public override RandomAccessDocIdSet GetRandomAccessDocIdSet(BoboIndexReader reader)
{
FacetDataCache dataCache = _facetHandler.GetFacetData <FacetDataCache>(reader);
int[] indexes = FacetDataCache.Convert(dataCache, _vals);
int bits;
bits = 0x0;
foreach (int i in indexes)
{
bits |= 0x00000001 << (i - 1);
}
int finalBits = bits;
BigSegmentedArray orderArray = dataCache.OrderArray;
if (indexes.Length == 0)
{
return(EmptyDocIdSet.Instance);
}
else
{
return(new CompactMultiValueFacetFilterDocIdSet(dataCache, indexes, finalBits, orderArray));
}
}
public override double GetFacetSelectivity(BoboIndexReader reader)
{
double selectivity = 0;
FacetDataCache dataCache = _facetHandler.GetFacetData <FacetDataCache>(reader);
int[] idxes = FacetDataCache.Convert(dataCache, _vals);
if (idxes == null)
{
return(0.0);
}
int accumFreq = 0;
foreach (int idx in idxes)
{
accumFreq += dataCache.Freqs[idx];
}
int total = reader.MaxDoc;
selectivity = (double)accumFreq / (double)total;
if (selectivity > 0.999)
{
selectivity = 1.0;
}
return(selectivity);
}
public int[] Convert(FacetDataCache dataCache, string[] vals)
{
return(FacetDataCache.Convert(dataCache, vals));
}