Package org.apache.lucene.analysis.ne

Class NepaliAnalyzer

java.lang.Object

org.apache.lucene.analysis.Analyzer

org.apache.lucene.analysis.StopwordAnalyzerBase

org.apache.lucene.analysis.ne.NepaliAnalyzer

All Implemented Interfaces:

Closeable, AutoCloseable

public final class NepaliAnalyzer
extends StopwordAnalyzerBase

Analyzer for Nepali.

Since:

9.0

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_STOPWORD_FILE	File containing default Nepali 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
NepaliAnalyzer()	Builds an analyzer with the default stop words: DEFAULT_STOPWORD_FILE.
NepaliAnalyzer(CharArraySet stopwords)	Builds an analyzer with the given stop words
NepaliAnalyzer(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 Analyzer.TokenStreamComponents used to tokenize 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, 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 Nepali stopwords.

Default stopword list is from the Apache2 python project NLTK: https://github.com/nltk/nltk_data

See Also:

• Constant Field Values

Constructor Details

NepaliAnalyzer

public NepaliAnalyzer(CharArraySet stopwords,
 CharArraySet stemExclusionSet)

Builds an analyzer with the given stop words

Parameters:

stopwords - a stopword set

stemExclusionSet - a stemming exclusion set

NepaliAnalyzer

public NepaliAnalyzer(CharArraySet stopwords)

Builds an analyzer with the given stop words

Parameters:

stopwords - a stopword set

NepaliAnalyzer

public NepaliAnalyzer()

Builds an analyzer with the default stop words: DEFAULT_STOPWORD_FILE.

Method Details

getDefaultStopSet

public static CharArraySet getDefaultStopSet()

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

Returns:

an unmodifiable instance of the default stop-words set.

createComponents

protected Analyzer.TokenStreamComponents createComponents(String fieldName)

Creates Analyzer.TokenStreamComponents used to tokenize all the text in the provided Reader.

Specified by:

createComponents in class Analyzer

Returns:

Analyzer.TokenStreamComponents built from a StandardTokenizer filtered with LowerCaseFilter, DecimalDigitFilter, IndicNormalizationFilter, SetKeywordMarkerFilter if a stem exclusion set is provided, SnowballFilter, and Nepali Stop words

normalize

protected TokenStream normalize(String fieldName,
 TokenStream in)

Overrides:

normalize in class Analyzer