Class CJKAnalyzer

  extended by org.apache.lucene.analysis.Analyzer
      extended by org.apache.lucene.analysis.util.StopwordAnalyzerBase
          extended by org.apache.lucene.analysis.cjk.CJKAnalyzer
All Implemented Interfaces:

public final class CJKAnalyzer
extends StopwordAnalyzerBase

An Analyzer that tokenizes text with StandardTokenizer, normalizes content with CJKWidthFilter, folds case with LowerCaseFilter, forms bigrams of CJK with CJKBigramFilter, and filters stopwords with StopFilter

Nested Class Summary
Nested classes/interfaces inherited from class org.apache.lucene.analysis.Analyzer
Analyzer.GlobalReuseStrategy, Analyzer.PerFieldReuseStrategy, Analyzer.ReuseStrategy, Analyzer.TokenStreamComponents
Field Summary
          File containing default CJK stopwords.
Fields inherited from class org.apache.lucene.analysis.util.StopwordAnalyzerBase
matchVersion, stopwords
Constructor Summary
CJKAnalyzer(Version matchVersion)
          Builds an analyzer which removes words in getDefaultStopSet().
CJKAnalyzer(Version matchVersion, CharArraySet stopwords)
          Builds an analyzer with the given stop words
Method Summary
protected  Analyzer.TokenStreamComponents createComponents(String fieldName, Reader reader)
static CharArraySet getDefaultStopSet()
          Returns an unmodifiable instance of the default stop-words set.
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, initReader, tokenStream
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail


public static final String DEFAULT_STOPWORD_FILE
File containing default CJK stopwords.

Currently it contains some common English words that are not usually useful for searching and some double-byte interpunctions.

See Also:
Constant Field Values
Constructor Detail


public CJKAnalyzer(Version matchVersion)
Builds an analyzer which removes words in getDefaultStopSet().


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

matchVersion - lucene compatibility version
stopwords - a stopword set
Method Detail


public static CharArraySet getDefaultStopSet()
Returns an unmodifiable instance of the default stop-words set.

an unmodifiable instance of the default stop-words set.


protected Analyzer.TokenStreamComponents createComponents(String fieldName,
                                                          Reader reader)
Specified by:
createComponents in class Analyzer

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