internal void Calculate()
{
if (_QueryDocidSet == DocIdBitSet.EMPTY_DOCIDSET)
{
_ResultBitSet = new OpenBitSet(0);
}
else
{
_ResultBitSet = (OpenBitSet)((OpenBitSet)_QueryDocidSet).Clone();
_ResultBitSet.And(_GroupBitSet);
}
_ResultIterator = _ResultBitSet.Iterator();
_HitCount = _ResultBitSet.Cardinality();
_ResultBitSet = null;
_QueryDocidSet = null;
_GroupBitSet = null;
}