public virtual void TestPathToStringAndBack()
{
int iters = AtLeast(1000);
for (int i = 0; i < iters; i++)
{
int numParts = TestUtil.NextInt32(Random, 1, 6);
string[] parts = new string[numParts];
for (int j = 0; j < numParts; j++)
{
string s;
while (true)
{
s = TestUtil.RandomUnicodeString(Random);
if (s.Length > 0)
{
break;
}
}
parts[j] = s;
}
string s1 = FacetsConfig.PathToString(parts);
string[] parts2 = FacetsConfig.StringToPath(s1);
Assert.True(Arrays.Equals(parts, parts2));
}
}
/// <summary>
/// Note: if you use a counting <see cref="Facets"/> implementation, you can amortize the
/// sampled counts by calling this method. Uses the <see cref="FacetsConfig"/> and
/// the <see cref="IndexSearcher"/> to determine the upper bound for each facet value.
/// </summary>
public virtual FacetResult AmortizeFacetCounts(FacetResult res, FacetsConfig config, IndexSearcher searcher)
{
if (res == null || totalHits <= sampleSize)
{
return(res);
}
LabelAndValue[] fixedLabelValues = new LabelAndValue[res.LabelValues.Length];
IndexReader reader = searcher.IndexReader;
DimConfig dimConfig = config.GetDimConfig(res.Dim);
// +2 to prepend dimension, append child label
string[] childPath = new string[res.Path.Length + 2];
childPath[0] = res.Dim;
Array.Copy(res.Path, 0, childPath, 1, res.Path.Length); // reuse
for (int i = 0; i < res.LabelValues.Length; i++)
{
childPath[res.Path.Length + 1] = res.LabelValues[i].Label;
string fullPath = FacetsConfig.PathToString(childPath, childPath.Length);
int max = reader.DocFreq(new Term(dimConfig.IndexFieldName, fullPath));
int correctedCount = (int)((double)res.LabelValues[i].Value / samplingRate);
correctedCount = Math.Min(max, correctedCount);
fixedLabelValues[i] = new LabelAndValue(res.LabelValues[i].Label, correctedCount);
}
// cap the total count on the total number of non-deleted documents in the reader
int correctedTotalCount = (int)res.Value;
if (correctedTotalCount > 0)
{
correctedTotalCount = Math.Min(reader.NumDocs, (int)((double)res.Value / samplingRate));
}
return(new FacetResult(res.Dim, res.Path, correctedTotalCount, fixedLabelValues, res.ChildCount));
}
/// <summary>
/// Creates a drill-down term.
/// </summary>
public static Term Term(string field, string dim, params string[] path)
{
return(new Term(field, FacetsConfig.PathToString(dim, path)));
}