# Package org.apache.lucene.analysis.miscellaneous

Miscellaneous Tokenstreams.

See: Description

- Class Summary
  Class | Description
  --- | ---
  ASCIIFoldingFilter | This class converts alphabetic, numeric, and symbolic Unicode characters which are not in the first 127 ASCII characters (the "Basic Latin" Unicode block) into their ASCII equivalents, if one exists.
  ASCIIFoldingFilterFactory | Factory for `ASCIIFoldingFilter`.
  CapitalizationFilter | A filter to apply normal capitalization rules to Tokens.
  CapitalizationFilterFactory | Factory for `CapitalizationFilter`.
  CodepointCountFilter | Removes words that are too long or too short from the stream.
  CodepointCountFilterFactory | Factory for `CodepointCountFilter`.
  DateRecognizerFilter | Filters all tokens that cannot be parsed to a date, using the provided `DateFormat`.
  DateRecognizerFilterFactory | Factory for `DateRecognizerFilter`.
  EmptyTokenStream | An always exhausted token stream.
  FingerprintFilter | Filter outputs a single token which is a concatenation of the sorted and de-duplicated set of input tokens.
  FingerprintFilterFactory | Factory for `FingerprintFilter`.
  HyphenatedWordsFilter | When the plain text is extracted from documents, we will often have many words hyphenated and broken into two lines.
  HyphenatedWordsFilterFactory | Factory for `HyphenatedWordsFilter`.
  KeepWordFilter | A TokenFilter that only keeps tokens with text contained in the required words.
  KeepWordFilterFactory | Factory for `KeepWordFilter`.
  KeywordMarkerFilter | Marks terms as keywords via the `KeywordAttribute`.
  KeywordMarkerFilterFactory | Factory for `KeywordMarkerFilter`.
  KeywordRepeatFilter | This TokenFilter emits each incoming token twice once as keyword and once non-keyword, in other words once with `KeywordAttribute.setKeyword(boolean)` set to `true` and once set to `false`.
  KeywordRepeatFilterFactory | Factory for `KeywordRepeatFilter`.
  LengthFilter | Removes words that are too long or too short from the stream.
  LengthFilterFactory | Factory for `LengthFilter`.
  LimitTokenCountAnalyzer | This Analyzer limits the number of tokens while indexing.
  LimitTokenCountFilter | This TokenFilter limits the number of tokens while indexing.
  LimitTokenCountFilterFactory | Factory for `LimitTokenCountFilter`.
  LimitTokenOffsetFilter | Lets all tokens pass through until it sees one with a start offset <= a configured limit, which won't pass and ends the stream.
  LimitTokenOffsetFilterFactory | Factory for `LimitTokenOffsetFilter`.
  LimitTokenPositionFilter | This TokenFilter limits its emitted tokens to those with positions that are not greater than the configured limit.
  LimitTokenPositionFilterFactory | Factory for `LimitTokenPositionFilter`.
  PatternKeywordMarkerFilter | Marks terms as keywords via the `KeywordAttribute`.
  PerFieldAnalyzerWrapper | This analyzer is used to facilitate scenarios where different fields require different analysis techniques.
  PrefixAndSuffixAwareTokenFilter | Links two `PrefixAwareTokenFilter`.
  PrefixAwareTokenFilter | Joins two token streams and leaves the last token of the first stream available to be used when updating the token values in the second stream based on that token.
  RemoveDuplicatesTokenFilter | A TokenFilter which filters out Tokens at the same position and Term text as the previous token in the stream.
  RemoveDuplicatesTokenFilterFactory | Factory for `RemoveDuplicatesTokenFilter`.
  ScandinavianFoldingFilter | This filter folds Scandinavian characters åÅäæÄÆ->a and öÖøØ->o.
  ScandinavianFoldingFilterFactory | Factory for `ScandinavianFoldingFilter`.
  ScandinavianNormalizationFilter | This filter normalize use of the interchangeable Scandinavian characters æÆäÄöÖøØ and folded variants (aa, ao, ae, oe and oo) by transforming them to åÅæÆøØ.
  ScandinavianNormalizationFilterFactory | Factory for `ScandinavianNormalizationFilter`.
  SetKeywordMarkerFilter | Marks terms as keywords via the `KeywordAttribute`.
  StemmerOverrideFilter | Provides the ability to override any `KeywordAttribute` aware stemmer with custom dictionary-based stemming.
  StemmerOverrideFilter.Builder | This builder builds an `FST` for the `StemmerOverrideFilter`
  StemmerOverrideFilter.StemmerOverrideMap | A read-only 4-byte FST backed map that allows fast case-insensitive key value lookups for `StemmerOverrideFilter`
  StemmerOverrideFilterFactory | Factory for `StemmerOverrideFilter`.
  TrimFilter | Trims leading and trailing whitespace from Tokens in the stream.
  TrimFilterFactory | Factory for `TrimFilter`.
  TruncateTokenFilter | A token filter for truncating the terms into a specific length.
  TruncateTokenFilterFactory | Factory for `TruncateTokenFilter`.
  WordDelimiterFilter | Deprecated Use `WordDelimiterGraphFilter` instead: it produces a correct token graph so that e.g.
  WordDelimiterFilterFactory | Deprecated Use `WordDelimiterGraphFilterFactory` instead: it produces a correct token graph so that e.g.
  WordDelimiterGraphFilter | Splits words into subwords and performs optional transformations on subword groups, producing a correct token graph so that e.g.
  WordDelimiterGraphFilterFactory | Factory for `WordDelimiterGraphFilter`.
  WordDelimiterIterator | A BreakIterator-like API for iterating over subwords in text, according to WordDelimiterGraphFilter rules.

## Package org.apache.lucene.analysis.miscellaneous Description

Miscellaneous Tokenstreams.

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