001 /* ========================================================================
002 * JCommon : a free general purpose class 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/jcommon/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 * HorizontalAlignment.java
029 * ------------------------
030 * (C) Copyright 2004, 2005, by Object Refinery Limited.
031 *
032 * Original Author: David Gilbert (for Object Refinery Limited);
033 * Contributor(s): -;
034 *
035 * $Id: HorizontalAlignment.java,v 1.5 2005/10/18 13:18:34 mungady Exp $
036 *
037 * Changes:
038 * --------
039 * 08-Jan-2004 : Version 1 (DG);
040 *
041 */
042
043 package org.jfree.ui;
044
045 import java.io.ObjectStreamException;
046 import java.io.Serializable;
047
048 /**
049 * An enumeration of the horizontal alignment types (<code>LEFT</code>,
050 * <code>RIGHT</code> and <code>CENTER</code>).
051 *
052 * @author David Gilbert
053 */
054 public final class HorizontalAlignment implements Serializable {
055
056 /** For serialization. */
057 private static final long serialVersionUID = -8249740987565309567L;
058
059 /** Left alignment. */
060 public static final HorizontalAlignment LEFT
061 = new HorizontalAlignment("HorizontalAlignment.LEFT");
062
063 /** Right alignment. */
064 public static final HorizontalAlignment RIGHT
065 = new HorizontalAlignment("HorizontalAlignment.RIGHT");
066
067 /** Center alignment. */
068 public static final HorizontalAlignment CENTER
069 = new HorizontalAlignment("HorizontalAlignment.CENTER");
070
071 /** The name. */
072 private String name;
073
074 /**
075 * Private constructor.
076 *
077 * @param name the name.
078 */
079 private HorizontalAlignment(final String name) {
080 this.name = name;
081 }
082
083 /**
084 * Returns a string representing the object.
085 *
086 * @return The string.
087 */
088 public String toString() {
089 return this.name;
090 }
091
092 /**
093 * Returns <code>true</code> if this object is equal to the specified
094 * object, and <code>false</code> otherwise.
095 *
096 * @param obj the object (<code>null</code> permitted).
097 *
098 * @return A boolean.
099 */
100 public boolean equals(final Object obj) {
101 if (this == obj) {
102 return true;
103 }
104 if (!(obj instanceof HorizontalAlignment)) {
105 return false;
106 }
107 final HorizontalAlignment that = (HorizontalAlignment) obj;
108 if (!this.name.equals(that.name)) {
109 return false;
110 }
111 return true;
112 }
113
114 /**
115 * Returns a hash code value for the object.
116 *
117 * @return The hashcode
118 */
119 public int hashCode() {
120 return this.name.hashCode();
121 }
122
123 /**
124 * Ensures that serialization returns the unique instances.
125 *
126 * @return The object.
127 *
128 * @throws ObjectStreamException if there is a problem.
129 */
130 private Object readResolve() throws ObjectStreamException {
131 HorizontalAlignment result = null;
132 if (this.equals(HorizontalAlignment.LEFT)) {
133 result = HorizontalAlignment.LEFT;
134 }
135 else if (this.equals(HorizontalAlignment.RIGHT)) {
136 result = HorizontalAlignment.RIGHT;
137 }
138 else if (this.equals(HorizontalAlignment.CENTER)) {
139 result = HorizontalAlignment.CENTER;
140 }
141 return result;
142 }
143
144 }