Package org.apache.lucene.analysis.de
Class GermanStemFilter
java.lang.Object
org.apache.lucene.util.AttributeSource
org.apache.lucene.analysis.TokenStream
org.apache.lucene.analysis.TokenFilter
org.apache.lucene.analysis.de.GermanStemFilter
- All Implemented Interfaces:
Closeable,AutoCloseable,Unwrappable<TokenStream>
A
TokenFilter that stems German words.
It supports a table of words that should not be stemmed at all. The stemmer used can be
changed at runtime after the filter object is created (as long as it is a GermanStemmer).
To prevent terms from being stemmed use an instance of SetKeywordMarkerFilter or a
custom TokenFilter that sets the KeywordAttribute before this TokenStream.
- See Also:
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Nested Class Summary
Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource
AttributeSource.State -
Field Summary
Fields inherited from class org.apache.lucene.analysis.TokenFilter
inputFields inherited from class org.apache.lucene.analysis.TokenStream
DEFAULT_TOKEN_ATTRIBUTE_FACTORY -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionbooleanvoidsetStemmer(org.apache.lucene.analysis.de.GermanStemmer stemmer) Set a alternative/customGermanStemmerfor this filter.Methods inherited from class org.apache.lucene.analysis.TokenFilter
close, end, reset, unwrapMethods 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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GermanStemFilter
Creates aGermanStemFilterinstance- Parameters:
in- the sourceTokenStream
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Method Details
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incrementToken
- Specified by:
incrementTokenin classTokenStream- Returns:
- Returns true for next token in the stream, or false at EOS
- Throws:
IOException
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setStemmer
public void setStemmer(org.apache.lucene.analysis.de.GermanStemmer stemmer) Set a alternative/customGermanStemmerfor this filter.
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