Package de.cxp.ocs.elasticsearch.query.builder

Class NgramQueryFactory

java.lang.Object

de.cxp.ocs.elasticsearch.query.builder.NgramQueryFactory

All Implemented Interfaces:

ESQueryFactory

public class NgramQueryFactory
extends Object
implements ESQueryFactory

Builds a multi-match-query that uses the ngram sub-fields to handle decomposition and fuzziness.

Supported QueryBuildingSettings:

• tieBreaker
• multimatch_type
• minShouldMatch
• acceptNoResult: if set to true, no results will be accepted and no further search is done
• allowParallelSpellcheck: run parallel spell-check with this query. If terms could be corrected and 0 results are found, this query is built again with the corrected terms.

Constructor Summary

Constructors

Constructor	Description
NgramQueryFactory()

Method Summary

Modifier and Type	Method	Description
boolean	allowParallelSpellcheckExecution()
protected String	buildNgrams(String searchPhrase)
MasterVariantQuery	createQuery(List<QueryStringTerm> searchTerms)
void	initialize(String name, Map<QueryBuildingSetting,String> settings, Map<String,Float> fieldWeights, FieldConfigAccess fieldConfig)

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.cxp.ocs.spi.search.ESQueryFactory

getName

Constructor Detail

NgramQueryFactory

public NgramQueryFactory()

Method Detail

initialize

public void initialize(String name,
                       Map<QueryBuildingSetting,String> settings,
                       Map<String,Float> fieldWeights,
                       FieldConfigAccess fieldConfig)

Specified by:

initialize in interface ESQueryFactory

createQuery

public MasterVariantQuery createQuery(List<QueryStringTerm> searchTerms)

Specified by:

createQuery in interface ESQueryFactory

buildNgrams

protected String buildNgrams(String searchPhrase)

allowParallelSpellcheckExecution

public boolean allowParallelSpellcheckExecution()

Specified by:

allowParallelSpellcheckExecution in interface ESQueryFactory