2 * Copyright (C) 2001, 2002 The Mir-coders group
4 * This file is part of Mir.
6 * Mir 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 of the License, or
9 * (at your option) any later version.
11 * Mir is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Mir; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * In addition, as a special exception, The Mir-coders gives permission to link
21 * the code of this program with any library licensed under the Apache Software License,
22 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
23 * (or with modified versions of the above that use the same license as the above),
24 * and distribute linked combinations including the two. You must obey the
25 * GNU General Public License in all respects for all of the code used other than
26 * the above mentioned libraries. If you modify this file, you may extend this
27 * exception to your version of the file, but you are not obligated to do so.
28 * If you do not wish to do so, delete this exception statement from your version.
32 import java.text.SimpleDateFormat;
33 import java.util.Calendar;
34 import java.util.Date;
35 import java.util.GregorianCalendar;
36 import java.util.SimpleTimeZone;
37 import java.util.TimeZone;
39 public class DateTimeFunctions {
41 * private parameter-less constructor to prevent construction
43 private DateTimeFunctions() {
47 * Function to parse a <a href="http://www.w3.org/TR/NOTE-datetime">W3CDTF</a> formatted string.
50 * YYYY[-MM[-DD[Thh:mm[:ss[.s*]]TZD]]]
55 private final static String SPACE = "[\t\n\r ]*";
56 private final static String NUMBER = "[0-9]*";
57 private final static String TWODIGITNUMBER = "[0-9][0-9]";
58 private final static String FOURDIGITNUMBER = "[0-9][0-9][0-9][0-9]";
59 private final static String FRACTION = "(\\.[0-9]*)|)";
60 private final static String SIGN = "[-+]";
61 private final static String TZD = "(Z|(+|-)([0-9][0-9]:[0-9][0-9]|[0-9][0-9][0-9][0-9]))";
63 public static Date parseW3CDTFString(String aString) throws UtilExc, UtilFailure {
75 SimpleParser parser = new SimpleParser(aString.trim());
76 String part = parser.parse(NUMBER);
77 year=Integer.parseInt(part);
78 if (parser.parses("-")) {
80 part = parser.parse(NUMBER);
81 month = Integer.parseInt(part);
82 if (parser.parses("-")) {
84 part = parser.parse(NUMBER);
85 day = Integer.parseInt(part);
86 if (parser.parses("T")) {
88 part = parser.parse(NUMBER);
89 hour = Integer.parseInt(part);
91 part = parser.parse(NUMBER);
92 minute = Integer.parseInt(part);
93 if (parser.parses(":")) {
95 part = parser.parse(NUMBER);
96 second = Integer.parseInt(part);
97 if (parser.parses("\\.")) {
99 part = parser.parse(NUMBER).substring(0,3);
100 while (part.length()<3)
102 millisecond = Integer.parseInt(part);
105 if (parser.parses("Z|\\+|-")) {
106 String sign = parser.parse("Z|\\+|-");
107 if (sign.equals("+") || sign.equals("-")) {
108 if (parser.parses(TWODIGITNUMBER)) {
109 part = parser.parse(TWODIGITNUMBER);
110 houroffset = Integer.parseInt(part);
112 if (parser.parses(":"))
114 if (parser.parses(TWODIGITNUMBER)) {
115 part = parser.parse(TWODIGITNUMBER);
116 minuteoffset = Integer.parseInt(part);
119 if (sign.equals("-")) {
120 houroffset = -houroffset;
121 minuteoffset = - minuteoffset;
132 String[] ids = TimeZone.getAvailableIDs((houroffset * 60 + minuteoffset) * 60 * 1000);
133 String timeZoneID = "custom";
136 SimpleTimeZone pdt = new SimpleTimeZone((houroffset * 60 + minuteoffset) * 60 * 1000, timeZoneID);
138 Calendar calendar = new GregorianCalendar(pdt);
139 calendar.set(year, month, day, hour, minute, second);
140 calendar.set(Calendar.MILLISECOND, millisecond);
142 System.out.println(aString + " -> " + new SimpleDateFormat("yyyy-dd-MM HH:mm Z").format(calendar.getTime()));
144 return calendar.getTime();
146 catch (Throwable t) {
147 System.out.println(aString + " -> " + t.toString());
149 throw new UtilFailure(t);