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1: /* =========================================================== 2: * JFreeChart : a free chart library for the Java(tm) platform 3: * =========================================================== 4: * 5: * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors. 6: * 7: * Project Info: http://www.jfree.org/jfreechart/index.html 8: * 9: * This library is free software; you can redistribute it and/or modify it 10: * under the terms of the GNU Lesser General Public License as published by 11: * the Free Software Foundation; either version 2.1 of the License, or 12: * (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but 15: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 17: * License for more details. 18: * 19: * You should have received a copy of the GNU Lesser General Public 20: * License along with this library; if not, write to the Free Software 21: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 22: * USA. 23: * 24: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 25: * in the United States and other countries.] 26: * 27: * ---------------------- 28: * IntervalXYDataset.java 29: * ---------------------- 30: * (C) Copyright 2001-2007, by Object Refinery Limited and Contributors. 31: * 32: * Original Author: Mark Watson (www.markwatson.com); 33: * Contributor(s): David Gilbert (for Object Refinery Limited); 34: * 35: * Changes 36: * ------- 37: * 18-Oct-2001 : Version 1, thanks to Mark Watson (DG); 38: * 22-Oct-2001 : Renamed DataSource.java --> Dataset.java etc (DG); 39: * 06-May-2004 : Added methods that return double primitives (DG); 40: * 41: */ 42: 43: package org.jfree.data.xy; 44: 45: 46: /** 47: * An extension of the {@link XYDataset} interface that allows a range of data 48: * to be defined for the X values, the Y values, or both the X and Y values. 49: * This interface is used to support (among other things) bar plots against 50: * numerical axes. 51: */ 52: public interface IntervalXYDataset extends XYDataset { 53: 54: /** 55: * Returns the starting X value for the specified series and item. 56: * 57: * @param series the series index (zero-based). 58: * @param item the item index (zero-based). 59: * 60: * @return The value. 61: */ 62: public Number getStartX(int series, int item); 63: 64: /** 65: * Returns the start x-value (as a double primitive) for an item within a 66: * series. 67: * 68: * @param series the series (zero-based index). 69: * @param item the item (zero-based index). 70: * 71: * @return The start x-value. 72: */ 73: public double getStartXValue(int series, int item); 74: 75: /** 76: * Returns the ending X value for the specified series and item. 77: * 78: * @param series the series index (zero-based). 79: * @param item the item index (zero-based). 80: * 81: * @return The value. 82: */ 83: public Number getEndX(int series, int item); 84: 85: /** 86: * Returns the end x-value (as a double primitive) for an item within a 87: * series. 88: * 89: * @param series the series index (zero-based). 90: * @param item the item index (zero-based). 91: * 92: * @return The end x-value. 93: */ 94: public double getEndXValue(int series, int item); 95: 96: /** 97: * Returns the starting Y value for the specified series and item. 98: * 99: * @param series the series index (zero-based). 100: * @param item the item index (zero-based). 101: * 102: * @return The value. 103: */ 104: public Number getStartY(int series, int item); 105: 106: /** 107: * Returns the start y-value (as a double primitive) for an item within a 108: * series. 109: * 110: * @param series the series index (zero-based). 111: * @param item the item index (zero-based). 112: * 113: * @return The start y-value. 114: */ 115: public double getStartYValue(int series, int item); 116: 117: /** 118: * Returns the ending Y value for the specified series and item. 119: * 120: * @param series the series index (zero-based). 121: * @param item the item index (zero-based). 122: * 123: * @return The value. 124: */ 125: public Number getEndY(int series, int item); 126: 127: /** 128: * Returns the end y-value (as a double primitive) for an item within a 129: * series. 130: * 131: * @param series the series index (zero-based). 132: * @param item the item index (zero-based). 133: * 134: * @return The end y-value. 135: */ 136: public double getEndYValue(int series, int item); 137: 138: }