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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: * AbstractXYDataset.java 29: * ---------------------- 30: * (C) Copyright 2004-2007, by Object Refinery Limited. 31: * 32: * Original Author: David Gilbert (for Object Refinery Limited). 33: * Contributor(s): -; 34: * 35: * Changes 36: * ------- 37: * 05-May-2004 : Version 1 (DG); 38: * 15-Jul-2004 : Switched getX() with getXValue() and getY() with 39: * getYValue() (DG); 40: * 18-Aug-2004 : Moved from org.jfree.data --> org.jfree.data.xy (DG); 41: * 42: */ 43: 44: package org.jfree.data.xy; 45: 46: import org.jfree.data.DomainOrder; 47: import org.jfree.data.general.AbstractSeriesDataset; 48: 49: /** 50: * An base class that you can use to create new implementations of the 51: * {@link XYDataset} interface. 52: */ 53: public abstract class AbstractXYDataset extends AbstractSeriesDataset 54: implements XYDataset { 55: 56: /** 57: * Returns the order of the domain (X) values. 58: * 59: * @return The domain order. 60: */ 61: public DomainOrder getDomainOrder() { 62: return DomainOrder.NONE; 63: } 64: 65: /** 66: * Returns the x-value (as a double primitive) for an item within a series. 67: * 68: * @param series the series index (zero-based). 69: * @param item the item index (zero-based). 70: * 71: * @return The value. 72: */ 73: public double getXValue(int series, int item) { 74: double result = Double.NaN; 75: Number x = getX(series, item); 76: if (x != null) { 77: result = x.doubleValue(); 78: } 79: return result; 80: } 81: 82: /** 83: * Returns the y-value (as a double primitive) for an item within a series. 84: * 85: * @param series the series index (zero-based). 86: * @param item the item index (zero-based). 87: * 88: * @return The value. 89: */ 90: public double getYValue(int series, int item) { 91: double result = Double.NaN; 92: Number y = getY(series, item); 93: if (y != null) { 94: result = y.doubleValue(); 95: } 96: return result; 97: } 98: 99: }