protected int getBucketIdx(TextPair key) {
String first = key.getFirst().toString(), second = key.getSecond().toString();
if (first.length() > 0 && second.length() > 0) return 0;
return (first.length() > 0) ? 1 : 2;
}
protected int getAssignedPartition(TextPair key, int bucketIdx) {
int size = bucketSize[bucketIdx];
return bucketOffst[bucketIdx]
+ ((key.getFirst().hashCode() % size) + (key.getSecond().hashCode() % size)) % size;
}