Method withValue

base/src/main/java/net/time4j/Moment.java:3293–3339

(
            Moment context,
            TimeUnit value,
            boolean lenient
        )

        }

        @Override
        public Moment withValue(
            Moment context,
            TimeUnit value,
            boolean lenient
        ) {

            if (value == null) {
                throw new IllegalArgumentException("Missing precision.");
            }

            Moment result;

            switch (value) {
                case DAYS:
                    long secsD = Math.floorDiv(context.posixTime, 86400) * 86400;
                    return Moment.of(secsD, TimeScale.POSIX);
                case HOURS:
                    long secsH = Math.floorDiv(context.posixTime, 3600) * 3600;
                    return Moment.of(secsH, TimeScale.POSIX);
                case MINUTES:
                    long secsM = Math.floorDiv(context.posixTime, 60) * 60;
                    return Moment.of(secsM, TimeScale.POSIX);
                case SECONDS:
                    result = Moment.of(context.posixTime, 0, TimeScale.POSIX);
                    break;
                case MILLISECONDS:
                    int f3 = (context.getNanosecond() / MIO) * MIO;
                    result = Moment.of(context.posixTime, f3, TimeScale.POSIX);
                    break;
                case MICROSECONDS:
                    int f6 = (context.getNanosecond() / 1000) * 1000;
                    result = Moment.of(context.posixTime, f6, TimeScale.POSIX);
                    break;
                case NANOSECONDS:
                    return context;
                default:
                    throw new UnsupportedOperationException(value.name());
            }

            if (context.isLeapSecond() && LeapSeconds.getInstance().isEnabled()) {
                return result.plus(1, SI.SECONDS);
            } else {
                return result;
            }

        }

        @Override
        public boolean isValid(