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 043package org.jfree.ui; 044 045import java.io.ObjectStreamException; 046import 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 */ 054public 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}