DateTimeUtils.java 文件源码

@Override
public int parseInto(ReadWritablePeriod period, String text, int position, Locale locale)
{
    int bestValidPos = position;
    ReadWritablePeriod bestValidPeriod = null;

    int bestInvalidPos = position;

    for (PeriodParser parser : parsers) {
        ReadWritablePeriod parsedPeriod = new MutablePeriod();
        int parsePos = parser.parseInto(parsedPeriod, text, position, locale);
        if (parsePos >= position) {
            if (parsePos > bestValidPos) {
                bestValidPos = parsePos;
                bestValidPeriod = parsedPeriod;
                if (parsePos >= text.length()) {
                    break;
                }
            }
        }
        else if (parsePos < 0) {
            parsePos = ~parsePos;
            if (parsePos > bestInvalidPos) {
                bestInvalidPos = parsePos;
            }
        }
    }

    if (bestValidPos > position || (bestValidPos == position)) {
        // Restore the state to the best valid parse.
        if (bestValidPeriod != null) {
            period.setPeriod(bestValidPeriod);
        }
        return bestValidPos;
    }

    return ~bestInvalidPos;
}