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 * PieDataset.java
029 * ---------------
030 * (C) Copyright 2001-2008, by Object Refinery Limited.
031 *
032 * Original Author: David Gilbert (for Object Refinery Limited);
033 * Contributor(s): Sam (oldman);
034 *
035 * Changes
036 * -------
037 * 17-Nov-2001 : Version 1 (DG);
038 * 22-Jan-2002 : Removed the getCategoryCount() method, updated Javadoc
039 * comments (DG);
040 * 18-Apr-2002 : getCategories() now returns List instead of Set (oldman);
041 * 23-Oct-2002 : Reorganised the code: PieDataset now extends KeyedValues
042 * interface (DG);
043 * 04-Mar-2003 : Now just replicates the KeyedValuesDataset interface (DG);
044 *
045 */
046
047 package org.jfree.data.general;
048
049 import org.jfree.data.KeyedValues;
050
051 /**
052 * A general purpose dataset where values are associated with keys. As the
053 * name suggests, you can use this dataset to supply data for pie charts (refer
054 * to the {@link org.jfree.chart.plot.PiePlot} class).
055 */
056 public interface PieDataset extends KeyedValues, Dataset {
057
058 // no new methods added.
059
060 }