Class StandardAnalyzer
java.lang.Object
org.apache.lucene.analysis.Analyzer
org.apache.lucene.analysis.StopwordAnalyzerBase
org.apache.lucene.analysis.standard.StandardAnalyzer
- All Implemented Interfaces:
Closeable,AutoCloseable
Filters
StandardTokenizer with LowerCaseFilter and StopFilter, using a
configurable list of stop words.- Since:
- 3.1
-
Nested Class Summary
Nested classes/interfaces inherited from class org.apache.lucene.analysis.Analyzer
Analyzer.ReuseStrategy, Analyzer.TokenStreamComponents -
Field Summary
FieldsModifier and TypeFieldDescriptionstatic final intDefault maximum allowed token lengthFields inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase
stopwordsFields inherited from class org.apache.lucene.analysis.Analyzer
GLOBAL_REUSE_STRATEGY, PER_FIELD_REUSE_STRATEGY -
Constructor Summary
ConstructorsConstructorDescriptionBuilds an analyzer with no stop words.StandardAnalyzer(Reader stopwords) Builds an analyzer with the stop words from the given reader.StandardAnalyzer(CharArraySet stopWords) Builds an analyzer with the given stop words. -
Method Summary
Modifier and TypeMethodDescriptionprotected Analyzer.TokenStreamComponentscreateComponents(String fieldName) Creates a newAnalyzer.TokenStreamComponentsinstance for this analyzer.intReturns the current maximum token lengthprotected TokenStreamnormalize(String fieldName, TokenStream in) Wrap the givenTokenStreamin order to apply normalization filters.voidsetMaxTokenLength(int length) Set the max allowed token length.Methods inherited from class org.apache.lucene.analysis.StopwordAnalyzerBase
getStopwordSet, loadStopwordSet, loadStopwordSetMethods inherited from class org.apache.lucene.analysis.Analyzer
attributeFactory, close, getOffsetGap, getPositionIncrementGap, getReuseStrategy, initReader, initReaderForNormalization, normalize, tokenStream, tokenStream
-
Field Details
-
DEFAULT_MAX_TOKEN_LENGTH
public static final int DEFAULT_MAX_TOKEN_LENGTHDefault maximum allowed token length- See Also:
-
-
Constructor Details
-
StandardAnalyzer
Builds an analyzer with the given stop words.- Parameters:
stopWords- stop words
-
StandardAnalyzer
public StandardAnalyzer()Builds an analyzer with no stop words. -
StandardAnalyzer
Builds an analyzer with the stop words from the given reader.- Parameters:
stopwords- Reader to read stop words from- Throws:
IOException- See Also:
-
-
Method Details
-
setMaxTokenLength
public void setMaxTokenLength(int length) Set the max allowed token length. Tokens larger than this will be chopped up at this token length and emitted as multiple tokens. If you need to skip such large tokens, you could increase this max length, and then useLengthFilterto remove long tokens. The default isDEFAULT_MAX_TOKEN_LENGTH. -
getMaxTokenLength
public int getMaxTokenLength()Returns the current maximum token length- See Also:
-
createComponents
Description copied from class:AnalyzerCreates a newAnalyzer.TokenStreamComponentsinstance for this analyzer.- Specified by:
createComponentsin classAnalyzer- Parameters:
fieldName- the name of the fields content passed to theAnalyzer.TokenStreamComponentssink as a reader- Returns:
- the
Analyzer.TokenStreamComponentsfor this analyzer.
-
normalize
Description copied from class:AnalyzerWrap the givenTokenStreamin order to apply normalization filters. The default implementation returns theTokenStreamas-is. This is used byAnalyzer.normalize(String, String).
-