Mercurial > dive4elements > river
diff flys-backend/src/main/java/de/intevation/flys/utils/DateGuesser.java @ 3815:ecab7e7804a9 pre2.6-2012-01-04
merged flys-backend/pre2.6-2012-01-04
| author | Thomas Arendsen Hein <thomas@intevation.de> |
|---|---|
| date | Fri, 28 Sep 2012 12:14:57 +0200 |
| parents | 2e18e12fac11 |
| children | 8195396b23ce |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-backend/src/main/java/de/intevation/flys/utils/DateGuesser.java Fri Sep 28 12:14:57 2012 +0200 @@ -0,0 +1,226 @@ +package de.intevation.flys.utils; + +/** + * Copyright (c) 2006 by Intevation GmbH + * + * @author Sascha L. Teichmann (teichmann@intevation.de) + * + * This program is free software under the LGPL (>=v2.1) + * Read the file LGPL coming with FLYS for details. + */ + +import java.util.Date; +import java.util.Calendar; + +import java.util.regex.Pattern; +import java.util.regex.Matcher; + +public final class DateGuesser { + public static final String [] MONTH = { + "jan", "feb", "mrz", "apr", "mai", "jun", + "jul", "aug", "sep", "okt", "nov", "dez" + }; + + public static final int guessMonth(String s) { + s = s.toLowerCase(); + for (int i = 0; i < MONTH.length; ++i) + if (MONTH[i].equals(s)) { + return i; + } + return -1; + } + + public static final Pattern YYYY_MM_DD = + Pattern.compile("^(\\d{4})-(\\d{2})-(\\d{2})$"); + + public static final Pattern DD_MM_YYYY = + Pattern.compile("^(\\d{1,2})\\.(\\d{1,2})\\.(\\d{2,4})$"); + + public static final Pattern MMM_YYYY = + Pattern.compile("^(\\d{0,2})\\.?(\\w{3})\\.?(\\d{2,4})$"); + + public static final Pattern GARBAGE_YYYY = + Pattern.compile("^\\D*(\\d{2,4})$"); + + public static final Pattern YYYY_MM_DDThh_mm = + Pattern.compile("^(\\d{4})-(\\d{2})-(\\d{2})T(\\d{2}):(\\d{2})$"); + + public static final Pattern YYYY_MM_DDThh_mm_ss = + Pattern.compile("^(\\d{4})-(\\d{2})-(\\d{2})T(\\d{2}):(\\d{2}):(\\d{2})$"); + + public static final Pattern DD_MM_YYYYThh_mm = + Pattern.compile("^(\\d{1,2})\\.(\\d{1,2})\\.(\\d{2,4})T(\\d{1,2}):(\\d{2})$"); + + public static final Pattern DD_MM_YYYYThh_mm_ss = + Pattern.compile("^(\\d{1,2})\\.(\\d{1,2})\\.(\\d{2,4})T(\\d{1,2}):(\\d{2}):(\\d{2})$"); + + private DateGuesser() { + } + + public static final int calendarMonth(String month) { + return calendarMonth(Integer.parseInt(month)); + } + + public static final int calendarMonth(int month) { + return Math.max(Math.min(month-1, 11), 0); + } + + public static Date guessDate(String s) { + if (s == null || (s = s.trim()).length() == 0) { + throw new IllegalArgumentException(); + } + + Matcher m; + + m = YYYY_MM_DD.matcher(s); + + if (m.matches()) { + Calendar cal = Calendar.getInstance(); + String year = m.group(1); + String month = m.group(2); + String day = m.group(3); + cal.set( + Integer.parseInt(year), + calendarMonth(month), + Integer.parseInt(day), + 12, 0, 0); + return cal.getTime(); + } + + m = DD_MM_YYYY.matcher(s); + + if (m.matches()) { + Calendar cal = Calendar.getInstance(); + String year = m.group(3); + String month = m.group(2); + String day = m.group(1); + cal.set( + Integer.parseInt(year) + (year.length() == 2 ? 1900 : 0), + calendarMonth(month), + Integer.parseInt(m.group(1)), + 12, 0, 0); + return cal.getTime(); + } + + m = MMM_YYYY.matcher(s); + + if (m.matches()) { + int month = guessMonth(m.group(2)); + if (month >= 0) { + Calendar cal = Calendar.getInstance(); + String year = m.group(3); + String day = m.group(1); + cal.set( + Integer.parseInt(year) + (year.length() == 2 ? 1900 : 0), + month, + day.length() == 0 ? 15 : Integer.parseInt(day), + 12, 0, 0); + return cal.getTime(); + } + } + + m = YYYY_MM_DDThh_mm.matcher(s); + + if (m.matches()) { + Calendar cal = Calendar.getInstance(); + String year = m.group(1); + String month = m.group(2); + String day = m.group(3); + String hour = m.group(4); + String minute = m.group(5); + cal.set( + Integer.parseInt(year), + calendarMonth(month), + Integer.parseInt(day), + Integer.parseInt(hour), + Integer.parseInt(minute), + 0 + ); + return cal.getTime(); + } + + m = YYYY_MM_DDThh_mm_ss.matcher(s); + + if (m.matches()) { + Calendar cal = Calendar.getInstance(); + String year = m.group(1); + String month = m.group(2); + String day = m.group(3); + String hour = m.group(4); + String minute = m.group(5); + String second = m.group(6); + cal.set( + Integer.parseInt(year), + calendarMonth(month), + Integer.parseInt(day), + Integer.parseInt(hour), + Integer.parseInt(minute), + Integer.parseInt(second) + ); + return cal.getTime(); + } + + m = DD_MM_YYYYThh_mm.matcher(s); + + if (m.matches()) { + Calendar cal = Calendar.getInstance(); + String year = m.group(3); + String month = m.group(2); + String day = m.group(1); + String hour = m.group(4); + String minute = m.group(5); + cal.set( + Integer.parseInt(year) + (year.length() == 2 ? 1900 : 0), + calendarMonth(month), + Integer.parseInt(day), + Integer.parseInt(hour), + Integer.parseInt(minute), + 0 + ); + return cal.getTime(); + } + + m = DD_MM_YYYYThh_mm_ss.matcher(s); + + if (m.matches()) { + Calendar cal = Calendar.getInstance(); + String year = m.group(3); + String month = m.group(2); + String day = m.group(1); + String hour = m.group(4); + String minute = m.group(5); + String second = m.group(6); + cal.set( + Integer.parseInt(year) + (year.length() == 2 ? 1900 : 0), + calendarMonth(month), + Integer.parseInt(day), + Integer.parseInt(hour), + Integer.parseInt(minute), + Integer.parseInt(second) + ); + return cal.getTime(); + } + + m = GARBAGE_YYYY.matcher(s); + + if (m.matches()) { + Calendar cal = Calendar.getInstance(); + String year = m.group(1); + cal.set( + Integer.parseInt(year) + (year.length() == 2 ? 1900 : 0), + 5, // month + 15, // day + 12, 0, 0); + return cal.getTime(); + } + + throw new IllegalArgumentException(); + } + + public static void main(String [] args) { + for (int i = 0; i < args.length; ++i) { + System.out.println(args[i] + ": " + guessDate(args[i])); + } + } +} +// end of file