sascha@2357: package de.intevation.flys.utils;
sascha@2357:
sascha@2357: /**
sascha@2357: * Copyright (c) 2006 by Intevation GmbH
sascha@2357: *
sascha@2357: * @author Sascha L. Teichmann (teichmann@intevation.de)
sascha@2357: *
sascha@2357: * This program is free software under the LGPL (>=v2.1)
sascha@2357: * Read the file LGPL coming with FLYS for details.
sascha@2357: */
sascha@2357:
sascha@2357: import java.util.Date;
sascha@2357: import java.util.Calendar;
sascha@2357:
sascha@2357: import java.util.regex.Pattern;
sascha@2357: import java.util.regex.Matcher;
sascha@2357:
sascha@2357: public final class DateGuesser {
sascha@2357: public static final String [] MONTH = {
sascha@2357: "jan", "feb", "mrz", "apr", "mai", "jun",
sascha@2357: "jul", "aug", "sep", "okt", "nov", "dez"
sascha@2357: };
sascha@2357:
sascha@2357: public static final int guessMonth(String s) {
sascha@2357: s = s.toLowerCase();
sascha@2357: for (int i = 0; i < MONTH.length; ++i)
sascha@2357: if (MONTH[i].equals(s)) {
sascha@2357: return i;
sascha@2357: }
sascha@2357: return -1;
sascha@2357: }
sascha@2357:
sascha@2357: public static final Pattern YYYY_MM_DD =
sascha@2357: Pattern.compile("^(\\d{4})-(\\d{2})-(\\d{2})$");
sascha@2357:
sascha@2357: public static final Pattern DD_MM_YYYY =
sascha@2357: Pattern.compile("^(\\d{1,2})\\.(\\d{1,2})\\.(\\d{2,4})$");
sascha@2357:
sascha@2357: public static final Pattern MMM_YYYY =
sascha@2357: Pattern.compile("^(\\d{0,2})\\.?(\\w{3})\\.?(\\d{2,4})$");
sascha@2357:
sascha@2357: public static final Pattern GARBAGE_YYYY =
sascha@2357: Pattern.compile("^\\D*(\\d{2,4})$");
sascha@2357:
sascha@2357: public static final Pattern YYYY_MM_DDThh_mm =
sascha@2357: Pattern.compile("^(\\d{4})-(\\d{2})-(\\d{2})T(\\d{2}):(\\d{2})$");
sascha@2357:
sascha@2357: public static final Pattern YYYY_MM_DDThh_mm_ss =
sascha@2357: Pattern.compile("^(\\d{4})-(\\d{2})-(\\d{2})T(\\d{2}):(\\d{2}):(\\d{2})$");
sascha@2357:
sascha@2357: public static final Pattern DD_MM_YYYYThh_mm =
sascha@2357: Pattern.compile("^(\\d{1,2})\\.(\\d{1,2})\\.(\\d{2,4})T(\\d{1,2}):(\\d{2})$");
sascha@2357:
sascha@2357: public static final Pattern DD_MM_YYYYThh_mm_ss =
sascha@2357: Pattern.compile("^(\\d{1,2})\\.(\\d{1,2})\\.(\\d{2,4})T(\\d{1,2}):(\\d{2}):(\\d{2})$");
sascha@2357:
felix@4763: public static final Pattern DDMMYY =
felix@4763: Pattern.compile("^(\\d{1,2})(\\d{1,2})(\\d{1,2})$");
felix@4763:
sascha@2357: private DateGuesser() {
sascha@2357: }
sascha@2357:
sascha@2357: public static final int calendarMonth(String month) {
sascha@2357: return calendarMonth(Integer.parseInt(month));
sascha@2357: }
sascha@2357:
sascha@2357: public static final int calendarMonth(int month) {
sascha@2357: return Math.max(Math.min(month-1, 11), 0);
sascha@2357: }
sascha@2357:
felix@4764: /**
felix@4764: * Guess date by trying all different patterns.
