Package org.apache.lucene.analysis.ta
Class TamilAnalyzer
- java.lang.Object
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- org.apache.lucene.analysis.Analyzer
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- org.apache.lucene.analysis.StopwordAnalyzerBase
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- org.apache.lucene.analysis.ta.TamilAnalyzer
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- All Implemented Interfaces:
Closeable,AutoCloseable
public final class TamilAnalyzer extends StopwordAnalyzerBase
Analyzer for Tamil.- Since:
- 9.0
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Nested Class Summary
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Nested classes/interfaces inherited from class org.apache.lucene.analysis.Analyzer
Analyzer.ReuseStrategy, Analyzer.TokenStreamComponents
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Field Summary
Fields Modifier and Type Field Description static StringDEFAULT_STOPWORD_FILEFile containing default Tamil stopwords.-
Fields inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase
stopwords
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Fields inherited from class org.apache.lucene.analysis.Analyzer
GLOBAL_REUSE_STRATEGY, PER_FIELD_REUSE_STRATEGY
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Constructor Summary
Constructors Constructor Description TamilAnalyzer()Builds an analyzer with the default stop words:DEFAULT_STOPWORD_FILE.TamilAnalyzer(CharArraySet stopwords)Builds an analyzer with the given stop wordsTamilAnalyzer(CharArraySet stopwords, CharArraySet stemExclusionSet)Builds an analyzer with the given stop words
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description protected Analyzer.TokenStreamComponentscreateComponents(String fieldName)CreatesAnalyzer.TokenStreamComponentsused to tokenize all the text in the providedReader.static CharArraySetgetDefaultStopSet()Returns an unmodifiable instance of the default stop-words set.protected TokenStreamnormalize(String fieldName, TokenStream in)-
Methods inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase
getStopwordSet, loadStopwordSet, loadStopwordSet, loadStopwordSet
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Methods inherited from class org.apache.lucene.analysis.Analyzer
attributeFactory, close, getOffsetGap, getPositionIncrementGap, getReuseStrategy, initReader, initReaderForNormalization, normalize, tokenStream, tokenStream
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Field Detail
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DEFAULT_STOPWORD_FILE
public static final String DEFAULT_STOPWORD_FILE
File containing default Tamil stopwords.Default stopword list is from https://github.com/AshokR/TamilNLP (Apache 2 License)
- See Also:
- Constant Field Values
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Constructor Detail
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TamilAnalyzer
public TamilAnalyzer(CharArraySet stopwords, CharArraySet stemExclusionSet)
Builds an analyzer with the given stop words- Parameters:
stopwords- a stopword setstemExclusionSet- a stemming exclusion set
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TamilAnalyzer
public TamilAnalyzer(CharArraySet stopwords)
Builds an analyzer with the given stop words- Parameters:
stopwords- a stopword set
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TamilAnalyzer
public TamilAnalyzer()
Builds an analyzer with the default stop words:DEFAULT_STOPWORD_FILE.
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Method Detail
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getDefaultStopSet
public static CharArraySet getDefaultStopSet()
Returns an unmodifiable instance of the default stop-words set.- Returns:
- an unmodifiable instance of the default stop-words set.
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createComponents
protected Analyzer.TokenStreamComponents createComponents(String fieldName)
CreatesAnalyzer.TokenStreamComponentsused to tokenize all the text in the providedReader.- Specified by:
createComponentsin classAnalyzer- Returns:
Analyzer.TokenStreamComponentsbuilt from aStandardTokenizerfiltered withLowerCaseFilter,DecimalDigitFilter,IndicNormalizationFilter,SetKeywordMarkerFilterif a stem exclusion set is provided,SnowballFilter, and Tamil Stop words
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normalize
protected TokenStream normalize(String fieldName, TokenStream in)
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