org.apache.lucene.analysis.cz
Class CzechAnalyzer

java.lang.Object
  org.apache.lucene.analysis.Analyzer
      org.apache.lucene.analysis.cz.CzechAnalyzer

public final class CzechAnalyzer
extends Analyzer

Analyzer for Czech language. Supports an external list of stopwords (words that will not be indexed at all). A default set of stopwords is used unless an alternative list is specified, the exclusion list is empty by default.

Author:

Lukas Zapletal [lzap@root.cz]

Field Summary

static String[]

CZECH_STOP_WORDS List of typical stopwords.

Constructor Summary

CzechAnalyzer()
Builds an analyzer with the default stop words (CZECH_STOP_WORDS).

CzechAnalyzer(File stopwords)
Builds an analyzer with the given stop words.

CzechAnalyzer(HashSet stopwords)

CzechAnalyzer(String[] stopwords)
Builds an analyzer with the given stop words.

Method Summary

void	loadStopWords(InputStream wordfile, String encoding) Loads stopwords hash from resource stream (file, database...).
TokenStream	tokenStream(String fieldName, Reader reader) Creates a TokenStream which tokenizes all the text in the provided Reader.

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

getPositionIncrementGap, getPreviousTokenStream, reusableTokenStream, setPreviousTokenStream

Methods inherited from class java.lang.Object

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

Field Detail

CZECH_STOP_WORDS

public static final String[] CZECH_STOP_WORDS

List of typical stopwords.

Constructor Detail

CzechAnalyzer

public CzechAnalyzer()

Builds an analyzer with the default stop words (CZECH_STOP_WORDS).

CzechAnalyzer

public CzechAnalyzer(String[] stopwords)

Builds an analyzer with the given stop words.

CzechAnalyzer

public CzechAnalyzer(HashSet stopwords)

CzechAnalyzer

public CzechAnalyzer(File stopwords)
              throws IOException

Builds an analyzer with the given stop words.

Throws:

IOException

Method Detail

loadStopWords

public void loadStopWords(InputStream wordfile,
                          String encoding)

Loads stopwords hash from resource stream (file, database...).

Parameters:

wordfile - File containing the wordlist

encoding - Encoding used (win-1250, iso-8859-2, ...), null for default system encoding

tokenStream

public final TokenStream tokenStream(String fieldName,
                                     Reader reader)

Creates a TokenStream which tokenizes all the text in the provided Reader.

Specified by:

tokenStream in class Analyzer

Returns:

A TokenStream build from a StandardTokenizer filtered with StandardFilter, LowerCaseFilter, and StopFilter