Class JapaneseKatakanaStemFilter

A TokenFilter that normalizes common katakana spelling variations ending in a long sound character by removing this character (U+30FC). Only katakana words longer than a minimum length are stemmed (default is four).

Inheritance
System.Object
AttributeSource
TokenStream
TokenFilter
JapaneseKatakanaStemFilter
Implements
IDisposable
Inherited Members
Namespace: Lucene.Net.Analysis.Ja
Assembly: Lucene.Net.Analysis.Kuromoji.dll
Syntax
public sealed class JapaneseKatakanaStemFilter : TokenFilter, IDisposable
Remarks

Note that only full-width katakana characters are supported. Please use a CJKWidthFilter to convert half-width katakana to full-width before using this filter.

In order to prevent terms from being stemmed, use an instance of SetKeywordMarkerFilter or a custom TokenFilter that sets the IKeywordAttribute before this TokenStream.

Constructors

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JapaneseKatakanaStemFilter(TokenStream)

Declaration
public JapaneseKatakanaStemFilter(TokenStream input)
Parameters
Type Name Description
TokenStream input
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JapaneseKatakanaStemFilter(TokenStream, Int32)

Declaration
public JapaneseKatakanaStemFilter(TokenStream input, int minimumLength)
Parameters
Type Name Description
TokenStream input
System.Int32 minimumLength

Fields

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DEFAULT_MINIMUM_LENGTH

Declaration
public static readonly int DEFAULT_MINIMUM_LENGTH
Field Value
Type Description
System.Int32

Methods

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IncrementToken()

Declaration
public override bool IncrementToken()
Returns
Type Description
System.Boolean
Overrides

Implements

IDisposable