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java.lang.Object org.apache.lucene.util.AttributeSource org.apache.lucene.analysis.TokenStream org.apache.lucene.analysis.TokenFilter org.apache.lucene.analysis.de.GermanStemFilter
public final class GermanStemFilter
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
KeywordMarkerFilter
or a custom TokenFilter
that sets
the KeywordAttribute
before this TokenStream
.
KeywordMarkerFilter
Nested Class Summary |
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Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource |
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org.apache.lucene.util.AttributeSource.AttributeFactory, org.apache.lucene.util.AttributeSource.State |
Field Summary |
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Fields inherited from class org.apache.lucene.analysis.TokenFilter |
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input |
Constructor Summary | |
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GermanStemFilter(org.apache.lucene.analysis.TokenStream in)
Creates a GermanStemFilter instance |
|
GermanStemFilter(org.apache.lucene.analysis.TokenStream in,
Set<?> exclusionSet)
Deprecated. use KeywordAttribute with KeywordMarkerFilter instead. |
Method Summary | |
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boolean |
incrementToken()
|
void |
setExclusionSet(Set<?> exclusionSet)
Deprecated. use KeywordAttribute with KeywordMarkerFilter instead. |
void |
setStemmer(GermanStemmer stemmer)
Set a alternative/custom GermanStemmer for this filter. |
Methods inherited from class org.apache.lucene.analysis.TokenFilter |
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close, end, reset |
Methods inherited from class org.apache.lucene.util.AttributeSource |
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addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, restoreState, toString |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public GermanStemFilter(org.apache.lucene.analysis.TokenStream in)
GermanStemFilter
instance
in
- the source TokenStream
@Deprecated public GermanStemFilter(org.apache.lucene.analysis.TokenStream in, Set<?> exclusionSet)
KeywordAttribute
with KeywordMarkerFilter
instead.
Method Detail |
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public boolean incrementToken() throws IOException
incrementToken
in class org.apache.lucene.analysis.TokenStream
IOException
public void setStemmer(GermanStemmer stemmer)
GermanStemmer
for this filter.
@Deprecated public void setExclusionSet(Set<?> exclusionSet)
KeywordAttribute
with KeywordMarkerFilter
instead.
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