libjava/java/sql/Date.java

   1 /* Date.java -- Wrapper around java.util.Date
   2    Copyright (C) 1999, 2000 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., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 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
  39 package java.sql;
  40
  41 import java.text.SimpleDateFormat;
  42
  43 /**
  44   * This class is a wrapper around java.util.Date to allow the JDBC
  45   * driver to identify the value as a SQL Date.
  46   *
  47   * @author Aaron M. Renn (arenn@urbanophile.com)
  48   */
  49 public class Date extends java.util.Date
  50 {
  51
  52 /*
  53  * Class Variables
  54  */
  55
  56 /**
  57   * Used for parsing and formatting this date.
  58   */
  59 private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
  60
  61 /**
  62   * This is the serialization UID for this class.
  63   */
  64 private static final long serialVersionUID = 1511598038487230103L;
  65
  66 /*************************************************************************/
  67
  68 /*
  69  * Class Methods
  70  */
  71
  72 /**
  73   * This method returns a new instance of this class by parsing a
  74   * date in JDBC format into a Java date.
  75   *
  76   * @param str The string to parse.
  77   *
  78   * @return The resulting <code>java.sql.Date</code> value.
  79   */
  80 public static Date
  81 valueOf(String str)
  82 {
  83   try
  84     {
  85       java.util.Date d = (java.util.Date)sdf.parseObject(str);
  86       return(new Date(d.getTime()));
  87     }
  88   catch(Exception e)
  89     {
  90       return(null);
  91     }
  92 }
  93
  94 /*************************************************************************/
  95
  96 /*
  97  * Constructors
  98  */
  99
 100 /**
 101   * This method initializes a new instance of this class with the
 102   * specified year, month, and day.
 103   *
 104   * @param year The year of this date minue 1900.
 105   * @param month The month of this date (0-11).
 106   * @param day The day of this date (1-31).
 107   *
 108   * @deprecated
 109   */
 110 public
 111 Date(int year, int month, int day)
 112 {
 113   super(year, month, day);
 114 }
 115
 116 /*************************************************************************/
 117
 118 /**
 119   * This method initializes a new instance of this class with the
 120   * specified time value representing the number of seconds since
 121   * Jan 1, 1970 at 12:00 midnight GMT.
 122   *
 123   * @param time The time value to intialize this date to.
 124   */
 125 public
 126 Date(long date)
 127 {
 128   super(date);
 129 }
 130
 131 /*************************************************************************/
 132
 133 /*
 134  * Instance Methods
 135  */
 136
 137 /**
 138   * This method returns this date in JDBC format.
 139   *
 140   * @return This date as a string.
 141   */
 142 public String
 143 toString()
 144 {
 145   return(sdf.format(this));
 146 }
 147
 148 } // class Date
 149