private long truncateCompoundPeriod(long t) {
long current;
if (t >= origin) {
long next = origin;
do {
current = next;
next = chronology.add(period, current, 1);
} while (t >= next);
} else {
current = origin;
do {
current = chronology.add(period, current, -1);
} while (t < current);
}
return current;
}
@Override
public long next(long t) {
return chronology.add(period, t, 1);
}