Package org.apache.lucene.analysis.cz
Class CzechAnalyzer
java.lang.Object
org.apache.lucene.analysis.Analyzer
org.apache.lucene.analysis.StopwordAnalyzerBase
org.apache.lucene.analysis.cz.CzechAnalyzer
- All Implemented Interfaces:
Closeable
,AutoCloseable
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.
- Since:
- 3.1
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Nested Class Summary
Nested classes/interfaces inherited from class org.apache.lucene.analysis.Analyzer
Analyzer.ReuseStrategy, Analyzer.TokenStreamComponents
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Field Summary
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
ConstructorDescriptionBuilds an analyzer with the default stop words (getDefaultStopSet()
).CzechAnalyzer
(CharArraySet stopwords) Builds an analyzer with the given stop words.CzechAnalyzer
(CharArraySet stopwords, CharArraySet stemExclusionTable) Builds an analyzer with the given stop words and a set of work to be excluded from theCzechStemFilter
. -
Method Summary
Modifier and TypeMethodDescriptionprotected Analyzer.TokenStreamComponents
createComponents
(String fieldName) CreatesAnalyzer.TokenStreamComponents
used to tokenize all the text in the providedReader
.static final CharArraySet
Returns a set of default Czech-stopwordsprotected TokenStream
normalize
(String fieldName, TokenStream in) Methods inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase
getStopwordSet, loadStopwordSet, 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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DEFAULT_STOPWORD_FILE
File containing default Czech stopwords.- See Also:
-
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Constructor Details
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CzechAnalyzer
public CzechAnalyzer()Builds an analyzer with the default stop words (getDefaultStopSet()
). -
CzechAnalyzer
Builds an analyzer with the given stop words.- Parameters:
stopwords
- a stopword set
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CzechAnalyzer
Builds an analyzer with the given stop words and a set of work to be excluded from theCzechStemFilter
.- Parameters:
stopwords
- a stopword setstemExclusionTable
- a stemming exclusion set
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Method Details
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getDefaultStopSet
Returns a set of default Czech-stopwords- Returns:
- a set of default Czech-stopwords
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createComponents
CreatesAnalyzer.TokenStreamComponents
used to tokenize all the text in the providedReader
.- Specified by:
createComponents
in classAnalyzer
- Returns:
Analyzer.TokenStreamComponents
built from aStandardTokenizer
filtered withLowerCaseFilter
,StopFilter
, andCzechStemFilter
(only if version is >= LUCENE_31). If a stem exclusion set is provided viaCzechAnalyzer(CharArraySet, CharArraySet)
aSetKeywordMarkerFilter
is added beforeCzechStemFilter
.
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normalize
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