Class GermanAnalyzer

Lucene.Net.Analysis.Analyzer for German language.

Supports an external list of stopwords (words that will not be indexed at all) and an external list of exclusions (word that will not be stemmed, but indexed). A default set of stopwords is used unless an alternative list is specified, but the exclusion list is empty by default.

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

NOTE: This class uses the same Lucene.Net.Util.LuceneVersion dependent settings as StandardAnalyzer.

Inheritance
System.Object
Lucene.Net.Analysis.Analyzer
StopwordAnalyzerBase
GermanAnalyzer
Implements
System.IDisposable
Inherited Members
Lucene.Net.Analysis.Analyzer.Strategy
Lucene.Net.Analysis.Analyzer.Dispose()
Lucene.Net.Analysis.Analyzer.GLOBAL_REUSE_STRATEGY
Lucene.Net.Analysis.Analyzer.PER_FIELD_REUSE_STRATEGY
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: Lucene.Net.Analysis.De
Assembly: Lucene.Net.Analysis.Common.dll
Syntax
public sealed class GermanAnalyzer : StopwordAnalyzerBase, IDisposable

Constructors

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GermanAnalyzer(LuceneVersion)

Builds an analyzer with the default stop words: DefaultStopSet.

Declaration
public GermanAnalyzer(LuceneVersion matchVersion)
Parameters
Type Name Description
Lucene.Net.Util.LuceneVersion matchVersion
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GermanAnalyzer(LuceneVersion, CharArraySet)

Builds an analyzer with the given stop words

Declaration
public GermanAnalyzer(LuceneVersion matchVersion, CharArraySet stopwords)
Parameters
Type Name Description
Lucene.Net.Util.LuceneVersion matchVersion

lucene compatibility version

CharArraySet stopwords

a stopword set

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GermanAnalyzer(LuceneVersion, CharArraySet, CharArraySet)

Builds an analyzer with the given stop words

Declaration
public GermanAnalyzer(LuceneVersion matchVersion, CharArraySet stopwords, CharArraySet stemExclusionSet)
Parameters
Type Name Description
Lucene.Net.Util.LuceneVersion matchVersion

lucene compatibility version

CharArraySet stopwords

a stopword set

CharArraySet stemExclusionSet

a stemming exclusion set

Fields

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DEFAULT_STOPWORD_FILE

File containing default German stopwords.

Declaration
public const string DEFAULT_STOPWORD_FILE = "german_stop.txt"
Field Value
Type Description
System.String

Properties

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DefaultStopSet

Returns a set of default German-stopwords

Declaration
public static CharArraySet DefaultStopSet { get; }
Property Value
Type Description
CharArraySet

a set of default German-stopwords

Methods

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CreateComponents(String, TextReader)

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

Declaration
protected override TokenStreamComponents CreateComponents(string fieldName, TextReader reader)
Parameters
Type Name Description
System.String fieldName
System.IO.TextReader reader
Returns
Type Description
Lucene.Net.Analysis.TokenStreamComponents Lucene.Net.Analysis.TokenStreamComponents built from a StandardTokenizer filtered with StandardFilter, LowerCaseFilter, StopFilter, SetKeywordMarkerFilter if a stem exclusion set is provided, GermanNormalizationFilter and GermanLightStemFilter
Overrides

Implements

System.IDisposable