org.apache.lucene.analysis.nl

Class DutchStemFilter

java.lang.Object

org.apache.lucene.util.AttributeSource

org.apache.lucene.analysis.TokenStream

org.apache.lucene.analysis.TokenFilter

org.apache.lucene.analysis.nl.DutchStemFilter

All Implemented Interfaces:

Closeable

Deprecated.

Use SnowballFilter with DutchStemmer instead, which has the same functionality. This filter will be removed in Lucene 5.0

@Deprecated
public final class DutchStemFilter
extends TokenFilter

A TokenFilter that stems Dutch 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 DutchStemmer).

To prevent terms from being stemmed use an instance of KeywordMarkerFilter or a custom TokenFilter that sets the KeywordAttribute before this TokenStream.

See Also:

KeywordMarkerFilter

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource

AttributeSource.AttributeFactory, AttributeSource.State

Field Summary

Fields inherited from class org.apache.lucene.analysis.TokenFilter

input

Constructor Summary

Constructors

Constructor and Description
DutchStemFilter(TokenStream _in) Deprecated.
DutchStemFilter(TokenStream _in, Map<?,?> stemdictionary) Deprecated.
DutchStemFilter(TokenStream _in, Set<?> exclusiontable) Deprecated. use KeywordAttribute with KeywordMarkerFilter instead.
DutchStemFilter(TokenStream _in, Set<?> exclusiontable, Map<?,?> stemdictionary) Deprecated. use KeywordAttribute with KeywordMarkerFilter instead.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	incrementToken() Deprecated. Returns the next token in the stream, or null at EOS
void	setExclusionTable(HashSet<?> exclusiontable) Deprecated. use KeywordAttribute with KeywordMarkerFilter instead.
void	setStemDictionary(HashMap<?,?> dict) Deprecated. Set dictionary for stemming, this dictionary overrules the algorithm, so you can correct for a particular unwanted word-stem pair.
void	setStemmer(DutchStemmer stemmer) Deprecated. Set a alternative/custom DutchStemmer 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

DutchStemFilter

public DutchStemFilter(TokenStream _in)

Deprecated.

DutchStemFilter

@Deprecated
public DutchStemFilter(TokenStream _in,
                          Set<?> exclusiontable)

Deprecated. use KeywordAttribute with KeywordMarkerFilter instead.

Builds a DutchStemFilter that uses an exclusion table.

DutchStemFilter

public DutchStemFilter(TokenStream _in,
               Map<?,?> stemdictionary)

Deprecated.

Parameters:

stemdictionary - Dictionary of word stem pairs, that overrule the algorithm

DutchStemFilter

@Deprecated
public DutchStemFilter(TokenStream _in,
                          Set<?> exclusiontable,
                          Map<?,?> stemdictionary)

Deprecated. use KeywordAttribute with KeywordMarkerFilter instead.

Parameters:

stemdictionary - Dictionary of word stem pairs, that overrule the algorithm

Method Detail

incrementToken

public boolean incrementToken()
                       throws IOException

Deprecated.

Returns the next token in the stream, or null at EOS

Specified by:

incrementToken in class TokenStream

Returns:

false for end of stream; true otherwise

Throws:

IOException

setStemmer

public void setStemmer(DutchStemmer stemmer)

Deprecated.

Set a alternative/custom DutchStemmer for this filter.

setExclusionTable

@Deprecated
public void setExclusionTable(HashSet<?> exclusiontable)

Deprecated. use KeywordAttribute with KeywordMarkerFilter instead.

Set an alternative exclusion list for this filter.

setStemDictionary

public void setStemDictionary(HashMap<?,?> dict)

Deprecated.

Set dictionary for stemming, this dictionary overrules the algorithm, so you can correct for a particular unwanted word-stem pair.