felix@4764: * Throws IllegalArgumentException if not able to guess.
felix@4764: * @param s The date to be guessed (e.g. 11.02.2001).
felix@4764: * @return the parsed Date.
felix@4764: */
sascha@2357: public static Date guessDate(String s) {
sascha@2357: if (s == null || (s = s.trim()).length() == 0) {
sascha@2357: throw new IllegalArgumentException();
sascha@2357: }
sascha@2357:
sascha@2357: Matcher m;
sascha@2357:
sascha@2357: m = YYYY_MM_DD.matcher(s);
sascha@2357:
sascha@2357: if (m.matches()) {
sascha@2357: Calendar cal = Calendar.getInstance();
sascha@2357: String year = m.group(1);
sascha@2357: String month = m.group(2);
sascha@2357: String day = m.group(3);
sascha@2357: cal.set(
sascha@2357: Integer.parseInt(year),
sascha@2357: calendarMonth(month),
sascha@2357: Integer.parseInt(day),
sascha@2357: 12, 0, 0);
sascha@2357: return cal.getTime();
sascha@2357: }
sascha@2357:
sascha@2357: m = DD_MM_YYYY.matcher(s);
sascha@2357:
sascha@2357: if (m.matches()) {
sascha@2357: Calendar cal = Calendar.getInstance();
sascha@2357: String year = m.group(3);
sascha@2357: String month = m.group(2);
sascha@2357: String day = m.group(1);
sascha@2357: cal.set(
sascha@2357: Integer.parseInt(year) + (year.length() == 2 ? 1900 : 0),
sascha@2357: calendarMonth(month),
sascha@2357: Integer.parseInt(m.group(1)),
sascha@2357: 12, 0, 0);
sascha@2357: return cal.getTime();
sascha@2357: }
sascha@2357:
sascha@2357: m = MMM_YYYY.matcher(s);
sascha@2357:
sascha@2357: if (m.matches()) {
sascha@2357: int month = guessMonth(m.group(2));
sascha@2357: if (month >= 0) {
sascha@2357: Calendar cal = Calendar.getInstance();
sascha@2357: String year = m.group(3);
sascha@2357: String day = m.group(1);
sascha@2357: cal.set(
sascha@2357: Integer.parseInt(year) + (year.length() == 2 ? 1900 : 0),
sascha@2357: month,
sascha@2357: day.length() == 0 ? 15 : Integer.parseInt(day),
sascha@2357: 12, 0, 0);
sascha@2357: return cal.getTime();
sascha@2357: }
sascha@2357: }
sascha@2357:
sascha@2357: m = YYYY_MM_DDThh_mm.matcher(s);
sascha@2357:
sascha@2357: if (m.matches()) {
sascha@2357: Calendar cal = Calendar.getInstance();
sascha@2357: String year = m.group(1);
sascha@2357: String month = m.group(2);
sascha@2357: String day = m.group(3);
sascha@2357: String hour = m.group(4);
sascha@2357: String minute = m.group(5);
sascha@2357: cal.set(
sascha@2357: Integer.parseInt(year),
sascha@2357: calendarMonth(month),
sascha@2357: Integer.parseInt(day),
sascha@2357: Integer.parseInt(hour),
sascha@2357: Integer.parseInt(minute),
sascha@2357: 0
sascha@2357: );
sascha@2357: return cal.getTime();
sascha@2357: }
sascha@2357:
sascha@2357: m = YYYY_MM_DDThh_mm_ss.matcher(s);
sascha@2357:
sascha@2357: if (m.matches()) {
sascha@2357: Calendar cal = Calendar.getInstance();
sascha@2357: String year = m.group(1);
sascha@2357: String month = m.group(2);
sascha@2357: String day = m.group(3);
sascha@2357: String hour = m.group(4);
sascha@2357: String minute = m.group(5);
sascha@2357: String second = m.group(6);
sascha@2357: cal.set(
sascha@2357: Integer.parseInt(year),
sascha@2357: calendarMonth(month),
