@Override
public int getSegment(Object key) {
// The result must always be positive, so we make sure the dividend is positive first
return (hashFunction.hash(key) & Integer.MAX_VALUE) / segmentSize;
}
@Override
public int hashCode() {
int result = hashFunction != null ? hashFunction.hashCode() : 0;
result = 31 * result + numSegments;
return result;
}
/**
* Applies the given hash function to the hash code of a given object, and then normalizes it to
* ensure a positive value is always returned.
*
* @param object to hash
* @param hashFct hash function to apply
* @return a non-null, non-negative normalized hash code for a given object
*/
public static int getNormalizedHash(Object object, Hash hashFct) {
// make sure no negative numbers are involved.
return hashFct.hash(object) & Integer.MAX_VALUE;
}