org.apache.lucene.facet.taxonomy

## Class FastTaxonomyFacetCounts

- java.lang.Object
- - org.apache.lucene.facet.Facets
  - - org.apache.lucene.facet.taxonomy.TaxonomyFacets
    - - org.apache.lucene.facet.taxonomy.IntTaxonomyFacets
      - - org.apache.lucene.facet.taxonomy.FastTaxonomyFacetCounts

-     public class FastTaxonomyFacetCounts
      extends IntTaxonomyFacets

  Computes facets counts, assuming the default encoding into DocValues was used.
  WARNING: This API is experimental and might change in incompatible ways in the next release.

- - ### Field Summary

    - ### Fields inherited from class org.apache.lucene.facet.taxonomy.TaxonomyFacets

      `config, indexFieldName, parents, taxoReader`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `FastTaxonomyFacetCounts(String indexFieldName, IndexReader reader, TaxonomyReader taxoReader, FacetsConfig config)` Create `FastTaxonomyFacetCounts`, using the specified `indexFieldName` for ordinals, and counting all non-deleted documents in the index.
    `FastTaxonomyFacetCounts(String indexFieldName, TaxonomyReader taxoReader, FacetsConfig config, FacetsCollector fc)` Create `FastTaxonomyFacetCounts`, using the specified `indexFieldName` for ordinals.
    `FastTaxonomyFacetCounts(TaxonomyReader taxoReader, FacetsConfig config, FacetsCollector fc)` Create `FastTaxonomyFacetCounts`, which also counts all facet labels.

  - ### Method Summary

    - ### Methods inherited from class org.apache.lucene.facet.taxonomy.IntTaxonomyFacets

      `getSpecificValue, getTopChildren, getValue, increment, increment, rollup, useHashTable`

    - ### Methods inherited from class org.apache.lucene.facet.taxonomy.TaxonomyFacets

      `childrenLoaded, getAllDims, getChildren, getSiblings, siblingsLoaded, verifyDim`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### FastTaxonomyFacetCounts

          public FastTaxonomyFacetCounts(TaxonomyReader taxoReader,
                                         FacetsConfig config,
                                         FacetsCollector fc)
                                  throws IOException

      Create `FastTaxonomyFacetCounts`, which also counts all facet labels.
      Throws:
        `IOException`

    - #### FastTaxonomyFacetCounts

          public FastTaxonomyFacetCounts(String indexFieldName,
                                         TaxonomyReader taxoReader,
                                         FacetsConfig config,
                                         FacetsCollector fc)
                                  throws IOException

      Create `FastTaxonomyFacetCounts`, using the specified `indexFieldName` for ordinals. Use this if you had set `FacetsConfig.setIndexFieldName(java.lang.String, java.lang.String)` to change the index field name for certain dimensions.
      Throws:
        `IOException`

    - #### FastTaxonomyFacetCounts

          public FastTaxonomyFacetCounts(String indexFieldName,
                                         IndexReader reader,
                                         TaxonomyReader taxoReader,
                                         FacetsConfig config)
                                  throws IOException

      Create `FastTaxonomyFacetCounts`, using the specified `indexFieldName` for ordinals, and counting all non-deleted documents in the index. This is the same result as searching on `MatchAllDocsQuery`, but faster
      Throws:
        `IOException`

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