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: * LegendRenderingOrder.java
029: * -------------------------
030: * (C) Copyright 2004, 2005, by Object Refinery Limited and Contributors.
031: *
032: * Original Author: Angel;
033: * Contributor(s): -;
034: *
035: * $Id: LegendRenderingOrder.java,v 1.4.2.1 2005/10/25 16:50:20 mungady Exp $
036: *
037: * Changes
038: * -------
039: * 26-Mar-2004 : Version 1 (DG);
040: *
041: */
042:
043: package org.jfree.chart;
044:
045: import java.io.ObjectStreamException;
046: import java.io.Serializable;
047:
048: /**
049: * Represents the order for rendering legend items.
050: */
051: public final class LegendRenderingOrder implements Serializable {
052:
053: /** For serialization. */
054: private static final long serialVersionUID = -3832486612685808616L;
055:
056: /** In order. */
057: public static final LegendRenderingOrder STANDARD = new LegendRenderingOrder(
058: "LegendRenderingOrder.STANDARD");
059:
060: /** In reverse order. */
061: public static final LegendRenderingOrder REVERSE = new LegendRenderingOrder(
062: "LegendRenderingOrder.REVERSE");
063:
064: /** The name. */
065: private String name;
066:
067: /**
068: * Private constructor.
069: *
070: * @param name the name.
071: */
072: private LegendRenderingOrder(String name) {
073: this .name = name;
074: }
075:
076: /**
077: * Returns a string representing the object.
078: *
079: * @return The string.
080: */
081: public String toString() {
082: return this .name;
083: }
084:
085: /**
086: * Returns <code>true</code> if this object is equal to the specified
087: * object, and <code>false</code> otherwise.
088: *
089: * @param obj the other object.
090: *
091: * @return A boolean.
092: */
093: public boolean equals(Object obj) {
094: if (this == obj) {
095: return true;
096: }
097: if (!(obj instanceof LegendRenderingOrder)) {
098: return false;
099: }
100: LegendRenderingOrder order = (LegendRenderingOrder) obj;
101: if (!this .name.equals(order.toString())) {
102: return false;
103: }
104: return true;
105: }
106:
107: /**
108: * Ensures that serialization returns the unique instances.
109: *
110: * @return The object.
111: *
112: * @throws ObjectStreamException if there is a problem.
113: */
114: private Object readResolve() throws ObjectStreamException {
115: if (this.equals(LegendRenderingOrder.STANDARD)) {
116: return LegendRenderingOrder.STANDARD;
117: } else if (this.equals(LegendRenderingOrder.REVERSE)) {
118: return LegendRenderingOrder.REVERSE;
119: }
120: return null;
121: }
122:
123: }
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