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     * Values2D.java
029     * -------------
030     * (C) Copyright 2002-2005, by Object Refinery Limited.
031     *
032     * Original Author:  David Gilbert (for Object Refinery Limited);
033     * Contributor(s):   -;
034     *
035     * $Id: Values2D.java,v 1.3.2.1 2005/10/25 21:29:13 mungady Exp $
036     *
037     * Changes:
038     * --------
039     * 28-Oct-2002 : Version 1 (DG);
040     *
041     */
042    
043    package org.jfree.data;
044    
045    /**
046     * A general purpose interface that can be used to access a table of values.
047     */
048    public interface Values2D {
049    
050        /**
051         * Returns the number of rows in the table.
052         *
053         * @return The row count.
054         */
055        public int getRowCount();
056    
057        /**
058         * Returns the number of columns in the table.
059         *
060         * @return The column count.
061         */
062        public int getColumnCount();
063    
064        /**
065         * Returns a value from the table.
066         *
067         * @param row  the row index (zero-based).
068         * @param column  the column index (zero-based).
069         *
070         * @return The value (possibly <code>null</code>).
071         * 
072         * @throws IndexOutOfBoundsException if the <code>row</code> 
073         *         or <code>column</code> is out of bounds.
074         */
075        public Number getValue(int row, int column);
076    
077    }