component-lucene-linguistics.xml

<component id="com.yahoo.language.lucene.LuceneLinguistics" bundle="listings-search">  
    <config name="com.yahoo.language.lucene.lucene-analysis">  
        <configDir>analysis-config</configDir>  
        <analysis>  
            <item key="en">  
                <tokenizer>  
                    <name>whitespace</name>  
                </tokenizer>  
                <tokenFilters>  
                    <item>  
                        <name>asciiFolding</name>  
                    </item>  
                    <item>  
                        <name>synonymGraph</name>  
                        <conf>  
                            <item key="synonyms">synonyms.txt</item>  
                            <item key="ignoreCase">true</item>  
                            <item key="expand">true</item>  
                        </conf>  
                    </item>  
                    <item>  
                        <name>stop</name>  
                        <conf>  
                            <item key="words">stopwords.txt</item>  
                            <item key="ignoreCase">true</item>  
                        </conf>  
                    </item>  
                    <item>  
                        <name>wordDelimiterGraph</name>  
                        <conf>  
                            <item key="generateNumberParts">1</item>  
                            <item key="generateNumberParts">1</item>  
                            <item key="catenateWords">1</item>  
                            <item key="catenateNumbers">1</item>  
                            <item key="catenateAll">1</item>  
                            <item key="splitOnCaseChange">0</item>  
                            <item key="splitOnNumerics">1</item>  
                            <item key="stemEnglishPossessive">1</item>  
                            <item key="preserveOriginal">1</item>  
                            <item key="protected">wordDelimiterGraphFilterFactoryProtected.txt</item>  
                        </conf>  
                    </item>  
                    <item>  
                        <name>lowercase</name>  
                    </item>  
                    <item>  
                        <name>lstem</name>  
                    </item>  
                    <item>  
                        <name>removeDuplicates</name>  
                    </item>  
                    <item>  
                        <name>synonymGraph</name>  
                        <conf>  
                            <item key="synonyms">british_synonyms.txt</item>  
                            <item key="ignoreCase">true</item>  
                            <item key="expand">true</item>  
                        </conf>  
                    </item>  
                    <item>  
                        <name>flattenGraph</name>  
                    </item>  
                </tokenFilters>  
            </item>  
        </analysis>  
    </config>  
</component>

Matching.java

public static void addLexicalMatchQuery(
      String query, Query vespaQuery, ListingSearchOptions options, int size, int offset) {
...               
vespaQuery
      .getModel()
      .setDefaultIndex(ListingSchema.FieldSets.Default(options.getTaxonomyHash()));

var queryType =  
    new QueryType(  
        Query.Type.LINGUISTICS,  
        QueryType.Composite.and,  
        QueryType.Tokenization.linguistics,  
        QueryType.Syntax.none);  
vespaQuery.getModel().setType(queryType);  
vespaQuery.getModel().setLanguage(Language.ENGLISH);  
vespaQuery.getModel().setQueryString(query);  
var rankProfile = Optional.ofNullable(options.getVespaRankProfile()).orElse("default");  
vespaQuery.getRanking().setProfile(rankProfile);

VespaQueryGeneratorAndExecutor.java

    Item filterItem = filters.genFilters(vespaQuery, filter, options, exclusionaryFacetFilter);
    Matching.addLexicalMatchQuery(query, vespaQuery, options, size, offset);
    vespaQuery.getModel().getQueryTree().and(filterItem);