org.apache.lucene.analysis.bg
Class BulgarianAnalyzer

java.lang.Object
  org.apache.lucene.analysis.Analyzer
      org.apache.lucene.analysis.ReusableAnalyzerBase
          org.apache.lucene.analysis.StopwordAnalyzerBase
              org.apache.lucene.analysis.bg.BulgarianAnalyzer

All Implemented Interfaces:

Closeable

public final class BulgarianAnalyzer
extends StopwordAnalyzerBase

Analyzer for Bulgarian.

This analyzer implements light-stemming as specified by: Searching Strategies for the Bulgarian Language http://members.unine.ch/jacques.savoy/Papers/BUIR.pdf

Nested Class Summary

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

ReusableAnalyzerBase.TokenStreamComponents

Field Summary

static String	DEFAULT_STOPWORD_FILE File containing default Bulgarian stopwords.
static String	STOPWORDS_COMMENT Deprecated. use WordlistLoader.getWordSet(Reader, String, Version) directly

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

matchVersion, stopwords

Constructor Summary

BulgarianAnalyzer(Version matchVersion)
Builds an analyzer with the default stop words: DEFAULT_STOPWORD_FILE.

BulgarianAnalyzer(Version matchVersion, Set<?> stopwords)
Builds an analyzer with the given stop words.

BulgarianAnalyzer(Version matchVersion, Set<?> stopwords, Set<?> stemExclusionSet)
Builds an analyzer with the given stop words and a stem exclusion set.

Method Summary

ReusableAnalyzerBase.TokenStreamComponents	createComponents(String fieldName, Reader reader) Creates a ReusableAnalyzerBase.TokenStreamComponents which tokenizes all the text in the provided Reader.
static Set<?>	getDefaultStopSet() Returns an unmodifiable instance of the default stop-words set.

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

getStopwordSet, loadStopwordSet, loadStopwordSet, loadStopwordSet

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

initReader, reusableTokenStream, tokenStream

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

close, getOffsetGap, getPositionIncrementGap, getPreviousTokenStream, setPreviousTokenStream

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 Bulgarian stopwords. Default stopword list is from http://members.unine.ch/jacques.savoy/clef/index.html The stopword list is BSD-Licensed.

See Also:

Constant Field Values

STOPWORDS_COMMENT

@Deprecated
public static final String STOPWORDS_COMMENT

Deprecated. use WordlistLoader.getWordSet(Reader, String, Version) directly

The comment character in the stopwords file. All lines prefixed with this will be ignored

See Also:

Constant Field Values

Constructor Detail

BulgarianAnalyzer

public BulgarianAnalyzer(Version matchVersion)

Builds an analyzer with the default stop words: DEFAULT_STOPWORD_FILE.

BulgarianAnalyzer

public BulgarianAnalyzer(Version matchVersion,
                         Set<?> stopwords)

Builds an analyzer with the given stop words.

BulgarianAnalyzer

public BulgarianAnalyzer(Version matchVersion,
                         Set<?> stopwords,
                         Set<?> stemExclusionSet)

Builds an analyzer with the given stop words and a stem exclusion set. If a stem exclusion set is provided this analyzer will add a KeywordMarkerFilter before BulgarianStemFilter.

Method Detail

getDefaultStopSet

public static Set<?> getDefaultStopSet()

Returns an unmodifiable instance of the default stop-words set.

Returns:

an unmodifiable instance of the default stop-words set.

createComponents

public ReusableAnalyzerBase.TokenStreamComponents createComponents(String fieldName,
                                                                   Reader reader)

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

Specified by:

createComponents in class ReusableAnalyzerBase

Parameters:

fieldName - the name of the fields content passed to the ReusableAnalyzerBase.TokenStreamComponents sink as a reader

reader - the reader passed to the Tokenizer constructor

Returns:

A ReusableAnalyzerBase.TokenStreamComponents built from an StandardTokenizer filtered with StandardFilter, LowerCaseFilter, StopFilter , KeywordMarkerFilter if a stem exclusion set is provided and BulgarianStemFilter.