Package org.apache.lucene.analysis.it
Class ItalianAnalyzer
java.lang.Object
org.apache.lucene.analysis.Analyzer
org.apache.lucene.analysis.StopwordAnalyzerBase
org.apache.lucene.analysis.it.ItalianAnalyzer
- All Implemented Interfaces:
Closeable
,AutoCloseable
Analyzer
for Italian.- Since:
- 3.1
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Nested Class Summary
Nested ClassesModifier and TypeClassDescriptionprivate static class
Atomically loads the DEFAULT_STOP_SET in a lazy fashion once the outer class accesses the static final set the first time.;Nested classes/interfaces inherited from class org.apache.lucene.analysis.Analyzer
Analyzer.ReuseStrategy, Analyzer.TokenStreamComponents
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate static final CharArraySet
static final String
File containing default Italian stopwords.private final CharArraySet
Fields inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase
stopwords
Fields inherited from class org.apache.lucene.analysis.Analyzer
GLOBAL_REUSE_STRATEGY, PER_FIELD_REUSE_STRATEGY
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Constructor Summary
ConstructorsConstructorDescriptionBuilds an analyzer with the default stop words:DEFAULT_STOPWORD_FILE
.ItalianAnalyzer
(CharArraySet stopwords) Builds an analyzer with the given stop words.ItalianAnalyzer
(CharArraySet stopwords, CharArraySet stemExclusionSet) Builds an analyzer with the given stop words. -
Method Summary
Modifier and TypeMethodDescriptionprotected Analyzer.TokenStreamComponents
createComponents
(String fieldName) Creates aAnalyzer.TokenStreamComponents
which tokenizes all the text in the providedReader
.static CharArraySet
Returns an unmodifiable instance of the default stop words set.protected TokenStream
normalize
(String fieldName, TokenStream in) Wrap the givenTokenStream
in order to apply normalization filters.Methods inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase
getStopwordSet, loadStopwordSet, loadStopwordSet
Methods inherited from class org.apache.lucene.analysis.Analyzer
attributeFactory, close, getOffsetGap, getPositionIncrementGap, getReuseStrategy, initReader, initReaderForNormalization, normalize, tokenStream, tokenStream
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Field Details
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stemExclusionSet
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DEFAULT_STOPWORD_FILE
File containing default Italian stopwords.- See Also:
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DEFAULT_ARTICLES
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Constructor Details
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ItalianAnalyzer
public ItalianAnalyzer()Builds an analyzer with the default stop words:DEFAULT_STOPWORD_FILE
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ItalianAnalyzer
Builds an analyzer with the given stop words.- Parameters:
stopwords
- a stopword set
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ItalianAnalyzer
Builds an analyzer with the given stop words. If a non-empty stem exclusion set is provided this analyzer will add aSetKeywordMarkerFilter
before stemming.- Parameters:
stopwords
- a stopword setstemExclusionSet
- a set of terms not to be stemmed
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Method Details
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getDefaultStopSet
Returns an unmodifiable instance of the default stop words set.- Returns:
- default stop words set.
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createComponents
Creates aAnalyzer.TokenStreamComponents
which tokenizes all the text in the providedReader
.- Specified by:
createComponents
in classAnalyzer
- Parameters:
fieldName
- the name of the fields content passed to theAnalyzer.TokenStreamComponents
sink as a reader- Returns:
- A
Analyzer.TokenStreamComponents
built from anStandardTokenizer
filtered withElisionFilter
,LowerCaseFilter
,StopFilter
,SetKeywordMarkerFilter
if a stem exclusion set is provided andItalianLightStemFilter
.
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normalize
Description copied from class:Analyzer
Wrap the givenTokenStream
in order to apply normalization filters. The default implementation returns theTokenStream
as-is. This is used byAnalyzer.normalize(String, String)
.
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