Method readHour

base/src/main/java/net/time4j/PlainTime.java:3493–3533

(ChronoEntity<?> entity)

        // read to digital hour 0-23 (or -1 / -2 in case of zero clock hour)
        private static int readHour(ChronoEntity<?> entity) {

            int hour = entity.getInt(DIGITAL_HOUR_OF_DAY);

            if (hour != Integer.MIN_VALUE) {
                return hour;
            }

            hour = entity.getInt(CLOCK_HOUR_OF_DAY);

            if (hour == 0) {
                return -1; // flag for wrong zero clock hour
            } else if (hour == 24) {
                return 0;
            } else if (hour != Integer.MIN_VALUE) {
                return hour;
            }

            if (entity.contains(AM_PM_OF_DAY)) {
                Meridiem ampm = entity.get(AM_PM_OF_DAY);
                int h = entity.getInt(CLOCK_HOUR_OF_AMPM);

                if (h != Integer.MIN_VALUE) {
                    if (h == 0) {
                        return ((ampm == Meridiem.AM) ? -1 : -2); // flag for wrong zero clock hour
                    } else if (h == 12) {
                        h = 0;
                    }
                    return ((ampm == Meridiem.AM) ? h : h + 12);
                }

                h = entity.getInt(DIGITAL_HOUR_OF_AMPM);

                if (h != Integer.MIN_VALUE) {
                    return ((ampm == Meridiem.AM) ? h : h + 12);
                }
            }

            return Integer.MIN_VALUE;

        }

        private static PlainTime readSpecialCases(ChronoEntity<?> entity) {