Class CzechAnalyzer

Lucene.Net.Analysis.Analyzer for Czech language.

Supports an external list of stopwords (words that will not be indexed at all). A default set of stopwords is used unless an alternative list is specified.

You must specify the required Lucene.Net.Util.LuceneVersion compatibility when creating CzechAnalyzer:

• As of 3.1, words are stemmed with CzechStemFilter
• As of 2.9, StopFilter preserves position increments
• As of 2.4, Tokens incorrectly identified as acronyms are corrected (see LUCENE-1068)

Inheritance

object

Analyzer

StopwordAnalyzerBase

CzechAnalyzer

Implements

IDisposable

Inherited Members

StopwordAnalyzerBase.StopwordSet

Analyzer.NewAnonymous(Func<string, TextReader, TokenStreamComponents>)

Analyzer.NewAnonymous(Func<string, TextReader, TokenStreamComponents>, ReuseStrategy)

Analyzer.NewAnonymous(Func<string, TextReader, TokenStreamComponents>, Func<string, TextReader, TextReader>)

Analyzer.NewAnonymous(Func<string, TextReader, TokenStreamComponents>, Func<string, TextReader, TextReader>, ReuseStrategy)

Analyzer.GetTokenStream(string, TextReader)

Analyzer.GetTokenStream(string, string)

Analyzer.GetPositionIncrementGap(string)

Analyzer.GetOffsetGap(string)

Analyzer.Strategy

Analyzer.Dispose()

Analyzer.GLOBAL_REUSE_STRATEGY

Analyzer.PER_FIELD_REUSE_STRATEGY

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: Lucene.Net.Analysis.Cz

Assembly: Lucene.Net.Analysis.Common.dll

Syntax

public sealed class CzechAnalyzer : StopwordAnalyzerBase, IDisposable

Constructors

CzechAnalyzer(LuceneVersion)

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

Declaration

public CzechAnalyzer(LuceneVersion matchVersion)

Parameters

Type	Name	Description
LuceneVersion	matchVersion	Lucene.Net.Util.LuceneVersion to match

CzechAnalyzer(LuceneVersion, CharArraySet)

Builds an analyzer with the given stop words.

Declaration

public CzechAnalyzer(LuceneVersion matchVersion, CharArraySet stopwords)

Parameters

Type	Name	Description
LuceneVersion	matchVersion	Lucene.Net.Util.LuceneVersion to match
CharArraySet	stopwords	a stopword set

CzechAnalyzer(LuceneVersion, CharArraySet, CharArraySet)

Builds an analyzer with the given stop words and a set of work to be excluded from the CzechStemFilter.

Declaration

public CzechAnalyzer(LuceneVersion matchVersion, CharArraySet stopwords, CharArraySet stemExclusionTable)

Parameters

Type	Name	Description
LuceneVersion	matchVersion	Lucene.Net.Util.LuceneVersion to match
CharArraySet	stopwords	a stopword set
CharArraySet	stemExclusionTable	a stemming exclusion set

Fields

DEFAULT_STOPWORD_FILE

File containing default Czech stopwords.

Declaration

public const string DEFAULT_STOPWORD_FILE = "stopwords.txt"

Field Value

Type	Description
string

Properties

DefaultStopSet

Returns a set of default Czech-stopwords

Declaration

public static CharArraySet DefaultStopSet { get; }

Property Value

Type	Description
CharArraySet	a set of default Czech-stopwords

Methods

CreateComponents(string, TextReader)

Creates Lucene.Net.Analysis.TokenStreamComponents used to tokenize all the text in the provided TextReader.

Declaration

protected override TokenStreamComponents CreateComponents(string fieldName, TextReader reader)

Parameters

Type	Name	Description
string	fieldName
TextReader	reader

Returns

Type	Description
TokenStreamComponents	Lucene.Net.Analysis.TokenStreamComponents built from a StandardTokenizer filtered with StandardFilter, LowerCaseFilter, StopFilter, and CzechStemFilter (only if version is >= LUCENE_31). If a version is >= LUCENE_31 and a stem exclusion set is provided via CzechAnalyzer(LuceneVersion, CharArraySet, CharArraySet) a SetKeywordMarkerFilter is added before CzechStemFilter.

Overrides

Analyzer.CreateComponents(string, TextReader)

Implements

IDisposable