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 * WindDataset.java
029 * ----------------
030 * (C) Copyright 2001-2008, by Achilleus Mantzios and Contributors.
031 *
032 * Original Author: Achilleus Mantzios;
033 * Contributor(s): David Gilbert (for Object Refinery Limited);
034 *
035 * Changes
036 * -------
037 * 06-Feb-2002 : Version 1, based on code contributed by Achilleus
038 * Mantzios (DG);
039 *
040 */
041
042 package org.jfree.data.xy;
043
044 /**
045 * Interface for a dataset that supplies wind intensity and direction values
046 * observed at various points in time.
047 */
048 public interface WindDataset extends XYDataset {
049
050 /**
051 * Returns the wind direction (should be in the range 0 to 12,
052 * corresponding to the positions on an upside-down clock face).
053 *
054 * @param series the series (in the range <code>0</code> to
055 * <code>getSeriesCount() - 1</code>).
056 * @param item the item (in the range <code>0</code> to
057 * <code>getItemCount(series) - 1</code>).
058 *
059 * @return The wind direction.
060 */
061 public Number getWindDirection(int series, int item);
062
063 /**
064 * Returns the wind force on the Beaufort scale (0 to 12). See:
065 * <p>
066 * http://en.wikipedia.org/wiki/Beaufort_scale
067 *
068 * @param series the series (in the range <code>0</code> to
069 * <code>getSeriesCount() - 1</code>).
070 * @param item the item (in the range <code>0</code> to
071 * <code>getItemCount(series) - 1</code>).
072 *
073 * @return The wind force.
074 */
075 public Number getWindForce(int series, int item);
076
077 }