001/* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2013, 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 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
025 * Other names may be trademarks of their respective owners.]
026 *
027 * -------------
028 * Values2D.java
029 * -------------
030 * (C) Copyright 2002-2008, by Object Refinery Limited.
031 *
032 * Original Author:  David Gilbert (for Object Refinery Limited);
033 * Contributor(s):   -;
034 *
035 * Changes:
036 * --------
037 * 28-Oct-2002 : Version 1 (DG);
038 *
039 */
040
041package org.jfree.data;
042
043/**
044 * A general purpose interface that can be used to access a table of values.
045 */
046public interface Values2D {
047
048    /**
049     * Returns the number of rows in the table.
050     *
051     * @return The row count.
052     */
053    public int getRowCount();
054
055    /**
056     * Returns the number of columns in the table.
057     *
058     * @return The column count.
059     */
060    public int getColumnCount();
061
062    /**
063     * Returns a value from the table.
064     *
065     * @param row  the row index (zero-based).
066     * @param column  the column index (zero-based).
067     *
068     * @return The value (possibly <code>null</code>).
069     *
070     * @throws IndexOutOfBoundsException if the <code>row</code>
071     *         or <code>column</code> is out of bounds.
072     */
073    public Number getValue(int row, int column);
074
075}