public static long parseDate()

in modules/luni/src/main/java/org/apache/harmony/luni/util/Util.java [120:213]
89 lines of code
49 McCabe index (conditional complexity)

	public static long parseDate(String string) {
		int offset = 0, length = string.length(), state = 0;
		int year = -1, month = -1, date = -1;
		int hour = -1, minute = -1, second = -1;
		final int PAD = 0, LETTERS = 1, NUMBERS = 2;
		StringBuilder buffer = new StringBuilder();

		while (offset <= length) {
			char next = offset < length ? string.charAt(offset) : '\r';
			offset++;

			int nextState;
			if ((next >= 'a' && next <= 'z') || (next >= 'A' && next <= 'Z'))
				nextState = LETTERS;
			else if (next >= '0' && next <= '9')
				nextState = NUMBERS;
			else if (" ,-:\r\t".indexOf(next) == -1)
				throw new IllegalArgumentException();
			else
				nextState = PAD;

			if (state == NUMBERS && nextState != NUMBERS) {
				int digit = Integer.parseInt(buffer.toString());
				buffer.setLength(0);
				if (digit >= 70) {
					if (year != -1
							|| (next != ' ' && next != ',' && next != '\r'))
						throw new IllegalArgumentException();
					year = digit;
				} else if (next == ':') {
					if (hour == -1)
						hour = digit;
					else if (minute == -1)
						minute = digit;
					else
						throw new IllegalArgumentException();
				} else if (next == ' ' || next == ',' || next == '-'
						|| next == '\r') {
					if (hour != -1 && minute == -1)
						minute = digit;
					else if (minute != -1 && second == -1)
						second = digit;
					else if (date == -1)
						date = digit;
					else if (year == -1)
						year = digit;
					else
						throw new IllegalArgumentException();
				} else if (year == -1 && month != -1 && date != -1)
					year = digit;
				else
					throw new IllegalArgumentException();
			} else if (state == LETTERS && nextState != LETTERS) {
				String text = buffer.toString().toUpperCase();
				buffer.setLength(0);
				if (text.length() < 3)
					throw new IllegalArgumentException();
				if (parse(text, WEEKDAYS) != -1) {
				} else if (month == -1 && (month = parse(text, MONTHS)) != -1) {
				} else if (text.equals("GMT")) {
				} else
					throw new IllegalArgumentException();
			}

			if (nextState == LETTERS || nextState == NUMBERS)
				buffer.append(next);
			state = nextState;
		}

		if (year != -1 && month != -1 && date != -1) {
			if (hour == -1)
				hour = 0;
			if (minute == -1)
				minute = 0;
			if (second == -1)
				second = 0;
			Calendar cal = Calendar.getInstance(TimeZone.getTimeZone("GMT"));
			int current = cal.get(Calendar.YEAR) - 80;
			if (year < 100) {
				year += current / 100 * 100;
				if (year < current)
					year += 100;
			}
			cal.set(Calendar.YEAR, year);
			cal.set(Calendar.MONTH, month);
			cal.set(Calendar.DATE, date);
			cal.set(Calendar.HOUR_OF_DAY, hour);
			cal.set(Calendar.MINUTE, minute);
			cal.set(Calendar.SECOND, second);
			cal.set(Calendar.MILLISECOND, 0);
			return cal.getTime().getTime();
		}
		throw new IllegalArgumentException();
	}