001 /* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
006 *
007 * Project Info: http://www.jfree.org/jfreechart/index.html
008 *
009 * This library is free software; you can redistribute it and/or modify it
010 * under the terms of the GNU Lesser General Public License as published by
011 * the Free Software Foundation; either version 2.1 of the License, or
012 * (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but
015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017 * License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this library; if not, write to the Free Software
021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
022 * USA.
023 *
024 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
025 * in the United States and other countries.]
026 *
027 * --------------
028 * DialShape.java
029 * --------------
030 * (C) Copyright 2003-2005, by Object Refinery Limited.
031 *
032 * Original Author: David Gilbert (for Object Refinery Limited);
033 * Contributor(s): -;
034 *
035 * $Id: DialShape.java,v 1.4.2.1 2005/10/25 20:52:08 mungady Exp $
036 *
037 * Changes:
038 * --------
039 * 20-Aug-2003 : Version 1 (DG);
040 *
041 */
042
043 package org.jfree.chart.plot;
044
045 import java.io.ObjectStreamException;
046 import java.io.Serializable;
047
048 /**
049 * Used to indicate the background shape for a
050 * {@link org.jfree.chart.plot.MeterPlot}.
051 */
052 public final class DialShape implements Serializable {
053
054 /** For serialization. */
055 private static final long serialVersionUID = -3471933055190251131L;
056
057 /** Circle. */
058 public static final DialShape CIRCLE = new DialShape("DialShape.CIRCLE");
059
060 /** Chord. */
061 public static final DialShape CHORD = new DialShape("DialShape.CHORD");
062
063 /** Pie. */
064 public static final DialShape PIE = new DialShape("DialShape.PIE");
065
066 /** The name. */
067 private String name;
068
069 /**
070 * Private constructor.
071 *
072 * @param name the name.
073 */
074 private DialShape(String name) {
075 this.name = name;
076 }
077
078 /**
079 * Returns a string representing the object.
080 *
081 * @return The string.
082 */
083 public String toString() {
084 return this.name;
085 }
086
087 /**
088 * Returns <code>true</code> if this object is equal to the specified
089 * object, and <code>false</code> otherwise.
090 *
091 * @param obj the other object.
092 *
093 * @return A boolean.
094 */
095 public boolean equals(Object obj) {
096 if (this == obj) {
097 return true;
098 }
099 if (!(obj instanceof DialShape)) {
100 return false;
101 }
102 DialShape shape = (DialShape) obj;
103 if (!this.name.equals(shape.toString())) {
104 return false;
105 }
106 return true;
107 }
108
109 /**
110 * Ensures that serialization returns the unique instances.
111 *
112 * @return The object.
113 *
114 * @throws ObjectStreamException if there is a problem.
115 */
116 private Object readResolve() throws ObjectStreamException {
117 if (this.equals(DialShape.CIRCLE)) {
118 return DialShape.CIRCLE;
119 }
120 else if (this.equals(DialShape.CHORD)) {
121 return DialShape.CHORD;
122 }
123 else if (this.equals(DialShape.PIE)) {
124 return DialShape.PIE;
125 }
126 return null;
127 }
128
129 }