/** {@inheritDoc} */
public long nextSecureLong(final long lower, final long upper) throws NumberIsTooLargeException {
if (lower >= upper) {
throw new NumberIsTooLargeException(
LocalizedFormats.LOWER_BOUND_NOT_BELOW_UPPER_BOUND, lower, upper, false);
}
final RandomGenerator rng = getSecRan();
final long max = (upper - lower) + 1;
if (max <= 0) {
// the range is too wide to fit in a positive long (larger than 2^63); as it covers
// more than half the long range, we use directly a simple rejection method
while (true) {
final long r = rng.nextLong();
if (r >= lower && r <= upper) {
return r;
}
}
} else if (max < Integer.MAX_VALUE) {
// we can shift the range and generate directly a positive int
return lower + rng.nextInt((int) max);
} else {
// we can shift the range and generate directly a positive long
return lower + nextLong(rng, max);
}
}
