org.apache.lucene.analysis.core

Class StopFilterFactory

java.lang.Object

org.apache.lucene.analysis.util.AbstractAnalysisFactory

org.apache.lucene.analysis.util.TokenFilterFactory

org.apache.lucene.analysis.en.AbstractWordsFileFilterFactory

org.apache.lucene.analysis.core.StopFilterFactory

All Implemented Interfaces:

ResourceLoaderAware

public class StopFilterFactory
extends AbstractWordsFileFilterFactory

Factory for StopFilter.

 <fieldType name="text_stop" class="solr.TextField" positionIncrementGap="100" autoGeneratePhraseQueries="true">
   <analyzer>
     <tokenizer class="solr.WhitespaceTokenizerFactory"/>
     <filter class="solr.StopFilterFactory" ignoreCase="true"
             words="stopwords.txt" format="wordset"
   </analyzer>
 </fieldType>

All attributes are optional:

• ignoreCase defaults to false
• words should be the name of a stopwords file to parse, if not specified the factory will use EnglishAnalyzer.ENGLISH_STOP_WORDS_SET
• format defines how the words file will be parsed, and defaults to wordset. If words is not specified, then format must not be specified.

The valid values for the format option are:

• wordset - This is the default format, which supports one word per line (including any intra-word whitespace) and allows whole line comments beginning with the "#" character. Blank lines are ignored. See WordlistLoader.getLines for details.
• snowball - This format allows for multiple words specified on each line, and trailing comments may be specified using the vertical line ("|"). Blank lines are ignored. See WordlistLoader.getSnowballWordSet for details.

Since:

3.1

SPI Name (Note: This is case-insensitive. e.g., if the name is 'htmlStrip', 'htmlstrip' can be used when looking up the service):

"stop"

Field Summary

Fields

Modifier and Type	Field and Description
static String	NAME SPI name

Fields inherited from class org.apache.lucene.analysis.en.AbstractWordsFileFilterFactory

FORMAT_SNOWBALL, FORMAT_WORDSET

Fields inherited from class org.apache.lucene.analysis.util.AbstractAnalysisFactory

LUCENE_MATCH_VERSION_PARAM, luceneMatchVersion

Constructor Summary

Constructors

Constructor and Description
StopFilterFactory(Map<String,String> args) Creates a new StopFilterFactory

Method Summary

Modifier and Type	Method and Description
TokenStream	create(TokenStream input) Transform the specified input TokenStream
protected CharArraySet	createDefaultWords() Default word set implementation.
CharArraySet	getStopWords()

Methods inherited from class org.apache.lucene.analysis.en.AbstractWordsFileFilterFactory

getFormat, getWordFiles, getWords, inform, isIgnoreCase

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

availableTokenFilters, findSPIName, forName, lookupClass, normalize, reloadTokenFilters

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

get, get, get, get, get, getBoolean, getChar, getClassArg, getFloat, getInt, getLines, getLuceneMatchVersion, getOriginalArgs, getPattern, getSet, getSnowballWordSet, getWordSet, isExplicitLuceneMatchVersion, require, require, require, requireBoolean, requireChar, requireFloat, requireInt, setExplicitLuceneMatchVersion, splitAt, splitFileNames

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NAME

public static final String NAME

SPI name

See Also:

Constant Field Values

Constructor Detail

StopFilterFactory

public StopFilterFactory(Map<String,String> args)

Creates a new StopFilterFactory

Method Detail

getStopWords

public CharArraySet getStopWords()

createDefaultWords

protected CharArraySet createDefaultWords()

Description copied from class: AbstractWordsFileFilterFactory

Default word set implementation.

Specified by:

createDefaultWords in class AbstractWordsFileFilterFactory

create

public TokenStream create(TokenStream input)

Description copied from class: TokenFilterFactory

Transform the specified input TokenStream

Specified by:

create in class TokenFilterFactory