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
public final class KStemFilter
- extends TokenFilter
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
Method Summary |
boolean |
incrementToken()
Returns the next, stemmed, input Token. |
Methods inherited from class org.apache.lucene.util.AttributeSource |
addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, restoreState, toString |
KStemFilter
public KStemFilter(TokenStream in)
incrementToken
public boolean incrementToken()
throws IOException
- Returns the next, stemmed, input Token.
- Specified by:
incrementToken
in class TokenStream
- Returns:
- The stemmed form of a token.
- Throws:
IOException
- If there is a low-level I/O error.
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