001/* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2013, 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 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
025 * Other names may be trademarks of their respective owners.]
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
041package org.jfree.data.statistics;
042
043import java.util.List;
044
045import 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 */
052public 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}