Class ClassicAnalyzer

Filters ClassicTokenizer with ClassicFilter, LowerCaseFilter and StopFilter, using a list of English stop words.

You must specify the required LuceneVersion compatibility when creating ClassicAnalyzer:

  • As of 3.1, StopFilter correctly handles Unicode 4.0 supplementary characters in stopwords
  • As of 2.9, StopFilter preserves position increments
  • As of 2.4, Tokens incorrectly identified as acronyms are corrected (see LUCENE-1068)
ClassicAnalyzer was named StandardAnalyzer in Lucene versions prior to 3.1. As of 3.1, StandardAnalyzer implements Unicode text segmentation, as specified by UAX#29.

Inheritance
System.Object
Analyzer
StopwordAnalyzerBase
ClassicAnalyzer
Inherited Members
Lucene.Net.Analysis.Analyzer.NewAnonymous(Func<, , >)
Lucene.Net.Analysis.Analyzer.NewAnonymous(Func<, , >, Lucene.Net.Analysis.ReuseStrategy)
Lucene.Net.Analysis.Analyzer.NewAnonymous(Func<, , >, Func<, , >)
Lucene.Net.Analysis.Analyzer.NewAnonymous(Func<, , >, Func<, , >, Lucene.Net.Analysis.ReuseStrategy)
Namespace: Lucene.Net.Analysis.Standard
Assembly: Lucene.Net.Analysis.Common.dll
Syntax
public sealed class ClassicAnalyzer : StopwordAnalyzerBase

Constructors

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ClassicAnalyzer(LuceneVersion)

Builds an analyzer with the default stop words (STOP_WORDS_SET).

Declaration
public ClassicAnalyzer(LuceneVersion matchVersion)
Parameters
Type Name Description
LuceneVersion matchVersion

Lucene compatibility version - See ClassicAnalyzer

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ClassicAnalyzer(LuceneVersion, CharArraySet)

Builds an analyzer with the given stop words.

Declaration
public ClassicAnalyzer(LuceneVersion matchVersion, CharArraySet stopWords)
Parameters
Type Name Description
LuceneVersion matchVersion

Lucene compatibility version - See ClassicAnalyzer

CharArraySet stopWords

stop words

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ClassicAnalyzer(LuceneVersion, TextReader)

Builds an analyzer with the stop words from the given reader.

Declaration
public ClassicAnalyzer(LuceneVersion matchVersion, TextReader stopwords)
Parameters
Type Name Description
LuceneVersion matchVersion

Lucene compatibility version - See ClassicAnalyzer

TextReader stopwords

to read stop words from

See Also

Fields

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DEFAULT_MAX_TOKEN_LENGTH

Default maximum allowed token length

Declaration
public const int DEFAULT_MAX_TOKEN_LENGTH = null
Field Value
Type Description
System.Int32
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STOP_WORDS_SET

An unmodifiable set containing some common English words that are usually not useful for searching.

Declaration
public static readonly CharArraySet STOP_WORDS_SET
Field Value
Type Description
CharArraySet

Properties

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MaxTokenLength

Gets or sets maximum allowed token length. If a token is seen that exceeds this length then it is discarded. This setting only takes effect the next time tokenStream or tokenStream is called.

Declaration
public int MaxTokenLength { get; set; }
Property Value
Type Description
System.Int32

Methods

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CreateComponents(String, TextReader)

Declaration
protected override TokenStreamComponents CreateComponents(string fieldName, TextReader reader)
Parameters
Type Name Description
System.String fieldName
TextReader reader
Returns
Type Description
TokenStreamComponents