Package org.apache.lucene.codecs.blockterms

Pluggable term index / block terms dictionary implementations.

Class Summary

Class	Description
BlockTermsReader	Handles a terms dict, but decouples all details of doc/freqs/positions reading to an instance of PostingsReaderBase.
BlockTermsWriter	Writes terms dict, block-encoding (column stride) each term's metadata for each set of terms between two index terms.
FixedGapTermsIndexReader	TermsIndexReader for simple every Nth terms indexes.
FixedGapTermsIndexWriter	Selects every Nth term as and index term, and hold term bytes (mostly) fully expanded in memory.
TermsIndexReaderBase	BlockTermsReader interacts with an instance of this class to manage its terms index.
TermsIndexReaderBase.FieldIndexEnum	Similar to TermsEnum, except, the only "metadata" it reports for a given indexed term is the long fileOffset into the main terms dictionary file.
TermsIndexWriterBase	Base class for terms index implementations to plug into BlockTermsWriter.
VariableGapTermsIndexReader	See VariableGapTermsIndexWriter
VariableGapTermsIndexWriter	Selects index terms according to provided pluggable VariableGapTermsIndexWriter.IndexTermSelector, and stores them in a prefix trie that's loaded entirely in RAM stored as an FST.
VariableGapTermsIndexWriter.EveryNOrDocFreqTermSelector	Sets an index term when docFreq >= docFreqThresh, or every interval terms.
VariableGapTermsIndexWriter.EveryNTermSelector	Same policy as FixedGapTermsIndexWriter
VariableGapTermsIndexWriter.IndexTermSelector	Hook for selecting which terms should be placed in the terms index.