001 /* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2008, 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 * PieLabelLinkStyle.java
029 * ----------------------
030 * (C) Copyright 2008, by Object Refinery Limited.
031 *
032 * Original Author: David Gilbert (for Object Refinery Limited);
033 * Contributor(s): -;
034 *
035 * Changes:
036 * --------
037 * 31-Mar-2008 : Version 1 (DG);
038 *
039 */
040
041 package org.jfree.chart.plot;
042
043 import java.io.ObjectStreamException;
044 import java.io.Serializable;
045
046 /**
047 * Used to indicate the style for the lines linking pie sections to their
048 * corresponding labels.
049 *
050 * @since 1.0.10
051 */
052 public final class PieLabelLinkStyle implements Serializable {
053
054 /** STANDARD. */
055 public static final PieLabelLinkStyle STANDARD
056 = new PieLabelLinkStyle("PieLabelLinkStyle.STANDARD");
057
058 /** QUAD_CURVE. */
059 public static final PieLabelLinkStyle QUAD_CURVE
060 = new PieLabelLinkStyle("PieLabelLinkStyle.QUAD_CURVE");
061
062 /** CUBIC_CURVE. */
063 public static final PieLabelLinkStyle CUBIC_CURVE
064 = new PieLabelLinkStyle("PieLabelLinkStyle.CUBIC_CURVE");
065
066 /** The name. */
067 private String name;
068
069 /**
070 * Private constructor.
071 *
072 * @param name the name.
073 */
074 private PieLabelLinkStyle(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 object (<code>null</code> permitted).
092 *
093 * @return A boolean.
094 */
095 public boolean equals(Object obj) {
096 if (this == obj) {
097 return true;
098 }
099 if (!(obj instanceof PieLabelLinkStyle)) {
100 return false;
101 }
102 PieLabelLinkStyle style = (PieLabelLinkStyle) obj;
103 if (!this.name.equals(style.toString())) {
104 return false;
105 }
106 return true;
107 }
108
109 /**
110 * Returns a hash code for this instance.
111 *
112 * @return A hash code.
113 */
114 public int hashCode() {
115 return this.name.hashCode();
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 Object result = null;
127 if (this.equals(PieLabelLinkStyle.STANDARD)) {
128 result = PieLabelLinkStyle.STANDARD;
129 }
130 else if (this.equals(PieLabelLinkStyle.QUAD_CURVE)) {
131 result = PieLabelLinkStyle.QUAD_CURVE;
132 }
133 else if (this.equals(PieLabelLinkStyle.CUBIC_CURVE)) {
134 result = PieLabelLinkStyle.CUBIC_CURVE;
135 }
136 return result;
137 }
138
139 }