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java.lang.Objectorg.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 |
|---|
| Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource |
|---|
org.apache.lucene.util.AttributeSource.AttributeFactory, org.apache.lucene.util.AttributeSource.State |
| Field Summary |
|---|
| Fields inherited from class org.apache.lucene.analysis.TokenFilter |
|---|
input |
| Constructor Summary | |
|---|---|
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 | |
|---|---|
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 |
|---|
close, end, reset |
| 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 |
| Methods inherited from class java.lang.Object |
|---|
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
| Constructor Detail |
|---|
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 |
|---|
public boolean incrementToken()
throws IOException
incrementToken in class org.apache.lucene.analysis.TokenStreamIOExceptionpublic void setStemmer(GermanStemmer stemmer)
GermanStemmer for this filter.
@Deprecated public void setExclusionSet(Set<?> exclusionSet)
KeywordAttribute with KeywordMarkerFilter instead.
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