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;
41 public class DateTimeFunctions {
43 * private parameter-less constructor to prevent construction
45 private static LoggerWrapper logger = new LoggerWrapper("Utility.DatTimeFunctions");
48 private DateTimeFunctions() {
52 * Function to parse a <a href="http://www.w3.org/TR/NOTE-datetime">W3CDTF</a> formatted string.
55 * YYYY[-MM[-DD[Thh:mm[:ss[.s*]]TZD]]]
60 private final static String SPACE = "[\t\n\r ]*";
61 private final static String NUMBER = "[0-9]*";
62 private final static String TWODIGITNUMBER = "[0-9][0-9]";
63 private final static String FOURDIGITNUMBER = "[0-9][0-9][0-9][0-9]";
64 private final static String FRACTION = "(\\.[0-9]*)|)";
65 private final static String SIGN = "[-+]";
66 private final static String TZD = "(Z|(+|-)([0-9][0-9]:[0-9][0-9]|[0-9][0-9][0-9][0-9]))";
68 public static Date parseW3CDTFString(String aString) throws UtilExc, UtilFailure {
79 boolean negativeOffset = false;
82 SimpleParser parser = new SimpleParser(aString.trim());
83 String part = parser.parse(NUMBER);
84 year=Integer.parseInt(part);
85 if (parser.parses("-")) {
87 part = parser.parse(NUMBER);
88 month = Integer.parseInt(part);
89 if (parser.parses("-")) {
91 part = parser.parse(NUMBER);
92 day = Integer.parseInt(part);
93 if (parser.parses("T")) {
95 part = parser.parse(NUMBER);
96 hour = Integer.parseInt(part);
98 part = parser.parse(NUMBER);
99 minute = Integer.parseInt(part);
100 if (parser.parses(":")) {
102 part = parser.parse(NUMBER);
103 second = Integer.parseInt(part);
104 if (parser.parses("\\.")) {
106 part = parser.parse(NUMBER).substring(0,3);
107 while (part.length()<3)
109 millisecond = Integer.parseInt(part);
112 if (parser.parses("Z|\\+|-")) {
113 String sign = parser.parse("Z|\\+|-");
114 if (sign.equals("+") || sign.equals("-")) {
115 if (parser.parses(TWODIGITNUMBER)) {
116 part = parser.parse(TWODIGITNUMBER);
117 houroffset = Integer.parseInt(part);
119 if (parser.parses(":"))
121 if (parser.parses(TWODIGITNUMBER)) {
122 part = parser.parse(TWODIGITNUMBER);
123 minuteoffset = Integer.parseInt(part);
126 if (sign.equals("-")) {
137 String timeZoneID = "GMT";
139 timeZoneID = timeZoneID+"-";
140 timeZoneID = timeZoneID + StringRoutines.padStringLeft(Integer.toString(houroffset), 2, '0') +
141 StringRoutines.padStringLeft(Integer.toString(minuteoffset), 2, '0');
144 TimeZone zone = TimeZone.getTimeZone(timeZoneID);
146 Calendar calendar = new GregorianCalendar(zone);
147 calendar.set(year, month-1, day, hour, minute, second);
148 calendar.set(Calendar.MILLISECOND, millisecond);
150 return calendar.getTime();
152 catch (Throwable t) {
153 logger.error("DateTimeFunctions.parseW3CDTFString: error parsing " + aString + ": " + t.toString());
155 throw new UtilFailure(t);
159 public static String advancedDateFormat(String aFormat, Date aDate, String aTimeZone) {
160 return advancedDateFormat(aFormat, aDate, TimeZone.getTimeZone(aTimeZone));
163 public static String advancedDateFormat(String aFormat, Date aDate, TimeZone aTimeZone) {
164 SimpleDateFormat simpleFormat = new SimpleDateFormat(aFormat);
166 simpleFormat.setTimeZone(aTimeZone);
167 return simpleFormat.format(aDate);
170 public static String dateToSortableString(Date aDate) {
171 return advancedDateFormat("yyyyMMddHHmmss", aDate, "GMT");