Package org.apache.lucene.analysis.pt

Class PortugueseAnalyzer

java.lang.Object

org.apache.lucene.analysis.Analyzer

org.apache.lucene.analysis.StopwordAnalyzerBase

org.apache.lucene.analysis.pt.PortugueseAnalyzer

All Implemented Interfaces:

Closeable, AutoCloseable

public final class PortugueseAnalyzer
extends StopwordAnalyzerBase

Analyzer for Portuguese.

Since:

3.1

Nested Class Summary

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

Analyzer.ReuseStrategy, Analyzer.TokenStreamComponents

Field Summary

Fields

Modifier and Type	Field	Description
static String	DEFAULT_STOPWORD_FILE	File containing default Portuguese stopwords.

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

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
protected Analyzer.TokenStreamComponents	createComponents(String fieldName)	Creates a Analyzer.TokenStreamComponents which tokenizes all the text in the provided Reader.
static CharArraySet	getDefaultStopSet()	Returns an unmodifiable instance of the default stop words set.
protected 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, getVersion, initReader, initReaderForNormalization, normalize, setVersion, tokenStream, tokenStream

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_STOPWORD_FILE

public static final String DEFAULT_STOPWORD_FILE

File containing default Portuguese stopwords.

See Also:

Constant Field Values

Constructor Detail

PortugueseAnalyzer

public PortugueseAnalyzer()

Builds an analyzer with the default stop words: DEFAULT_STOPWORD_FILE.

PortugueseAnalyzer

public PortugueseAnalyzer(CharArraySet stopwords)

Builds an analyzer with the given stop words.

Parameters:

stopwords - a stopword set

PortugueseAnalyzer

public PortugueseAnalyzer(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:

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.

createComponents

protected Analyzer.TokenStreamComponents createComponents(String fieldName)

Creates a Analyzer.TokenStreamComponents which tokenizes all the text in the provided Reader.

Specified by:

createComponents in class Analyzer

Returns:

A Analyzer.TokenStreamComponents built from an StandardTokenizer filtered with LowerCaseFilter, StopFilter , SetKeywordMarkerFilter if a stem exclusion set is provided and PortugueseLightStemFilter.

normalize

protected TokenStream normalize(String fieldName,
                                TokenStream in)

Overrides:

normalize in class Analyzer