# Package org.apache.lucene.facet.taxonomy.writercache

package org.apache.lucene.facet.taxonomy.writercache
Improves indexing time by caching a map of CategoryPath to their Ordinal.

- Related Packages
  Package
  Description
  org.apache.lucene.facet.taxonomy
  Taxonomy of Categories.
  org.apache.lucene.facet.taxonomy.directory
  Taxonomy index implementation using on top of a Directory.
- Class
  Description
  LabelToOrdinal
  Abstract class for storing Label->Ordinal mappings in a taxonomy.
  LruTaxonomyWriterCache
  LRU `TaxonomyWriterCache` - good choice for huge taxonomies.
  LruTaxonomyWriterCache.LRUType
  Determines cache type.
  NameHashIntCacheLRU
  An LRU cache of mapping from name to int.
  TaxonomyWriterCache
  TaxonomyWriterCache is a relatively simple interface for a cache of category->ordinal mappings, used in TaxonomyWriter implementations (such as `DirectoryTaxonomyWriter`).