001 /* DateTimeSyntax.java --
002 Copyright (C) 2003, 2005 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038 package javax.print.attribute;
039
040 import java.io.Serializable;
041 import 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 */
049 public 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 }