# Uses of Package
org.apache.lucene.facet.taxonomy

Packages that use org.apache.lucene.facet.taxonomy
Package
Description
org.apache.lucene.facet
Faceted search.
org.apache.lucene.facet.taxonomy
Taxonomy of Categories.
org.apache.lucene.facet.taxonomy.directory
Taxonomy index implementation using on top of a Directory.
org.apache.lucene.facet.taxonomy.writercache
Improves indexing time by caching a map of CategoryPath to their Ordinal.

Classes in org.apache.lucene.facet.taxonomy used by org.apache.lucene.facet
Class
Description
TaxonomyReader
TaxonomyReader is the read-only interface with which the faceted-search library uses the taxonomy during search time.
TaxonomyWriter
TaxonomyWriter is the interface which the faceted-search library uses to dynamically build the taxonomy at indexing time.
Classes in org.apache.lucene.facet.taxonomy used by org.apache.lucene.facet.taxonomy
Class
Description
AssociationAggregationFunction
Specify aggregation logic used in `TaxonomyFacetIntAssociations` and `TaxonomyFacetFloatAssociations`.
AssociationFacetField
Add an instance of this to your `Document` to add a facet label associated with an arbitrary byte[].
FacetLabel
Holds a sequence of string components, specifying the hierarchical name of a category.
LRUHashMap
LRUHashMap is an extension of Java's HashMap, which has a bounded size(); When it reaches that size, each time a new element is added, the least recently used (LRU) entry is removed.
ParallelTaxonomyArrays
Returns 3 arrays for traversing the taxonomy: `parents`: `parents[i]` denotes the parent of category ordinal `i`.
ParallelTaxonomyArrays.IntArray
Abstraction that looks like an int[], but read-only.
SearcherTaxonomyManager.SearcherAndTaxonomy
Holds a matched pair of `IndexSearcher` and `TaxonomyReader`
TaxonomyFacetLabels.FacetLabelReader
Utility class to retrieve facet labels for multiple documents.
TaxonomyReader
TaxonomyReader is the read-only interface with which the faceted-search library uses the taxonomy during search time.
TaxonomyReader.ChildrenIterator
An iterator over a category's children.
Classes in org.apache.lucene.facet.taxonomy used by org.apache.lucene.facet.taxonomy.directory
Class
Description
FacetLabel
Holds a sequence of string components, specifying the hierarchical name of a category.
ParallelTaxonomyArrays
Returns 3 arrays for traversing the taxonomy: `parents`: `parents[i]` denotes the parent of category ordinal `i`.
TaxonomyReader
TaxonomyReader is the read-only interface with which the faceted-search library uses the taxonomy during search time.
TaxonomyWriter
TaxonomyWriter is the interface which the faceted-search library uses to dynamically build the taxonomy at indexing time.
Classes in org.apache.lucene.facet.taxonomy used by org.apache.lucene.facet.taxonomy.writercache
Class
Description
FacetLabel
Holds a sequence of string components, specifying the hierarchical name of a category.