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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: * DatasetRenderingOrder.java 29: * -------------------------- 30: * (C) Copyright 2003-2007, by Object Refinery Limited. 31: * 32: * Original Author: David Gilbert (for Object Refinery Limited); 33: * Contributor(s): -; 34: * 35: * Changes: 36: * -------- 37: * 02-May-2003 : Version 1 (DG); 38: * 02-Jun-2004 : Changed 'STANDARD' --> 'FORWARD' (DG); 39: * 40: */ 41: 42: package org.jfree.chart.plot; 43: 44: import java.io.ObjectStreamException; 45: import java.io.Serializable; 46: 47: /** 48: * Defines the tokens that indicate the rendering order for datasets in a 49: * {@link org.jfree.chart.plot.CategoryPlot} or an 50: * {@link org.jfree.chart.plot.XYPlot}. 51: */ 52: public final class DatasetRenderingOrder implements Serializable { 53: 54: /** For serialization. */ 55: private static final long serialVersionUID = -600593412366385072L; 56: 57: /** 58: * Render datasets in the order 0, 1, 2, ..., N-1, where N is the number 59: * of datasets. 60: */ 61: public static final DatasetRenderingOrder FORWARD 62: = new DatasetRenderingOrder("DatasetRenderingOrder.FORWARD"); 63: 64: /** 65: * Render datasets in the order N-1, N-2, ..., 2, 1, 0, where N is the 66: * number of datasets. 67: */ 68: public static final DatasetRenderingOrder REVERSE 69: = new DatasetRenderingOrder("DatasetRenderingOrder.REVERSE"); 70: 71: /** The name. */ 72: private String name; 73: 74: /** 75: * Private constructor. 76: * 77: * @param name the name. 78: */ 79: private DatasetRenderingOrder(String name) { 80: this.name = name; 81: } 82: 83: /** 84: * Returns a string representing the object. 85: * 86: * @return The string (never <code>null</code>). 87: */ 88: public String toString() { 89: return this.name; 90: } 91: 92: /** 93: * Returns <code>true</code> if this object is equal to the specified 94: * object, and <code>false</code> otherwise. 95: * 96: * @param o the other object. 97: * 98: * @return A boolean. 99: */ 100: public boolean equals(Object o) { 101: 102: if (this == o) { 103: return true; 104: } 105: if (!(o instanceof DatasetRenderingOrder)) { 106: return false; 107: } 108: 109: DatasetRenderingOrder order = (DatasetRenderingOrder) o; 110: if (!this.name.equals(order.toString())) { 111: return false; 112: } 113: 114: return true; 115: 116: } 117: 118: /** 119: * Ensures that serialization returns the unique instances. 120: * 121: * @return The object. 122: * 123: * @throws ObjectStreamException if there is a problem. 124: */ 125: private Object readResolve() throws ObjectStreamException { 126: if (this.equals(DatasetRenderingOrder.FORWARD)) { 127: return DatasetRenderingOrder.FORWARD; 128: } 129: else if (this.equals(DatasetRenderingOrder.REVERSE)) { 130: return DatasetRenderingOrder.REVERSE; 131: } 132: return null; 133: } 134: 135: }