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1: /* =========================================================== 2: * JFreeChart : a free chart library for the Java(tm) platform 3: * =========================================================== 4: * 5: * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors. 6: * 7: * Project Info: http://www.jfree.org/jfreechart/index.html 8: * 9: * This library is free software; you can redistribute it and/or modify it 10: * under the terms of the GNU Lesser General Public License as published by 11: * the Free Software Foundation; either version 2.1 of the License, or 12: * (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but 15: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 17: * License for more details. 18: * 19: * You should have received a copy of the GNU Lesser General Public 20: * License along with this library; if not, write to the Free Software 21: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 22: * USA. 23: * 24: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 25: * in the United States and other countries.] 26: * 27: * ------------------------- 28: * DateTickMarkPosition.java 29: * ------------------------- 30: * (C) Copyright 2003-2007, by Object Refinery Limited. 31: * 32: * Original Author: David Gilbert (for Object Refinery Limited); 33: * Contributor(s): -; 34: * 35: * Changes: 36: * -------- 37: * 30-Apr-2003 : Version 1 (DG); 38: * 39: */ 40: 41: package org.jfree.chart.axis; 42: 43: import java.io.ObjectStreamException; 44: import java.io.Serializable; 45: 46: /** 47: * Used to indicate the required position of tick marks on a date axis relative 48: * to the underlying time period. 49: */ 50: public final class DateTickMarkPosition implements Serializable { 51: 52: /** For serialization. */ 53: private static final long serialVersionUID = 2540750672764537240L; 54: 55: /** Start of period. */ 56: public static final DateTickMarkPosition START 57: = new DateTickMarkPosition("DateTickMarkPosition.START"); 58: 59: /** Middle of period. */ 60: public static final DateTickMarkPosition MIDDLE 61: = new DateTickMarkPosition("DateTickMarkPosition.MIDDLE"); 62: 63: /** End of period. */ 64: public static final DateTickMarkPosition END 65: = new DateTickMarkPosition("DateTickMarkPosition.END"); 66: 67: /** The name. */ 68: private String name; 69: 70: /** 71: * Private constructor. 72: * 73: * @param name the name. 74: */ 75: private DateTickMarkPosition(String name) { 76: this.name = name; 77: } 78: 79: /** 80: * Returns a string representing the object. 81: * 82: * @return The string. 83: */ 84: public String toString() { 85: return this.name; 86: } 87: 88: /** 89: * Returns <code>true</code> if this object is equal to the specified 90: * object, and <code>false</code> otherwise. 91: * 92: * @param obj the other object. 93: * 94: * @return A boolean. 95: */ 96: public boolean equals(Object obj) { 97: 98: if (this == obj) { 99: return true; 100: } 101: if (!(obj instanceof DateTickMarkPosition)) { 102: return false; 103: } 104: DateTickMarkPosition position = (DateTickMarkPosition) obj; 105: if (!this.name.equals(position.toString())) { 106: return false; 107: } 108: return true; 109: 110: } 111: 112: /** 113: * Ensures that serialization returns the unique instances. 114: * 115: * @return The object. 116: * 117: * @throws ObjectStreamException if there is a problem. 118: */ 119: private Object readResolve() throws ObjectStreamException { 120: if (this.equals(DateTickMarkPosition.START)) { 121: return DateTickMarkPosition.START; 122: } 123: else if (this.equals(DateTickMarkPosition.MIDDLE)) { 124: return DateTickMarkPosition.MIDDLE; 125: } 126: else if (this.equals(DateTickMarkPosition.END)) { 127: return DateTickMarkPosition.END; 128: } 129: return null; 130: } 131: 132: 133: }