Package org.apache.lucene.analysis.en
Class KStemFilter
java.lang.Object
org.apache.lucene.util.AttributeSource
org.apache.lucene.analysis.TokenStream
org.apache.lucene.analysis.TokenFilter
org.apache.lucene.analysis.en.KStemFilter
- All Implemented Interfaces:
Closeable
,AutoCloseable
,Unwrappable<TokenStream>
A high-performance kstem filter for english.
See "Viewing Morphology as an Inference Process" (Krovetz, R., Proceedings of the Sixteenth Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, 191-203, 1993).
All terms must already be lowercased for this filter to work correctly.
Note: This filter is aware of the KeywordAttribute
. To prevent certain terms from
being passed to the stemmer KeywordAttribute.isKeyword()
should be set to true
in a previous TokenStream
.
Note: For including the original term as well as the stemmed version, see KeywordRepeatFilterFactory
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Nested Class Summary
Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource
AttributeSource.State
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Field Summary
Fields inherited from class org.apache.lucene.analysis.TokenFilter
input
Fields inherited from class org.apache.lucene.analysis.TokenStream
DEFAULT_TOKEN_ATTRIBUTE_FACTORY
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionboolean
Returns the next, stemmed, input Token.Methods inherited from class org.apache.lucene.analysis.TokenFilter
close, end, reset, unwrap
Methods inherited from class org.apache.lucene.util.AttributeSource
addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, endAttributes, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, removeAllAttributes, restoreState, toString
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Constructor Details
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KStemFilter
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Method Details
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incrementToken
Returns the next, stemmed, input Token.- Specified by:
incrementToken
in classTokenStream
- Returns:
- The stemmed form of a token.
- Throws:
IOException
- If there is a low-level I/O error.
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