001 /* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2008, 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 2002-2008, 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
041 package org.jfree.data;
042
043 /**
044 * A general purpose interface that can be used to access a table of values.
045 */
046 public 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 }