Source for javax.print.attribute.DateTimeSyntax

   1: /* DateTimeSyntax.java -- 
   2:    Copyright (C) 2003, 2005 Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: package javax.print.attribute;
  39: 
  40: import java.io.Serializable;
  41: import java.util.Date;
  42: 
  43: /**
  44:  * <code>DateTimeSyntax</code> is the abstract base class of all attribute 
  45:  * classes having a date and a time as value.
  46:  * 
  47:  * @author Michael Koch (konqueror@gmx.de)
  48:  */
  49: public abstract class DateTimeSyntax implements Cloneable, Serializable
  50: {
  51:   private static final long serialVersionUID = -1400819079791208582L;
  52:   
  53:   private Date value;
  54:   
  55:   /**
  56:    * Creates a <code>DateTimeSyntax</code> with a given value.
  57:    *
  58:    * @param value the date for this syntax
  59:    *
  60:    * @exception NullPointerException if value is null
  61:    */
  62:   protected DateTimeSyntax(Date value)
  63:   {
  64:     if (value == null)
  65:       throw new NullPointerException("value may not be null");
  66: 
  67:     this.value = value;
  68:   }
  69: 
  70:   /**
  71:    * Returns the date value of this object.
  72:    *
  73:    * @return The date value.
  74:    */
  75:   public Date getValue()
  76:   {
  77:     return value;
  78:   }
  79: 
  80:   /**
  81:    * Tests if the given object is equal to this one.
  82:    * 
  83:    * @param obj the object to test
  84:    *
  85:    * @return <code>true</code> if both objects are equal, 
  86:    * <code>false</code> otherwise.
  87:    */
  88:   public boolean equals(Object obj)
  89:   {
  90:     if (! (obj instanceof DateTimeSyntax))
  91:       return false;
  92: 
  93:     return value.equals(((DateTimeSyntax) obj).getValue());
  94:   }
  95: 
  96:   /**
  97:    * Returns the hashcode for this object.
  98:    *
  99:    * @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: }