## Uses of Class
org.apache.lucene.facet.taxonomy.OrdinalsReader

- Packages that use OrdinalsReader
  Package | Description
  --- | ---
  org.apache.lucene.facet.taxonomy | Taxonomy of Categories.

- - ### Uses of OrdinalsReader in org.apache.lucene.facet.taxonomy

    Subclasses of OrdinalsReader in org.apache.lucene.facet.taxonomy
    Modifier and Type | Class and Description
    --- | ---
    `class` | `CachedOrdinalsReader` A per-segment cache of documents' facet ordinals.
    `class` | `DocValuesOrdinalsReader` Decodes ordinals previously indexed into a BinaryDocValues field

    Methods in org.apache.lucene.facet.taxonomy that return OrdinalsReader
    Modifier and Type | Method and Description
    --- | ---
    `protected OrdinalsReader` | OrdinalMappingLeafReader.`getOrdinalsReader(String field)` Expert: override in case you used custom encoding for the categories under this field.

    Constructors in org.apache.lucene.facet.taxonomy with parameters of type OrdinalsReader
    Constructor and Description
    `CachedOrdinalsReader(OrdinalsReader source)` Sole constructor.
    `FacetLabelReader(OrdinalsReader ordsReader, LeafReaderContext readerContext)` Sole constructor.
    `TaxonomyFacetCounts(OrdinalsReader ordinalsReader, TaxonomyReader taxoReader, FacetsConfig config, FacetsCollector fc)` Create `TaxonomyFacetCounts`, which also counts all facet labels.
    `TaxonomyFacetSumValueSource(OrdinalsReader ordinalsReader, TaxonomyReader taxoReader, FacetsConfig config, FacetsCollector fc, DoubleValuesSource vs)` Aggreggates float facet values from the provided `DoubleValuesSource`, and pulls ordinals from the provided `OrdinalsReader`.

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