org.apache.lucene.analysis.standard
Class StandardAnalyzer

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

public final class StandardAnalyzer
extends StopwordAnalyzerBase

Filters StandardTokenizer with StandardFilter, LowerCaseFilter and StopFilter, using a list of English stop words.

You must specify the required Version compatibility when creating StandardAnalyzer:


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 int DEFAULT_MAX_TOKEN_LENGTH
          Default maximum allowed token length
static CharArraySet STOP_WORDS_SET
          An unmodifiable set containing some common English words that are usually not useful for searching.
 
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
StandardAnalyzer(Version matchVersion)
          Builds an analyzer with the default stop words (STOP_WORDS_SET).
StandardAnalyzer(Version matchVersion, CharArraySet stopWords)
          Builds an analyzer with the given stop words.
StandardAnalyzer(Version matchVersion, Reader stopwords)
          Builds an analyzer with the stop words from the given reader.
 
Method Summary
protected  Analyzer.TokenStreamComponents createComponents(String fieldName, Reader reader)
           
 int getMaxTokenLength()
           
 void setMaxTokenLength(int length)
          Set maximum allowed token length.
 
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_MAX_TOKEN_LENGTH

public static final int DEFAULT_MAX_TOKEN_LENGTH
Default maximum allowed token length

See Also:
Constant Field Values

STOP_WORDS_SET

public static final CharArraySet STOP_WORDS_SET
An unmodifiable set containing some common English words that are usually not useful for searching.

Constructor Detail

StandardAnalyzer

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

Parameters:
matchVersion - Lucene version to match See above
stopWords - stop words

StandardAnalyzer

public StandardAnalyzer(Version matchVersion)
Builds an analyzer with the default stop words (STOP_WORDS_SET).

Parameters:
matchVersion - Lucene version to match See above

StandardAnalyzer

public StandardAnalyzer(Version matchVersion,
                        Reader stopwords)
                 throws IOException
Builds an analyzer with the stop words from the given reader.

Parameters:
matchVersion - Lucene version to match See above
stopwords - Reader to read stop words from
Throws:
IOException
See Also:
WordlistLoader.getWordSet(Reader, Version)
Method Detail

setMaxTokenLength

public void setMaxTokenLength(int length)
Set maximum allowed token length. If a token is seen that exceeds this length then it is discarded. This setting only takes effect the next time tokenStream or tokenStream is called.


getMaxTokenLength

public int getMaxTokenLength()
See Also:
setMaxTokenLength(int)

createComponents

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


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