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 org.apache.lucene.analysis.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.

NOTE: This class uses the same Version dependent settings as StandardAnalyzer.

Field Summary

static String[]

CZECH_STOP_WORDS List of typical stopwords.

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

overridesTokenStreamMethod

Constructor Summary

CzechAnalyzer()
Deprecated. Use CzechAnalyzer(Version) instead

CzechAnalyzer(File stopwords)
Deprecated. Use CzechAnalyzer(Version, File) instead

CzechAnalyzer(HashSet stopwords)
Deprecated. Use CzechAnalyzer(Version, HashSet) instead

CzechAnalyzer(String[] stopwords)
Deprecated. Use CzechAnalyzer(Version, String[]) instead

CzechAnalyzer(org.apache.lucene.util.Version matchVersion)
Builds an analyzer with the default stop words (CZECH_STOP_WORDS).

CzechAnalyzer(org.apache.lucene.util.Version matchVersion, File stopwords)
Builds an analyzer with the given stop words.

CzechAnalyzer(org.apache.lucene.util.Version matchVersion, HashSet stopwords)

CzechAnalyzer(org.apache.lucene.util.Version matchVersion, 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...).
org.apache.lucene.analysis.TokenStream	reusableTokenStream(String fieldName, Reader reader) Returns a (possibly reused) TokenStream which tokenizes all the text in the provided Reader.
org.apache.lucene.analysis.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

close, getOffsetGap, getPositionIncrementGap, getPreviousTokenStream, setOverridesTokenStreamMethod, 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()

Deprecated. Use CzechAnalyzer(Version) instead

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

CzechAnalyzer

public CzechAnalyzer(org.apache.lucene.util.Version matchVersion)

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

CzechAnalyzer

public CzechAnalyzer(String[] stopwords)

Deprecated. Use CzechAnalyzer(Version, String[]) instead

Builds an analyzer with the given stop words.

CzechAnalyzer

public CzechAnalyzer(org.apache.lucene.util.Version matchVersion,
                     String[] stopwords)

Builds an analyzer with the given stop words.

CzechAnalyzer

public CzechAnalyzer(HashSet stopwords)

Deprecated. Use CzechAnalyzer(Version, HashSet) instead

CzechAnalyzer

public CzechAnalyzer(org.apache.lucene.util.Version matchVersion,
                     HashSet stopwords)

CzechAnalyzer

public CzechAnalyzer(File stopwords)
              throws IOException

Deprecated. Use CzechAnalyzer(Version, File) instead

Builds an analyzer with the given stop words.

Throws:

IOException

CzechAnalyzer

public CzechAnalyzer(org.apache.lucene.util.Version matchVersion,
                     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 org.apache.lucene.analysis.TokenStream tokenStream(String fieldName,
                                                                Reader reader)

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

Specified by:

tokenStream in class org.apache.lucene.analysis.Analyzer

Returns:

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

reusableTokenStream

public org.apache.lucene.analysis.TokenStream reusableTokenStream(String fieldName,
                                                                  Reader reader)
                                                           throws IOException

Returns a (possibly reused) TokenStream which tokenizes all the text in the provided Reader.

Overrides:

reusableTokenStream in class org.apache.lucene.analysis.Analyzer

Returns:

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

Throws:

IOException