org.apache.lucene.search.suggest.analyzing

Class SuggestStopFilterFactory

java.lang.Object

org.apache.lucene.analysis.util.AbstractAnalysisFactory

org.apache.lucene.analysis.util.TokenFilterFactory

org.apache.lucene.search.suggest.analyzing.SuggestStopFilterFactory

All Implemented Interfaces:

ResourceLoaderAware

public class SuggestStopFilterFactory
extends TokenFilterFactory
implements ResourceLoaderAware

Factory for SuggestStopFilter.

 <fieldType name="autosuggest" class="solr.TextField" 
            positionIncrementGap="100" autoGeneratePhraseQueries="true">
   <analyzer>
     <tokenizer class="solr.WhitespaceTokenizerFactory"/>
     <filter class="solr.LowerCaseFilterFactory"/>
     <filter class="solr.SuggestStopFilterFactory" 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 StopAnalyzer.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 begining 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.

Field Summary

Fields

Modifier and Type	Field and Description
static String	FORMAT_SNOWBALL multiple words may be specified on each line, trailing comments start with "|"
static String	FORMAT_WORDSET the default format, one word per line, whole line comments start with "#"

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

LUCENE_MATCH_VERSION_PARAM, luceneMatchVersion

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
TokenStream	create(TokenStream input)
CharArraySet	getStopWords() Returns the configured stopword set
void	inform(ResourceLoader loader)
boolean	isIgnoreCase() Whether or not to ignore case

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

availableTokenFilters, forName, lookupClass, 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, splitFileNames

Methods inherited from class java.lang.Object

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

Field Detail

FORMAT_WORDSET

public static final String FORMAT_WORDSET

the default format, one word per line, whole line comments start with "#"

See Also:

Constant Field Values

FORMAT_SNOWBALL

public static final String FORMAT_SNOWBALL

multiple words may be specified on each line, trailing comments start with "|"

See Also:

Constant Field Values

Constructor Detail

SuggestStopFilterFactory

public SuggestStopFilterFactory(Map<String,String> args)

Creates a new StopFilterFactory

Method Detail

inform

public void inform(ResourceLoader loader)
            throws IOException

Specified by:

inform in interface ResourceLoaderAware

Throws:

IOException

isIgnoreCase

public boolean isIgnoreCase()

Whether or not to ignore case

getStopWords

public CharArraySet getStopWords()

Returns the configured stopword set

create

public TokenStream create(TokenStream input)

Specified by:

create in class TokenFilterFactory