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 * DateTickMarkPosition.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: DateTickMarkPosition.java,v 1.4.2.1 2005/10/25 20:37:34 mungady Exp $ 036 * 037 * Changes: 038 * -------- 039 * 30-Apr-2003 : Version 1 (DG); 040 * 041 */ 042 043 package org.jfree.chart.axis; 044 045 import java.io.ObjectStreamException; 046 import java.io.Serializable; 047 048 /** 049 * Used to indicate the required position of tick marks on a date axis relative 050 * to the underlying time period. 051 */ 052 public final class DateTickMarkPosition implements Serializable { 053 054 /** For serialization. */ 055 private static final long serialVersionUID = 2540750672764537240L; 056 057 /** Start of period. */ 058 public static final DateTickMarkPosition START 059 = new DateTickMarkPosition("DateTickMarkPosition.START"); 060 061 /** Middle of period. */ 062 public static final DateTickMarkPosition MIDDLE 063 = new DateTickMarkPosition("DateTickMarkPosition.MIDDLE"); 064 065 /** End of period. */ 066 public static final DateTickMarkPosition END 067 = new DateTickMarkPosition("DateTickMarkPosition.END"); 068 069 /** The name. */ 070 private String name; 071 072 /** 073 * Private constructor. 074 * 075 * @param name the name. 076 */ 077 private DateTickMarkPosition(String name) { 078 this.name = name; 079 } 080 081 /** 082 * Returns a string representing the object. 083 * 084 * @return The string. 085 */ 086 public String toString() { 087 return this.name; 088 } 089 090 /** 091 * Returns <code>true</code> if this object is equal to the specified 092 * object, and <code>false</code> otherwise. 093 * 094 * @param obj the other object. 095 * 096 * @return A boolean. 097 */ 098 public boolean equals(Object obj) { 099 100 if (this == obj) { 101 return true; 102 } 103 if (!(obj instanceof DateTickMarkPosition)) { 104 return false; 105 } 106 DateTickMarkPosition position = (DateTickMarkPosition) obj; 107 if (!this.name.equals(position.toString())) { 108 return false; 109 } 110 return true; 111 112 } 113 114 /** 115 * Ensures that serialization returns the unique instances. 116 * 117 * @return The object. 118 * 119 * @throws ObjectStreamException if there is a problem. 120 */ 121 private Object readResolve() throws ObjectStreamException { 122 if (this.equals(DateTickMarkPosition.START)) { 123 return DateTickMarkPosition.START; 124 } 125 else if (this.equals(DateTickMarkPosition.MIDDLE)) { 126 return DateTickMarkPosition.MIDDLE; 127 } 128 else if (this.equals(DateTickMarkPosition.END)) { 129 return DateTickMarkPosition.END; 130 } 131 return null; 132 } 133 134 135 }