Package org.apache.lucene.analysis.it

Class ItalianAnalyzer

java.lang.Object

org.apache.lucene.analysis.Analyzer

org.apache.lucene.analysis.util.StopwordAnalyzerBase

org.apache.lucene.analysis.it.ItalianAnalyzer

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public final class ItalianAnalyzer
extends StopwordAnalyzerBase

Analyzer for Italian.

You must specify the required Version compatibility when creating ItalianAnalyzer:

• As of 3.6, ItalianLightStemFilter is used for less aggressive stemming.
• As of 3.2, ElisionFilter with a set of Italian contractions is used by default.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.analysis.Analyzer

Analyzer.GlobalReuseStrategy, Analyzer.PerFieldReuseStrategy, Analyzer.ReuseStrategy, Analyzer.TokenStreamComponents

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	DEFAULT_STOPWORD_FILE	File containing default Italian stopwords.

Fields inherited from class org.apache.lucene.analysis.Analyzer

GLOBAL_REUSE_STRATEGY, PER_FIELD_REUSE_STRATEGY

Constructor Summary

Constructors

Constructor	Description
ItalianAnalyzer(Version matchVersion)	Builds an analyzer with the default stop words: DEFAULT_STOPWORD_FILE.
ItalianAnalyzer(Version matchVersion, CharArraySet stopwords)	Builds an analyzer with the given stop words.
ItalianAnalyzer(Version matchVersion, CharArraySet stopwords, CharArraySet stemExclusionSet)	Builds an analyzer with the given stop words.

Method Summary

Modifier and Type	Method	Description
static CharArraySet	getDefaultStopSet()	Returns an unmodifiable instance of the default stop words set.

Methods inherited from class org.apache.lucene.analysis.util.StopwordAnalyzerBase

getStopwordSet

Methods inherited from class org.apache.lucene.analysis.Analyzer

close, getOffsetGap, getPositionIncrementGap, getReuseStrategy, tokenStream, tokenStream

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_STOPWORD_FILE

public static final java.lang.String DEFAULT_STOPWORD_FILE

File containing default Italian stopwords.

See Also:

Constant Field Values

Constructor Detail

ItalianAnalyzer

public ItalianAnalyzer(Version matchVersion)

Builds an analyzer with the default stop words: DEFAULT_STOPWORD_FILE.

ItalianAnalyzer

public ItalianAnalyzer(Version matchVersion,
                       CharArraySet stopwords)

Builds an analyzer with the given stop words.

Parameters:

matchVersion - lucene compatibility version

stopwords - a stopword set

ItalianAnalyzer

public ItalianAnalyzer(Version matchVersion,
                       CharArraySet stopwords,
                       CharArraySet stemExclusionSet)

Builds an analyzer with the given stop words. If a non-empty stem exclusion set is provided this analyzer will add a SetKeywordMarkerFilter before stemming.

Parameters:

matchVersion - lucene compatibility version

stopwords - a stopword set

stemExclusionSet - a set of terms not to be stemmed

Method Detail

getDefaultStopSet

public static CharArraySet getDefaultStopSet()

Returns an unmodifiable instance of the default stop words set.

Returns:

default stop words set.