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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: * DialShape.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: * 20-Aug-2003 : Version 1 (DG); 38: * 12-Nov-2007 : Implemented hashCode() (DG); 39: * 40: */ 41: 42: package org.jfree.chart.plot; 43: 44: import java.io.ObjectStreamException; 45: import java.io.Serializable; 46: 47: /** 48: * Used to indicate the background shape for a 49: * {@link org.jfree.chart.plot.MeterPlot}. 50: */ 51: public final class DialShape implements Serializable { 52: 53: /** For serialization. */ 54: private static final long serialVersionUID = -3471933055190251131L; 55: 56: /** Circle. */ 57: public static final DialShape CIRCLE = new DialShape("DialShape.CIRCLE"); 58: 59: /** Chord. */ 60: public static final DialShape CHORD = new DialShape("DialShape.CHORD"); 61: 62: /** Pie. */ 63: public static final DialShape PIE = new DialShape("DialShape.PIE"); 64: 65: /** The name. */ 66: private String name; 67: 68: /** 69: * Private constructor. 70: * 71: * @param name the name. 72: */ 73: private DialShape(String name) { 74: this.name = name; 75: } 76: 77: /** 78: * Returns a string representing the object. 79: * 80: * @return The string. 81: */ 82: public String toString() { 83: return this.name; 84: } 85: 86: /** 87: * Returns <code>true</code> if this object is equal to the specified 88: * object, and <code>false</code> otherwise. 89: * 90: * @param obj the other object. 91: * 92: * @return A boolean. 93: */ 94: public boolean equals(Object obj) { 95: if (this == obj) { 96: return true; 97: } 98: if (!(obj instanceof DialShape)) { 99: return false; 100: } 101: DialShape shape = (DialShape) obj; 102: if (!this.name.equals(shape.toString())) { 103: return false; 104: } 105: return true; 106: } 107: 108: /** 109: * Returns a hash code for this instance. 110: * 111: * @return A hash code. 112: */ 113: public int hashCode() { 114: return this.name.hashCode(); 115: } 116: 117: /** 118: * Ensures that serialization returns the unique instances. 119: * 120: * @return The object. 121: * 122: * @throws ObjectStreamException if there is a problem. 123: */ 124: private Object readResolve() throws ObjectStreamException { 125: if (this.equals(DialShape.CIRCLE)) { 126: return DialShape.CIRCLE; 127: } 128: else if (this.equals(DialShape.CHORD)) { 129: return DialShape.CHORD; 130: } 131: else if (this.equals(DialShape.PIE)) { 132: return DialShape.PIE; 133: } 134: return null; 135: } 136: 137: }