org.apache.lucene.analysis.synonym

Class SynonymFilterFactory

java.lang.Object

org.apache.lucene.analysis.util.AbstractAnalysisFactory

org.apache.lucene.analysis.util.TokenFilterFactory

org.apache.lucene.analysis.synonym.SynonymFilterFactory

All Implemented Interfaces:

ResourceLoaderAware

public class SynonymFilterFactory
extends TokenFilterFactory
implements ResourceLoaderAware

Factory for SynonymFilter.

 <fieldType name="text_synonym" class="solr.TextField" positionIncrementGap="100">
   <analyzer>
     <tokenizer class="solr.WhitespaceTokenizerFactory"/>
     <filter class="solr.SynonymFilterFactory" synonyms="synonyms.txt" 
             format="solr" ignoreCase="false" expand="true" 
             tokenizerFactory="solr.WhitespaceTokenizerFactory"
             [optional tokenizer factory parameters]/>
   </analyzer>
 </fieldType>

An optional param name prefix of "tokenizerFactory." may be used for any init params that the SynonymFilterFactory needs to pass to the specified TokenizerFactory. If the TokenizerFactory expects an init parameters with the same name as an init param used by the SynonymFilterFactory, the prefix is mandatory.

The optional format parameter controls how the synonyms will be parsed: It supports the short names of solr for SolrSynonymParser and wordnet for and WordnetSynonymParser, or your own SynonymMap.Parser class name. The default is solr. A custom SynonymMap.Parser is expected to have a constructor taking:

• boolean dedup - true if duplicates should be ignored, false otherwise
• boolean expand - true if conflation groups should be expanded, false if they are one-directional
• Analyzer analyzer - an analyzer used for each raw synonym

Field Summary

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

LUCENE_MATCH_VERSION_PARAM, luceneMatchVersion

Constructor Summary

Constructors

Constructor and Description
SynonymFilterFactory(Map<String,String> args)

Method Summary

Methods

Modifier and Type	Method and Description
TokenStream	create(TokenStream input) Transform the specified input TokenStream
void	inform(ResourceLoader loader) Initializes this component with the provided ResourceLoader (used for loading classes, files, etc).

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

availableTokenFilters, forName, lookupClass, reloadTokenFilters

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

assureMatchVersion, 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

Constructor Detail

SynonymFilterFactory

public SynonymFilterFactory(Map<String,String> args)

Method Detail

create

public TokenStream create(TokenStream input)

Description copied from class: TokenFilterFactory

Transform the specified input TokenStream

Specified by:

create in class TokenFilterFactory

inform

public void inform(ResourceLoader loader)
            throws IOException

Description copied from interface: ResourceLoaderAware

Initializes this component with the provided ResourceLoader (used for loading classes, files, etc).

Specified by:

inform in interface ResourceLoaderAware

Throws:

IOException