001/* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2020, 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 2007-2020, by David Forslund and Contributors.
031 *
032 * Original Author:  David Forslund;
033 * Contributor(s):   David Gilbert (for Object Refinery Limited);
034 *
035 */
036
037package org.jfree.data.statistics;
038
039import java.util.List;
040
041import org.jfree.data.category.CategoryDataset;
042
043/**
044 * A category dataset that defines multiple values for each item.
045 *
046 * @since 1.0.7
047 */
048public interface MultiValueCategoryDataset extends CategoryDataset {
049
050    /**
051     * Returns a list (possibly empty) of the values for the specified item.
052     * The returned list should be unmodifiable.
053     *
054     * @param row  the row index (zero-based).
055     * @param column   the column index (zero-based).
056     *
057     * @return The list of values.
058     */
059    public List getValues(int row, int column);
060
061    /**
062     * Returns a list (possibly empty) of the values for the specified item.
063     * The returned list should be unmodifiable.
064     *
065     * @param rowKey  the row key ({@code null} not permitted).
066     * @param columnKey  the column key ({@code null} not permitted).
067     *
068     * @return The list of values.
069     */
070    public List getValues(Comparable rowKey, Comparable columnKey);
071
072}