org.apache.lucene.analysis.cjk
Class CJKAnalyzer

java.lang.Object
  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:
Closeable

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
static String DEFAULT_STOPWORD_FILE
          File containing default CJK 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
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, 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 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

CJKAnalyzer

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


CJKAnalyzer

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

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

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,
                                                          Reader reader)
Specified by:
createComponents in class Analyzer


Copyright © 2000-2013 Apache Software Foundation. All Rights Reserved.