001    /* ===========================================================
002     * JFreeChart : a free chart library for the Java(tm) platform
003     * ===========================================================
004     *
005     * (C) Copyright 2000-2005, 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     * TableXYDataset.java
029     * -------------------
030     * (C) Copyright 2000-2004, by Richard Atkinson and Contributors.
031     *
032     * Original Author:  Richard Atkinson;
033     * Contributor(s):   David Gilbert (for Object Refinery Limited);
034     *
035     * $Id: TableXYDataset.java,v 1.2.2.1 2005/10/25 21:36:51 mungady Exp $
036     *
037     * Changes
038     * -------
039     * 22-Sep-2003 : Changed to be an interface.  Previous functionality moved to 
040     *               DefaultTableXYDataset;
041     * 16-Feb-2004 : Updated Javadocs (DG);
042     * 
043     */
044    
045    package org.jfree.data.xy;
046    
047    
048    /**
049     * A dataset containing one or more data series containing (x, y) data items, 
050     * where all series in the dataset share the same set of x-values.  This is a 
051     * restricted form of the {@link XYDataset} interface (which allows independent
052     * x-values between series). This is used primarily by the 
053     * {@link org.jfree.chart.renderer.xy.StackedXYAreaRenderer}.
054     */
055    public interface TableXYDataset extends XYDataset {
056    
057        /**
058         * Returns the number of items every series.
059         *
060         * @return The item count.
061         */
062        public int getItemCount();
063    
064    }