sascha@2357: Integer.parseInt(day),
sascha@2357: Integer.parseInt(hour),
sascha@2357: Integer.parseInt(minute),
sascha@2357: Integer.parseInt(second)
sascha@2357: );
sascha@2357: return cal.getTime();
sascha@2357: }
sascha@2357:
sascha@2357: m = DD_MM_YYYYThh_mm.matcher(s);
sascha@2357:
sascha@2357: if (m.matches()) {
sascha@2357: Calendar cal = Calendar.getInstance();
sascha@2357: String year = m.group(3);
sascha@2357: String month = m.group(2);
sascha@2357: String day = m.group(1);
sascha@2357: String hour = m.group(4);
sascha@2357: String minute = m.group(5);
sascha@2357: cal.set(
sascha@2357: Integer.parseInt(year) + (year.length() == 2 ? 1900 : 0),
sascha@2357: calendarMonth(month),
sascha@2357: Integer.parseInt(day),
sascha@2357: Integer.parseInt(hour),
sascha@2357: Integer.parseInt(minute),
sascha@2357: 0
sascha@2357: );
sascha@2357: return cal.getTime();
sascha@2357: }
sascha@2357:
sascha@2357: m = DD_MM_YYYYThh_mm_ss.matcher(s);
sascha@2357:
sascha@2357: if (m.matches()) {
sascha@2357: Calendar cal = Calendar.getInstance();
sascha@2357: String year = m.group(3);
sascha@2357: String month = m.group(2);
sascha@2357: String day = m.group(1);
sascha@2357: String hour = m.group(4);
sascha@2357: String minute = m.group(5);
sascha@2357: String second = m.group(6);
sascha@2357: cal.set(
sascha@2357: Integer.parseInt(year) + (year.length() == 2 ? 1900 : 0),
sascha@2357: calendarMonth(month),
sascha@2357: Integer.parseInt(day),
sascha@2357: Integer.parseInt(hour),
sascha@2357: Integer.parseInt(minute),
sascha@2357: Integer.parseInt(second)
sascha@2357: );
sascha@2357: return cal.getTime();
sascha@2357: }
sascha@2357:
felix@4763: m = DDMMYY.matcher(s);
felix@4763:
felix@4763: if (m.matches()) {
felix@4763: Calendar cal = Calendar.getInstance();
felix@4763: String day = m.group(1);
felix@4763: String month = m.group(2);
teichmann@4770: String yearS = m.group(3);
teichmann@4770: int year = Integer.parseInt(yearS);
teichmann@4770:
teichmann@4770: if (year <= cal.get(Calendar.YEAR) % 100) {
felix@4763: year += 2000;
felix@4763: }
felix@4763: else {
felix@4763: year += 1900;
felix@4763: }
felix@4763: cal.set(
felix@4763: year,
felix@4763: Integer.parseInt(month), // month
felix@4763: Integer.parseInt(day), // day
felix@4763: 12, 0, 0);
felix@4763: return cal.getTime();
felix@4763: }
felix@4763:
sascha@2357: m = GARBAGE_YYYY.matcher(s);
sascha@2357:
sascha@2357: if (m.matches()) {
sascha@2357: Calendar cal = Calendar.getInstance();
sascha@2357: String year = m.group(1);
sascha@2357: cal.set(
sascha@2357: Integer.parseInt(year) + (year.length() == 2 ? 1900 : 0),
sascha@2357: 5, // month
sascha@2357: 15, // day
sascha@2357: 12, 0, 0);
sascha@2357: return cal.getTime();
sascha@2357: }
sascha@2357:
sascha@2357: throw new IllegalArgumentException();
sascha@2357: }
sascha@2357:
sascha@2357: public static void main(String [] args) {
sascha@2357: for (int i = 0; i < args.length; ++i) {
sascha@2357: System.out.println(args[i] + ": " + guessDate(args[i]));
sascha@2357: }
sascha@2357: }
sascha@2357: }
sascha@2357: // end of file