001/* DateTimeSyntax.java -- 002 Copyright (C) 2003, 2005 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038package javax.print.attribute; 039 040import java.io.Serializable; 041import java.util.Date; 042 043/** 044 * <code>DateTimeSyntax</code> is the abstract base class of all attribute 045 * classes having a date and a time as value. 046 * 047 * @author Michael Koch (konqueror@gmx.de) 048 */ 049public abstract class DateTimeSyntax implements Cloneable, Serializable 050{ 051 private static final long serialVersionUID = -1400819079791208582L; 052 053 private Date value; 054 055 /** 056 * Creates a <code>DateTimeSyntax</code> with a given value. 057 * 058 * @param value the date for this syntax 059 * 060 * @exception NullPointerException if value is null 061 */ 062 protected DateTimeSyntax(Date value) 063 { 064 if (value == null) 065 throw new NullPointerException("value may not be null"); 066 067 this.value = value; 068 } 069 070 /** 071 * Returns the date value of this object. 072 * 073 * @return The date value. 074 */ 075 public Date getValue() 076 { 077 return value; 078 } 079 080 /** 081 * Tests if the given object is equal to this one. 082 * 083 * @param obj the object to test 084 * 085 * @return <code>true</code> if both objects are equal, 086 * <code>false</code> otherwise. 087 */ 088 public boolean equals(Object obj) 089 { 090 if (! (obj instanceof DateTimeSyntax)) 091 return false; 092 093 return value.equals(((DateTimeSyntax) obj).getValue()); 094 } 095 096 /** 097 * Returns the hashcode for this object. 098 * 099 * @return The hashcode. 100 */ 101 public int hashCode() 102 { 103 return value.hashCode(); 104 } 105 106 /** 107 * Returns the string representation for this object. 108 * 109 * @return The string representation. 110 */ 111 public String toString() 112 { 113 return value.toString(); 114 } 115}