/// <summary>User runs a query and aggregates facets by summing their association values.</summary>
private IList <FacetResult> SumAssociations()
{
using DirectoryReader indexReader = DirectoryReader.Open(indexDir);
using TaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoDir);
IndexSearcher searcher = new IndexSearcher(indexReader);
FacetsCollector fc = new FacetsCollector();
// MatchAllDocsQuery is for "browsing" (counts facets
// for all non-deleted docs in the index); normally
// you'd use a "normal" query:
FacetsCollector.Search(searcher, new MatchAllDocsQuery(), 10, fc);
Facets tags = new TaxonomyFacetSumInt32Associations("$tags", taxoReader, config, fc);
Facets genre = new TaxonomyFacetSumSingleAssociations("$genre", taxoReader, config, fc);
// Retrieve results
IList <FacetResult> results = new List <FacetResult>
{
tags.GetTopChildren(10, "tags"),
genre.GetTopChildren(10, "genre")
};
return(results);
}
/// <summary>User drills down on 'tags/solr'.</summary>
private FacetResult DrillDown()
{
using DirectoryReader indexReader = DirectoryReader.Open(indexDir);
using TaxonomyReader taxoReader = new DirectoryTaxonomyReader(taxoDir);
IndexSearcher searcher = new IndexSearcher(indexReader);
// Passing no baseQuery means we drill down on all
// documents ("browse only"):
DrillDownQuery q = new DrillDownQuery(config);
// Now user drills down on Publish Date/2010:
q.Add("tags", "solr");
FacetsCollector fc = new FacetsCollector();
FacetsCollector.Search(searcher, q, 10, fc);
// Retrieve results
Facets facets = new TaxonomyFacetSumSingleAssociations("$genre", taxoReader, config, fc);
FacetResult result = facets.GetTopChildren(10, "genre");
return(result);
}