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(
059: "DialShape.CIRCLE");
060:
061: /** Chord. */
062: public static final DialShape CHORD = new DialShape(
063: "DialShape.CHORD");
064:
065: /** Pie. */
066: public static final DialShape PIE = new DialShape("DialShape.PIE");
067:
068: /** The name. */
069: private String name;
070:
071: /**
072: * Private constructor.
073: *
074: * @param name the name.
075: */
076: private DialShape(String name) {
077: this .name = name;
078: }
079:
080: /**
081: * Returns a string representing the object.
082: *
083: * @return The string.
084: */
085: public String toString() {
086: return this .name;
087: }
088:
089: /**
090: * Returns <code>true</code> if this object is equal to the specified
091: * object, and <code>false</code> otherwise.
092: *
093: * @param obj the other object.
094: *
095: * @return A boolean.
096: */
097: public boolean equals(Object obj) {
098: if (this == obj) {
099: return true;
100: }
101: if (!(obj instanceof DialShape)) {
102: return false;
103: }
104: DialShape shape = (DialShape) obj;
105: if (!this .name.equals(shape.toString())) {
106: return false;
107: }
108: return true;
109: }
110:
111: /**
112: * Ensures that serialization returns the unique instances.
113: *
114: * @return The object.
115: *
116: * @throws ObjectStreamException if there is a problem.
117: */
118: private Object readResolve() throws ObjectStreamException {
119: if (this.equals(DialShape.CIRCLE)) {
120: return DialShape.CIRCLE;
121: } else if (this.equals(DialShape.CHORD)) {
122: return DialShape.CHORD;
123: } else if (this.equals(DialShape.PIE)) {
124: return DialShape.PIE;
125: }
126: return null;
127: }
128:
129: }
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