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     * CategoryDataset.java
029     * --------------------
030     * (C) Copyright 2000-2008, by Object Refinery Limited.
031     *
032     * Original Author:  David Gilbert (for Object Refinery Limited);
033     * Contributor(s):   -;
034     *
035     * Changes (from 21-Aug-2001)
036     * --------------------------
037     * 21-Aug-2001 : Added standard header. Fixed DOS encoding problem (DG);
038     * 18-Sep-2001 : Updated e-mail address in header (DG);
039     * 15-Oct-2001 : Moved to new package (com.jrefinery.data.*) (DG);
040     * 22-Oct-2001 : Renamed DataSource.java --> Dataset.java etc. (DG);
041     * 17-Nov-2001 : Updated Javadoc comments (DG);
042     * 04-Mar-2002 : Updated import statement (DG);
043     * 23-Oct-2002 : Reorganised code (DG);
044     * 10-Jan-2003 : Updated Javadocs (DG);
045     * 21-Jan-2003 : Merged with TableDataset (which only existed in CVS) (DG);
046     * 13-Mar-2003 : Added KeyedValues2DDataset interface (DG);
047     * 23-Apr-2003 : Switched CategoryDataset and KeyedValues2DDataset so that
048     *               CategoryDataset is the super interface (DG);
049     * 18-Aug-2004 : Moved from org.jfree.data --> org.jfree.data.category (DG);
050     *
051     */
052    
053    package org.jfree.data.category;
054    
055    import org.jfree.data.KeyedValues2D;
056    import org.jfree.data.general.Dataset;
057    
058    /**
059     * The interface for a dataset with one or more series, and values associated
060     * with categories.
061     * <P>
062     * The categories are represented by <code>Comparable</code> instance, with the
063     * category label being provided by the <code>toString</code> method.
064     */
065    public interface CategoryDataset extends KeyedValues2D, Dataset {
066    
067        // no additional methods required
068    
069    }