Examples of java.time.temporal.ValueRange

java.time.temporal.ValueRange
The range of valid values for a date-time field.
All {@link TemporalField} instances have a valid range of values.For example, the ISO day-of-month runs from 1 to somewhere between 28 and 31. This class captures that valid range.
It is important to be aware of the limitations of this class. Only the minimum and maximum values are provided. It is possible for there to be invalid values within the outer range. For example, a weird field may have valid values of 1, 2, 4, 6, 7, thus have a range of '1 - 7', despite that fact that values 3 and 5 are invalid.
Instances of this class are not tied to a specific field. @implSpec This class is immutable and thread-safe. @since 1.8

         * @param fraction  the fraction to convert, not null
         * @return the value of the field, valid for this rule
         * @throws DateTimeException if the value cannot be converted
         */
        private long convertFromFraction(BigDecimal fraction) {
            ValueRange range = field.range();
            BigDecimal minBD = BigDecimal.valueOf(range.getMinimum());
            BigDecimal rangeBD = BigDecimal.valueOf(range.getMaximum()).subtract(minBD).add(BigDecimal.ONE);
            BigDecimal valueBD = fraction.multiply(rangeBD).setScale(0, RoundingMode.FLOOR).add(minBD);
            return valueBD.longValueExact();
        }

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    //-----------------------------------------------------------------------
    @Override
    public ValueRange range(ChronoField field) {
        switch (field) {
            case PROLEPTIC_MONTH: {
                ValueRange range = PROLEPTIC_MONTH.range();
                return ValueRange.of(range.getMinimum() + YEARS_DIFFERENCE * 12L, range.getMaximum() + YEARS_DIFFERENCE * 12L);
            }
            case YEAR_OF_ERA: {
                ValueRange range = YEAR.range();
                return ValueRange.of(1, -(range.getMinimum() + YEARS_DIFFERENCE) + 1, range.getMaximum() + YEARS_DIFFERENCE);
            }
            case YEAR: {
                ValueRange range = YEAR.range();
                return ValueRange.of(range.getMinimum() + YEARS_DIFFERENCE, range.getMaximum() + YEARS_DIFFERENCE);
            }
        }
        return field.range();
    }

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                    case DAY_OF_MONTH:
                    case DAY_OF_YEAR:
                    case ALIGNED_WEEK_OF_MONTH:
                        return isoDate.range(field);
                    case YEAR_OF_ERA: {
                        ValueRange range = YEAR.range();
                        long max = (getProlepticYear() <= 0 ? -range.getMinimum() + 1 + YEARS_DIFFERENCE : range.getMaximum() - YEARS_DIFFERENCE);
                        return ValueRange.of(1, max);
                    }
                }
                return getChronology().range(f);
            }

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                    case DAY_OF_MONTH:
                    case DAY_OF_YEAR:
                    case ALIGNED_WEEK_OF_MONTH:
                        return isoDate.range(field);
                    case YEAR_OF_ERA: {
                        ValueRange range = YEAR.range();
                        long max = (getProlepticYear() <= 0 ? -(range.getMinimum() + YEARS_DIFFERENCE) + 1 : range.getMaximum() + YEARS_DIFFERENCE);
                        return ValueRange.of(1, max);
                    }
                }
                return getChronology().range(f);
            }

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    private long daysUntil(ChronoLocalDate end) {
        return end.toEpochDay() - toEpochDay();  // no overflow
    }


    private long monthsUntil(ChronoLocalDate end) {
        ValueRange range = getChronology().range(MONTH_OF_YEAR);
        if (range.getMaximum() != 12) {
            throw new IllegalStateException("ChronoLocalDateImpl only supports Chronologies with 12 months per year");
        }
        long packed1 = getLong(PROLEPTIC_MONTH) * 32L + get(DAY_OF_MONTH);  // no overflow
        long packed2 = end.getLong(PROLEPTIC_MONTH) * 32L + end.get(DAY_OF_MONTH);  // no overflow
        return (packed2 - packed1) / 32;

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     * Calculates the range of months.
     *
     * @return the month range, -1 if not fixed range
     */
    private long monthRange() {
        ValueRange startRange = chrono.range(MONTH_OF_YEAR);
        if (startRange.isFixed() && startRange.isIntValue()) {
            return startRange.getMaximum() - startRange.getMinimum() + 1;
        }
        return -1;
    }

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    //-----------------------------------------------------------------------
    @Override
    public ValueRange range(ChronoField field) {
        switch (field) {
            case PROLEPTIC_MONTH: {
                ValueRange range = PROLEPTIC_MONTH.range();
                return ValueRange.of(range.getMinimum() - YEARS_DIFFERENCE * 12L, range.getMaximum() - YEARS_DIFFERENCE * 12L);
            }
            case YEAR_OF_ERA: {
                ValueRange range = YEAR.range();
                return ValueRange.of(1, range.getMaximum() - YEARS_DIFFERENCE, -range.getMinimum() + 1 + YEARS_DIFFERENCE);
            }
            case YEAR: {
                ValueRange range = YEAR.range();
                return ValueRange.of(range.getMinimum() - YEARS_DIFFERENCE, range.getMaximum() - YEARS_DIFFERENCE);
            }
        }
        return field.range();
    }

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            long months = Math.subtractExact(fieldValues.remove(MONTH_OF_YEAR), 1);
            long days = Math.subtractExact(fieldValues.remove(DAY_OF_MONTH), 1);
            return date(y, 1, 1).plus(months, MONTHS).plus(days, DAYS);
        }
        int moy = range(MONTH_OF_YEAR).checkValidIntValue(fieldValues.remove(MONTH_OF_YEAR), MONTH_OF_YEAR);
        ValueRange domRange = range(DAY_OF_MONTH);
        int dom = domRange.checkValidIntValue(fieldValues.remove(DAY_OF_MONTH), DAY_OF_MONTH);
        if (resolverStyle == ResolverStyle.SMART) {  // previous valid
            try {
                return date(y, moy, dom);
            } catch (DateTimeException ex) {
                return date(y, moy, 1).with(TemporalAdjusters.lastDayOfMonth());

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