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.

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

Inheritance
System.Object
AttributeSource
TokenStream
TokenFilter
SnowballFilter
Implements
System.IDisposable
Inherited Members
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

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SnowballFilter(TokenStream, SnowballProgram)

Declaration
public SnowballFilter(TokenStream input, SnowballProgram stemmer)
Parameters
Type Name Description
TokenStream input
SnowballProgram stemmer
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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
TokenStream in

the input tokens to stem

System.String name

the name of a stemmer

Methods

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IncrementToken()

Returns the next input Token, after being stemmed

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

Implements

System.IDisposable