 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 * MultiValueCategoryDataset.java
029 * ------------------------------
030 * (C) Copyright 2007, 2008, by David Forslund and Contributors.
031 *
032 * Original Author: David Forslund;
033 * Contributor(s): David Gilbert (for Object Refinery Limited);
034 *
035 * Changes
036 * -------
037 * 08-Oct-2007 : Version 1, see patch 1780779 (DG);
038 *
039 */
040
041 package org.jfree.data.statistics;
042
043 import java.util.List;
044
045 import org.jfree.data.category.CategoryDataset;
046
047 /**
048 * A category dataset that defines multiple values for each item.
049 *
050 * @since 1.0.7
051 */
052 public interface MultiValueCategoryDataset extends CategoryDataset {
053
054 /**
055 * Returns a list (possibly empty) of the values for the specified item.
056 * The returned list should be unmodifiable.
057 *
058 * @param row the row index (zero-based).
059 * @param column the column index (zero-based).
060 *
061 * @return The list of values.
062 */
063 public List getValues(int row, int column);
064
065 /**
066 * Returns a list (possibly empty) of the values for the specified item.
067 * The returned list should be unmodifiable.
068 *
069 * @param rowKey the row key (<code>null</code> not permitted).
070 * @param columnKey the column key (<code>null</code> not permitted).
071 *
072 * @return The list of values.
073 */
074 public List getValues(Comparable rowKey, Comparable columnKey);
075
076 }