package org.hibernate.search.query.dsl.impl;
import java.util.List;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermRangeQuery;
import org.hibernate.annotations.common.AssertionFailure;
import org.hibernate.search.engine.DocumentBuilderIndexedEntity;
import org.hibernate.search.query.dsl.RangeTerminationExcludable;
/**
* @author Emmanuel Bernard
*/
public class ConnectedMultiFieldsRangeQueryBuilder implements RangeTerminationExcludable {
private final RangeQueryContext rangeContext;
private final QueryCustomizer queryCustomizer;
private final List<FieldContext> fieldContexts;
private final QueryBuildingContext queryContext;
public ConnectedMultiFieldsRangeQueryBuilder(RangeQueryContext rangeContext,
QueryCustomizer queryCustomizer, List<FieldContext> fieldContexts,
QueryBuildingContext queryContext) {
this.rangeContext = rangeContext;
this.queryCustomizer = queryCustomizer;
this.fieldContexts = fieldContexts;
this.queryContext = queryContext;
}
public RangeTerminationExcludable excludeLimit() {
if ( rangeContext.getFrom() != null && rangeContext.getTo() != null ) {
rangeContext.setExcludeTo( true );
}
else if ( rangeContext.getFrom() != null ) {
rangeContext.setExcludeTo( true );
}
else if ( rangeContext.getTo() != null ) {
rangeContext.setExcludeTo( true );
}
else {
throw new AssertionFailure( "Both from and to clause of a range query are null" );
}
return this;
}
public Query createQuery() {
final int size = fieldContexts.size();
if ( size == 1 ) {
return queryCustomizer.setWrappedQuery( createQuery( fieldContexts.get( 0 ) ) ).createQuery();
}
else {
BooleanQuery aggregatedFieldsQuery = new BooleanQuery( );
for ( FieldContext fieldContext : fieldContexts ) {
aggregatedFieldsQuery.add( createQuery( fieldContext ), BooleanClause.Occur.SHOULD );
}
return queryCustomizer.setWrappedQuery( aggregatedFieldsQuery ).createQuery();
}
}
public Query createQuery(FieldContext fieldContext) {
final Query perFieldQuery;
final String fieldName = fieldContext.getField();
final Analyzer queryAnalyzer = queryContext.getQueryAnalyzer();
final DocumentBuilderIndexedEntity<?> documentBuilder = Helper.getDocumentBuilder( queryContext );
final Object fromObject = rangeContext.getFrom();
final String fromString = fieldContext.isIgnoreFieldBridge() ?
fromObject == null ? null : fromObject.toString() :
documentBuilder.objectToString( fieldName, fromObject );
final String lowerTerm = fromString == null ?
null :
Helper.getAnalyzedTerm( fieldName, fromString, "from", queryAnalyzer, fieldContext );
final Object toObject = rangeContext.getTo();
final String toString = fieldContext.isIgnoreFieldBridge() ?
toObject == null ? null : toObject.toString() :
documentBuilder.objectToString( fieldName, toObject );
final String upperTerm = toString == null ?
null :
Helper.getAnalyzedTerm( fieldName, toString, "to", queryAnalyzer, fieldContext );
perFieldQuery = new TermRangeQuery(
fieldName,
lowerTerm,
upperTerm,
!rangeContext.isExcludeFrom(),
!rangeContext.isExcludeTo()
);
return fieldContext.getFieldCustomizer().setWrappedQuery( perFieldQuery ).createQuery();
}
}