Class JapaneseKatakanaStemFilter

A Lucene.Net.Analysis.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
Lucene.Net.Util.AttributeSource
Lucene.Net.Analysis.TokenStream
Lucene.Net.Analysis.TokenFilter
JapaneseKatakanaStemFilter
Implements
System.IDisposable
Inherited Members
Lucene.Net.Analysis.TokenFilter.m_input
Lucene.Net.Analysis.TokenFilter.End()
Lucene.Net.Analysis.TokenFilter.Reset()
Lucene.Net.Analysis.TokenStream.Dispose()
Lucene.Net.Util.AttributeSource.GetAttributeFactory()
Lucene.Net.Util.AttributeSource.GetAttributeClassesEnumerator()
Lucene.Net.Util.AttributeSource.GetAttributeImplsEnumerator()
Lucene.Net.Util.AttributeSource.AddAttributeImpl(Lucene.Net.Util.Attribute)
Lucene.Net.Util.AttributeSource.AddAttribute<T>()
Lucene.Net.Util.AttributeSource.HasAttributes
Lucene.Net.Util.AttributeSource.HasAttribute<T>()
Lucene.Net.Util.AttributeSource.GetAttribute<T>()
Lucene.Net.Util.AttributeSource.ClearAttributes()
Lucene.Net.Util.AttributeSource.CaptureState()
Lucene.Net.Util.AttributeSource.RestoreState(Lucene.Net.Util.AttributeSource.State)
Lucene.Net.Util.AttributeSource.GetHashCode()
Lucene.Net.Util.AttributeSource.ReflectWith(Lucene.Net.Util.IAttributeReflector)
Lucene.Net.Util.AttributeSource.CloneAttributes()
Lucene.Net.Util.AttributeSource.CopyTo(Lucene.Net.Util.AttributeSource)
Lucene.Net.Util.AttributeSource.ToString()
System.Object.Equals(System.Object, System.Object)
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
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 Lucene.Net.Analysis.Cjk.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 Lucene.Net.Analysis.Miscellaneous.SetKeywordMarkerFilter or a custom Lucene.Net.Analysis.TokenFilter that sets the Lucene.Net.Analysis.TokenAttributes.IKeywordAttribute before this Lucene.Net.Analysis.TokenStream.

Constructors

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JapaneseKatakanaStemFilter(TokenStream)

Declaration
public JapaneseKatakanaStemFilter(TokenStream input)
Parameters
Type Name Description
Lucene.Net.Analysis.TokenStream input
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JapaneseKatakanaStemFilter(TokenStream, Int32)

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

Fields

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DEFAULT_MINIMUM_LENGTH

Declaration
public const int DEFAULT_MINIMUM_LENGTH = 4
Field Value
Type Description
System.Int32

Methods

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IncrementToken()

Declaration
public override bool IncrementToken()
Returns
Type Description
System.Boolean
Overrides
Lucene.Net.Analysis.TokenStream.IncrementToken()

Implements

System.IDisposable