1 /* ====================================== 2 * JFreeChart : a free Java chart library 3 * ====================================== 4 * 5 * Project Info: http://www.jfree.org/jfreechart/index.html 6 * Project Lead: David Gilbert (david.gilbert@object-refinery.com); 7 * 8 * (C) Copyright 2000-2003, by Object Refinery Limited and Contributors. 9 * 10 * This library is free software; you can redistribute it and/or modify it under the terms 11 * of the GNU Lesser General Public License as published by the Free Software Foundation; 12 * either version 2.1 of the License, or (at your option) any later version. 13 * 14 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 15 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 16 * See the GNU Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public License along with this 19 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, 20 * Boston, MA 02111-1307, USA. 21 * 22 * ---------------------- 23 * IntervalXYDataset.java 24 * ---------------------- 25 * (C) Copyright 2001-2003, by Object Refinery Limited and Contributors. 26 * 27 * Original Author: Mark Watson (www.markwatson.com); 28 * Contributor(s): David Gilbert (for Object Refinery Limited); 29 * 30 * $Id: IntervalXYDataset.java,v 1.3 2003/07/10 07:16:45 mungady Exp $ 31 * 32 * Changes 33 * ------- 34 * 18-Oct-2001 : Version 1, thanks to Mark Watson (DG); 35 * 22-Oct-2001 : Renamed DataSource.java --> Dataset.java etc (DG); 36 * 37 */ 38 39 package org.jfree.data; 40 41 /** 42 * An extension of the {@link XYDataset} interface that allows a range of data to be 43 * defined for the X values, the Y values, or both the X and Y values. 44 * <P> 45 * This versatile interface will be used to support (among other things) bar 46 * plots against numerical axes. 47 * 48 * @author Mark Watson 49 */ 50 public interface IntervalXYDataset extends XYDataset { 51 52 /** 53 * Returns the starting X value for the specified series and item. 54 * 55 * @param series the series (zero-based index). 56 * @param item the item within a series (zero-based index). 57 * 58 * @return the starting X value for the specified series and item. 59 */ 60 public Number getStartXValue(int series, int item); 61 62 /** 63 * Returns the ending X value for the specified series and item. 64 * 65 * @param series the series (zero-based index). 66 * @param item the item within a series (zero-based index). 67 * 68 * @return the ending X value for the specified series and item. 69 */ 70 public Number getEndXValue(int series, int item); 71 72 /** 73 * Returns the starting Y value for the specified series and item. 74 * 75 * @param series the series (zero-based index). 76 * @param item the item within a series (zero-based index). 77 * 78 * @return starting Y value for the specified series and item. 79 */ 80 public Number getStartYValue(int series, int item); 81 82 /** 83 * Returns the ending Y value for the specified series and item. 84 * 85 * @param series the series (zero-based index). 86 * @param item the item within a series (zero-based index). 87 * 88 * @return the ending Y value for the specified series and item. 89 */ 90 public Number getEndYValue(int series, int item); 91 92 } 93