@Test
public void testRoundtrip() {
Estimator estimator = getEstimator();
for (int i = 0; i < estimator.getNumberOfBuckets(); i++) {
estimator.setIfGreater(i, i % 16);
}
DenseEstimator other = new DenseEstimator(estimator.buckets());
assertEquals(estimator.buckets(), other.buckets());
}
/** @return true if the estimation was affected by this addition */
public boolean add(long value) {
BucketAndHash bucketAndHash = fromHash(computeHash(value), estimator.getNumberOfBuckets());
int lowestBitPosition = Long.numberOfTrailingZeros(bucketAndHash.getHash()) + 1;
if (estimator.getClass() == SparseEstimator.class
&& (estimator.estimateSizeInBytes()
>= DenseEstimator.estimateSizeInBytes(estimator.getNumberOfBuckets())
|| lowestBitPosition >= SparseEstimator.MAX_BUCKET_VALUE)) {
estimator = new DenseEstimator(estimator.buckets());
}
return estimator.setIfGreater(bucketAndHash.getBucket(), lowestBitPosition);
}
public int[] buckets() {
return estimator.buckets();
}