Class SnowballFilter

A filter that stems words using a Snowball-generated stemmer.

Available stemmers are listed in Lucene.Net.Tartarus.Snowball.Ext.

NOTE: SnowballFilter expects lowercased text.

• For the Turkish language, see TurkishLowerCaseFilter.
• For other languages, see LowerCaseFilter.

Note: This filter is aware of the Lucene.Net.Analysis.TokenAttributes.KeywordAttribute. To prevent certain terms from being passed to the stemmer IsKeyword should be set to true in a previous Lucene.Net.Analysis.TokenStream. Note: For including the original term as well as the stemmed version, see KeywordRepeatFilterFactory

Inheritance

System.Object

Lucene.Net.Util.AttributeSource

Lucene.Net.Analysis.TokenStream

Lucene.Net.Analysis.TokenFilter

SnowballFilter

Implements

System.IDisposable

Inherited Members

Lucene.Net.Analysis.TokenFilter.m_input

Lucene.Net.Analysis.TokenFilter.End()

TokenFilter.Dispose(Boolean)

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()

AttributeSource.Equals(Object)

AttributeSource.ReflectAsString(Boolean)

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.Snowball

Assembly: Lucene.Net.Analysis.Common.dll

Syntax

public sealed class SnowballFilter : TokenFilter, IDisposable

Constructors

SnowballFilter(TokenStream, SnowballProgram)

Declaration

public SnowballFilter(TokenStream input, SnowballProgram stemmer)

Parameters

Type	Name	Description
Lucene.Net.Analysis.TokenStream	input
SnowballProgram	stemmer

SnowballFilter(TokenStream, String)

Construct the named stemming filter.

Available stemmers are listed in Lucene.Net.Tartarus.Snowball.Ext. The name of a stemmer is the part of the class name before "Stemmer", e.g., the stemmer in EnglishStemmer is named "English".

Declaration

public SnowballFilter(TokenStream in, string name)

Parameters

Type	Name	Description
Lucene.Net.Analysis.TokenStream	in	the input tokens to stem
System.String	name	the name of a stemmer

Methods

IncrementToken()

Returns the next input Lucene.Net.Analysis.Token, after being stemmed

Declaration

public sealed override bool IncrementToken()

Returns

Type	Description
System.Boolean

Overrides

Lucene.Net.Analysis.TokenStream.IncrementToken()

Implements

System.IDisposable