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 }