org.apache.lucene.analysis.cz
Class CzechAnalyzer

java.lang.Object
  extended by org.apache.lucene.analysis.Analyzer
      extended by org.apache.lucene.analysis.util.StopwordAnalyzerBase
          extended by org.apache.lucene.analysis.cz.CzechAnalyzer
All Implemented Interfaces:
Closeable

public final class CzechAnalyzer
extends StopwordAnalyzerBase

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.

You must specify the required Version compatibility when creating CzechAnalyzer:


Nested Class Summary
 
Nested classes/interfaces inherited from class org.apache.lucene.analysis.Analyzer
Analyzer.GlobalReuseStrategy, Analyzer.PerFieldReuseStrategy, Analyzer.ReuseStrategy, Analyzer.TokenStreamComponents
 
Field Summary
static String DEFAULT_STOPWORD_FILE
          File containing default Czech stopwords.
 
Fields inherited from class org.apache.lucene.analysis.util.StopwordAnalyzerBase
matchVersion, stopwords
 
Fields inherited from class org.apache.lucene.analysis.Analyzer
GLOBAL_REUSE_STRATEGY, PER_FIELD_REUSE_STRATEGY
 
Constructor Summary
CzechAnalyzer(Version matchVersion)
          Builds an analyzer with the default stop words (getDefaultStopSet()).
CzechAnalyzer(Version matchVersion, CharArraySet stopwords)
          Builds an analyzer with the given stop words.
CzechAnalyzer(Version matchVersion, CharArraySet stopwords, CharArraySet stemExclusionTable)
          Builds an analyzer with the given stop words and a set of work to be excluded from the CzechStemFilter.
 
Method Summary
protected  Analyzer.TokenStreamComponents createComponents(String fieldName, Reader reader)
          Creates Analyzer.TokenStreamComponents used to tokenize all the text in the provided Reader.
static CharArraySet getDefaultStopSet()
          Returns a set of default Czech-stopwords
 
Methods inherited from class org.apache.lucene.analysis.util.StopwordAnalyzerBase
getStopwordSet, loadStopwordSet, loadStopwordSet, loadStopwordSet
 
Methods inherited from class org.apache.lucene.analysis.Analyzer
close, getOffsetGap, getPositionIncrementGap, getReuseStrategy, initReader, tokenStream, tokenStream
 
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 Czech stopwords.

See Also:
Constant Field Values
Constructor Detail

CzechAnalyzer

public CzechAnalyzer(Version matchVersion)
Builds an analyzer with the default stop words (getDefaultStopSet()).

Parameters:
matchVersion - Lucene version to match See above

CzechAnalyzer

public CzechAnalyzer(Version matchVersion,
                     CharArraySet stopwords)
Builds an analyzer with the given stop words.

Parameters:
matchVersion - Lucene version to match See above
stopwords - a stopword set

CzechAnalyzer

public CzechAnalyzer(Version matchVersion,
                     CharArraySet stopwords,
                     CharArraySet stemExclusionTable)
Builds an analyzer with the given stop words and a set of work to be excluded from the CzechStemFilter.

Parameters:
matchVersion - Lucene version to match See above
stopwords - a stopword set
stemExclusionTable - a stemming exclusion set
Method Detail

getDefaultStopSet

public static final CharArraySet getDefaultStopSet()
Returns a set of default Czech-stopwords

Returns:
a set of default Czech-stopwords

createComponents

protected Analyzer.TokenStreamComponents createComponents(String fieldName,
                                                          Reader reader)
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 StandardFilter, LowerCaseFilter, StopFilter , and CzechStemFilter (only if version is >= LUCENE_31). If a version is >= LUCENE_31 and a stem exclusion set is provided via CzechAnalyzer(Version, CharArraySet, CharArraySet) a SetKeywordMarkerFilter is added before CzechStemFilter.


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