Class MachineTime

base/src/main/java/net/time4j/MachineTime.java:95–1841

 * @see     SI#NANOSECONDS
 */
public final class MachineTime<U>
    implements TimeSpan<U>, Comparable<MachineTime<U>>, Serializable {

    //~ Statische Felder/Initialisierungen --------------------------------

    private static final int MRD = 1000000000;

    private static final MachineTime<TimeUnit> POSIX_ZERO = new MachineTime<>(0, 0, POSIX);
    private static final MachineTime<SI> UTC_ZERO = new MachineTime<>(0, 0, UTC);

    /**
     * Reversible metric on the POSIX scale (without leap seconds).
     *
     * @since   2.0
     */
    /*[deutsch]
     * Umkehrbare Metrik auf der POSIX-Skala (ohne Schaltsekunden).
     *
     * @since   2.0
     */
    public static final TimeMetric<TimeUnit, MachineTime<TimeUnit>> ON_POSIX_SCALE = new Metric<>(POSIX);

    /**
     * <p>Reversible metric on the UTC scale (inclusive leap seconds). </p>
     * 
     * <p>Time points before 1972 are not supported. </p>
     *
     * @since   2.0
     */
    /*[deutsch]
     * <p>Umkehrbare Metrik auf der UTC-Skala (inklusive Schaltsekunden). </p>
     *
     * <p>Zeitpunkte vor 1972 werden nicht unterst&uuml;tzt. </p>
     *
     * @since   2.0
     */
    public static final TimeMetric<TimeUnit, MachineTime<SI>> ON_UTC_SCALE = new Metric<>(UTC);

    private static final long serialVersionUID = -4150291820807606229L;

    //~ Instanzvariablen --------------------------------------------------

    private transient final long seconds;
    private transient final int nanos;
    private transient final TimeScale scale;

    //~ Konstruktoren -----------------------------------------------------

    private MachineTime(
        long secs,
        int fraction,
        TimeScale scale
    ) {
        super();

        while (fraction < 0) {
            fraction += MRD;
            secs = Math.subtractExact(secs, 1);