/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat, Inc. and/or its affiliates or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat, Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
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.bridge.FieldBridge;
import org.hibernate.search.bridge.builtin.NumericFieldBridge;
import org.hibernate.search.bridge.spi.ConversionContext;
import org.hibernate.search.bridge.util.impl.ContextualExceptionBridgeHelper;
import org.hibernate.search.bridge.util.impl.NumericFieldUtils;
import org.hibernate.search.engine.spi.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;
}
@Override
public RangeTerminationExcludable excludeLimit() {
if ( rangeContext.getFrom() != null && rangeContext.getTo() != null ) {
rangeContext.setExcludeTo( true );
}
else if ( rangeContext.getFrom() != null ) {
rangeContext.setExcludeFrom( 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;
}
@Override
public Query createQuery() {
final int size = fieldContexts.size();
final ConversionContext conversionContext = new ContextualExceptionBridgeHelper();
if ( size == 1 ) {
return queryCustomizer.setWrappedQuery( createQuery( fieldContexts.get( 0 ), conversionContext ) ).createQuery();
}
else {
BooleanQuery aggregatedFieldsQuery = new BooleanQuery( );
for ( FieldContext fieldContext : fieldContexts ) {
aggregatedFieldsQuery.add( createQuery( fieldContext, conversionContext ), BooleanClause.Occur.SHOULD );
}
return queryCustomizer.setWrappedQuery( aggregatedFieldsQuery ).createQuery();
}
}
private Query createQuery(FieldContext fieldContext, ConversionContext conversionContext) {
Query perFieldQuery;
final String fieldName = fieldContext.getField();
final Analyzer queryAnalyzer = queryContext.getQueryAnalyzer();
final DocumentBuilderIndexedEntity<?> documentBuilder = Helper.getDocumentBuilder( queryContext );
FieldBridge fieldBridge = documentBuilder.getBridge( fieldContext.getField() );
final Object fromObject = rangeContext.getFrom();
final Object toObject = rangeContext.getTo();
if ( fieldBridge != null && NumericFieldBridge.class.isAssignableFrom( fieldBridge.getClass() ) ) {
perFieldQuery = NumericFieldUtils.createNumericRangeQuery(
fieldName,
fromObject,
toObject,
!rangeContext.isExcludeFrom(),
!rangeContext.isExcludeTo()
);
}
else {
final String fromString = fieldContext.isIgnoreFieldBridge() ?
fromObject == null ? null : fromObject.toString() :
documentBuilder.objectToString( fieldName, fromObject, conversionContext );
final String lowerTerm = fromString == null ?
null :
Helper.getAnalyzedTerm( fieldName, fromString, "from", queryAnalyzer, fieldContext );
final String toString = fieldContext.isIgnoreFieldBridge() ?
toObject == null ? null : toObject.toString() :
documentBuilder.objectToString( fieldName, toObject, conversionContext );
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();
}
}