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>
public final class GermanStemFilter extends TokenFilter
ATokenFilterthat 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
SetKeywordMarkerFilteror a customTokenFilterthat sets theKeywordAttributebefore thisTokenStream.- See Also:
SetKeywordMarkerFilter
-
-
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
input
-
Fields inherited from class org.apache.lucene.analysis.TokenStream
DEFAULT_TOKEN_ATTRIBUTE_FACTORY
-
-
Constructor Summary
Constructors Constructor Description GermanStemFilter(TokenStream in)Creates aGermanStemFilterinstance
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description booleanincrementToken()voidsetStemmer(GermanStemmer stemmer)Set a alternative/customGermanStemmerfor this filter.-
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
-
-
-
-
Constructor Detail
-
GermanStemFilter
public GermanStemFilter(TokenStream in)
Creates aGermanStemFilterinstance- Parameters:
in- the sourceTokenStream
-
-
Method Detail
-
incrementToken
public boolean incrementToken() throws IOException- Specified by:
incrementTokenin classTokenStream- Returns:
- Returns true for next token in the stream, or false at EOS
- Throws:
IOException
-
setStemmer
public void setStemmer(GermanStemmer stemmer)
Set a alternative/customGermanStemmerfor this filter.
-
-