org.apache.lucene.analysis.miscellaneous

Class KeepWordFilter

java.lang.Object

org.apache.lucene.util.AttributeSource

org.apache.lucene.analysis.TokenStream

org.apache.lucene.analysis.TokenFilter

org.apache.lucene.analysis.util.FilteringTokenFilter

org.apache.lucene.analysis.miscellaneous.KeepWordFilter

All Implemented Interfaces:

Closeable, AutoCloseable

public final class KeepWordFilter
extends FilteringTokenFilter

A TokenFilter that only keeps tokens with text contained in the required words. This filter behaves like the inverse of StopFilter.

Since:

solr 1.3

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 and Description
KeepWordFilter(TokenStream in, CharArraySet words) Create a new KeepWordFilter.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	accept() Override this method and return if the current input token should be returned by FilteringTokenFilter.incrementToken().

Methods inherited from class org.apache.lucene.analysis.util.FilteringTokenFilter

end, incrementToken, reset

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

close

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

KeepWordFilter

public KeepWordFilter(TokenStream in,
              CharArraySet words)

Create a new KeepWordFilter.

NOTE: The words set passed to this constructor will be directly used by this filter and should not be modified.

Parameters:

in - the TokenStream to consume

words - the words to keep

Method Detail

accept

public boolean accept()

Description copied from class: FilteringTokenFilter

Override this method and return if the current input token should be returned by FilteringTokenFilter.incrementToken().

Specified by:

accept in class FilteringTokenFilter