public static TimePeriod from()

in lang/java/avro/src/main/java/org/apache/avro/util/TimePeriod.java [125:202]
78 lines of code
23 McCabe index (conditional complexity)

  public static TimePeriod from(TemporalAmount amount) {
    if (requireNonNull(amount, "amount") instanceof TimePeriod) {
      return (TimePeriod) amount;
    }
    if (amount instanceof ChronoPeriod) {
      if (!IsoChronology.INSTANCE.equals(((ChronoPeriod) amount).getChronology())) {
        throw new DateTimeException("TimePeriod requires ISO chronology: " + amount);
      }
    }
    long months = 0;
    long days = 0;
    long millis = 0;
    for (TemporalUnit unit : amount.getUnits()) {
      if (unit instanceof ChronoUnit) {
        long unitAmount = amount.get(unit);
        switch ((ChronoUnit) unit) {
        case MILLENNIA:
          months = unsignedInt(months + unitAmount * MONTHS_PER_MILLENNIUM);
          break;
        case CENTURIES:
          months = unsignedInt(months + unitAmount * MONTHS_PER_CENTURY);
          break;
        case DECADES:
          months = unsignedInt(months + unitAmount * MONTHS_PER_DECADE);
          break;
        case YEARS:
          months = unsignedInt(months + unitAmount * MONTHS_PER_YEAR);
          break;
        case MONTHS:
          months = unsignedInt(months + unitAmount);
          break;
        case WEEKS:
          days = unsignedInt(days + unitAmount * 7);
          break;
        case DAYS:
          days = unsignedInt(days + unitAmount);
          break;
        case HALF_DAYS:
          days = unsignedInt(days + (unitAmount / 2)); // Truncates halves
          if (unitAmount % 2 != 0) {
            millis = unsignedInt(millis + MILLIS_IN_HALF_DAY);
          }
          break;
        case HOURS:
          millis = unsignedInt(millis + unitAmount * MILLIS_PER_HOUR);
          break;
        case MINUTES:
          millis = unsignedInt(millis + unitAmount * MILLIS_PER_MINUTE);
          break;
        case SECONDS:
          millis = unsignedInt(millis + unitAmount * MILLIS_PER_SECOND);
          break;
        case MILLIS:
          millis = unsignedInt(millis + unitAmount);
          break;
        case MICROS:
          if (unitAmount % MICROS_PER_MILLI != 0) {
            throw new DateTimeException(
                "Cannot add " + unitAmount + " microseconds: not a whole number of milliseconds");
          }
          millis = unsignedInt(millis + unitAmount / MICROS_PER_MILLI);
          break;
        case NANOS:
          if (unitAmount % NANOS_PER_MILLI != 0) {
            throw new DateTimeException(
                "Cannot add " + unitAmount + " nanoseconds: not a whole number of milliseconds");
          }
          millis = unsignedInt(millis + unitAmount / NANOS_PER_MILLI);
          break;
        default:
          throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit);
        }
      } else {
        throw new UnsupportedTemporalTypeException("Unsupported unit: " + unit);
      }
    }
    return new TimePeriod(months, days, millis);
  }