Package org.apache.lucene.analysis.pl

Class PolishAnalyzer

java.lang.Object

org.apache.lucene.analysis.Analyzer

org.apache.lucene.analysis.StopwordAnalyzerBase

org.apache.lucene.analysis.pl.PolishAnalyzer

All Implemented Interfaces:

Closeable, AutoCloseable

public final class PolishAnalyzer
extends StopwordAnalyzerBase

Analyzer for Polish.

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 final String	DEFAULT_STEMMER_FILE	File containing default Polish stemmer table.
static final String	DEFAULT_STOPWORD_FILE	File containing default Polish 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
PolishAnalyzer()	Builds an analyzer with the default stop words: DEFAULT_STOPWORD_FILE.
PolishAnalyzer(CharArraySet stopwords)	Builds an analyzer with the given stop words.
PolishAnalyzer(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.
static Trie	getDefaultTable()	Returns an unmodifiable instance of the default stemmer table.
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, initReader, initReaderForNormalization, normalize, tokenStream, tokenStream

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_STOPWORD_FILE

public static final String DEFAULT_STOPWORD_FILE

File containing default Polish stopwords.

See Also:

• Constant Field Values

DEFAULT_STEMMER_FILE

public static final String DEFAULT_STEMMER_FILE

File containing default Polish stemmer table.

See Also:

• Constant Field Values

Constructor Details

PolishAnalyzer

public PolishAnalyzer()

Builds an analyzer with the default stop words: DEFAULT_STOPWORD_FILE.

PolishAnalyzer

public PolishAnalyzer(CharArraySet stopwords)

Builds an analyzer with the given stop words.

Parameters:

stopwords - a stopword set

PolishAnalyzer

public PolishAnalyzer(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 Details

getDefaultStopSet

public static CharArraySet getDefaultStopSet()

Returns an unmodifiable instance of the default stop words set.

Returns:

default stop words set.

getDefaultTable

public static Trie getDefaultTable()

Returns an unmodifiable instance of the default stemmer table.

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 StempelFilter.

normalize

protected TokenStream normalize(String fieldName,
 TokenStream in)

Overrides:

normalize in class Analyzer