Method parse

base/src/main/java/net/time4j/calendar/EastAsianME.java:172–274

(
        CharSequence text,
        ParsePosition status,
        AttributeQuery attributes
    )

    }

    @Override
    public EastAsianMonth parse(
        CharSequence text,
        ParsePosition status,
        AttributeQuery attributes
    ) {

        Locale loc = attributes.get(Attributes.LANGUAGE, Locale.ROOT);
        int len = text.length();
        int start = status.getIndex();

        if (start >= len) {
            status.setErrorIndex(len);
            return null;
        }

        boolean leap = false;
        EastAsianMonth eam;

        if (attributes.contains(DualFormatElement.COUNT_OF_PATTERN_SYMBOLS)) { // numeric case
            Map<String, String> textForms = CalendarText.getInstance("generic", loc).getTextForms();
            NumberSystem numsys = attributes.get(Attributes.NUMBER_SYSTEM, NumberSystem.ARABIC);
            int pos = start;
            char zeroDigit = attributes.get(Attributes.ZERO_DIGIT, numsys.getDigits().charAt(0));

            boolean trailing =
                attributes.get(EastAsianMonth.LEAP_MONTH_IS_TRAILING, "R".equals(textForms.get("leap-alignment")));
            char indicator =
                attributes.get(EastAsianMonth.LEAP_MONTH_INDICATOR, textForms.get("leap-indicator").charAt(0));

            if (!trailing && (text.charAt(pos) == indicator)) {
                pos++;
                leap = true;
            }

            if (numsys.isDecimal()) {
                // ignore possible padding
                while ((pos < len) && (text.charAt(pos) == zeroDigit)) {
                    pos++;
                }
            }

            int m = 0;

            for (int num = 12; (num >= 1) && (m == 0); num--) {
                String display = DualFormatElement.toNumeral(numsys, zeroDigit, num);
                int numlen = display.length();
                for (int i = 0; ; i++) {
                    if ((len > pos + i) && (text.charAt(pos + i) != display.charAt(i))) {
                        break;
                    } else if (i + 1 == numlen) {
                        m = num;
                        pos += numlen;
                        break;
                    }
                }
            }