Class DutchAnalyzer

Lucene.Net.Analysis.Analyzer for Dutch language.

Supports an external list of stopwords (words that will not be indexed at all), an external list of exclusions (word that will not be stemmed, but indexed) and an external list of word-stem pairs that overrule the algorithm (dictionary stemming). 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 DutchAnalyzer:

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

Inheritance
System.Object
Lucene.Net.Analysis.Analyzer
DutchAnalyzer
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.Nl
Assembly: Lucene.Net.Analysis.Common.dll
Syntax
public sealed class DutchAnalyzer : Analyzer, IDisposable

Constructors

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DutchAnalyzer(LuceneVersion)

Builds an analyzer with the default stop words (DefaultStopSet) and a few default entries for the stem exclusion table.

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

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

Declaration
public DutchAnalyzer(LuceneVersion matchVersion, CharArraySet stopwords, CharArraySet stemExclusionTable)
Parameters
Type Name Description
Lucene.Net.Util.LuceneVersion matchVersion
CharArraySet stopwords
CharArraySet stemExclusionTable
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DutchAnalyzer(LuceneVersion, CharArraySet, CharArraySet, CharArrayMap<String>)

Declaration
public DutchAnalyzer(LuceneVersion matchVersion, CharArraySet stopwords, CharArraySet stemExclusionTable, CharArrayMap<string> stemOverrideDict)
Parameters
Type Name Description
Lucene.Net.Util.LuceneVersion matchVersion
CharArraySet stopwords
CharArraySet stemExclusionTable
CharArrayMap<System.String> stemOverrideDict

Fields

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DEFAULT_STOPWORD_FILE

File containing default Dutch stopwords.

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

Properties

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DefaultStopSet

Returns an unmodifiable instance of the default stop-words set.

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

an unmodifiable instance of the default stop-words set.

Methods

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CreateComponents(String, TextReader)

Returns a (possibly reused) Lucene.Net.Analysis.TokenStream which tokenizes all the text in the provided System.IO.TextReader.

Declaration
protected override TokenStreamComponents CreateComponents(string fieldName, TextReader aReader)
Parameters
Type Name Description
System.String fieldName
System.IO.TextReader aReader
Returns
Type Description
Lucene.Net.Analysis.TokenStreamComponents

A Lucene.Net.Analysis.TokenStream built from a StandardTokenizer filtered with StandardFilter, LowerCaseFilter, StopFilter, SetKeywordMarkerFilter if a stem exclusion set is provided, StemmerOverrideFilter, and SnowballFilter

Overrides

Implements

System.IDisposable