001    /* ===========================================================
002     * JFreeChart : a free chart library for the Java(tm) platform
003     * ===========================================================
004     *
005     * (C) Copyright 2000-2007, 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 2000-2007, by Richard Atkinson and Contributors.
031     *
032     * Original Author:  Richard Atkinson;
033     * Contributor(s):   David Gilbert (for Object Refinery Limited);
034     *
035     * Changes
036     * -------
037     * 22-Sep-2003 : Changed to be an interface.  Previous functionality moved to 
038     *               DefaultTableXYDataset;
039     * 16-Feb-2004 : Updated Javadocs (DG);
040     * 
041     */
042    
043    package org.jfree.data.xy;
044    
045    
046    /**
047     * A dataset containing one or more data series containing (x, y) data items, 
048     * where all series in the dataset share the same set of x-values.  This is a 
049     * restricted form of the {@link XYDataset} interface (which allows independent
050     * x-values between series). This is used primarily by the 
051     * {@link org.jfree.chart.renderer.xy.StackedXYAreaRenderer}.
052     */
053    public interface TableXYDataset extends XYDataset {
054    
055        /**
056         * Returns the number of items every series.
057         *
058         * @return The item count.
059         */
060        public int getItemCount();
061    
062    }