    001/* ===========================================================
    002 * JFreeChart : a free chart library for the Java(tm) platform
    003 * ===========================================================
    004 *
    005 * (C) Copyright 2000-2011, 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 * StatisticalCategoryDataset.java
    029 * -------------------------------
    030 * (C) Copyright 2002-2009, by Pascal Collet and Contributors.
    031 *
    032 * Original Author:  Pascal Collet;
    033 * Contributor(s):   David Gilbert (for Object Refinery Limited);
    034 *
    035 * Changes
    036 * -------
    037 * 21-Aug-2002 : Version 1, contributed by Pascal Collet (DG);
    038 * 07-Oct-2002 : Fixed errors reported by Checkstyle (DG);
    039 * 24-Oct-2002 : Amendments in line with changes to the CategoryDataset
    040 *               interface (DG);
    041 * ------------- JFREECHART 1.0.x ---------------------------------------------
    042 * 02-Feb-2007 : Removed author tags from all over JFreeChart sources (DG);
    043 *
    044 */
    045
    046package org.jfree.data.statistics;
    047
    048import org.jfree.data.category.CategoryDataset;
    049
    050/**
    051 * A category dataset that defines a mean and standard deviation value for
    052 * each item.
    053 */
    054public interface StatisticalCategoryDataset extends CategoryDataset {
    055
    056    /**
    057     * Returns the mean value for an item.
    058     *
    059     * @param row  the row index (zero-based).
    060     * @param column  the column index (zero-based).
    061     *
    062     * @return The mean value (possibly <code>null</code>).
    063     */
    064    public Number getMeanValue(int row, int column);
    065
    066    /**
    067     * Returns the mean value for an item.
    068     *
    069     * @param rowKey  the row key.
    070     * @param columnKey  the columnKey.
    071     *
    072     * @return The mean value (possibly <code>null</code>).
    073     */
    074    public Number getMeanValue(Comparable rowKey, Comparable columnKey);
    075
    076    /**
    077     * Returns the standard deviation value for an item.
    078     *
    079     * @param row  the row index (zero-based).
    080     * @param column  the column index (zero-based).
    081     *
    082     * @return The standard deviation (possibly <code>null</code>).
    083     */
    084    public Number getStdDevValue(int row, int column);
    085
    086    /**
    087     * Returns the standard deviation value for an item.
    088     *
    089     * @param rowKey  the row key.
    090     * @param columnKey  the columnKey.
    091     *
    092     * @return The standard deviation (possibly <code>null</code>).
    093     */
    094    public Number getStdDevValue(Comparable rowKey, Comparable columnKey);
    095
    096}
    097