/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* JBoss, Home of Professional Open Source
* Copyright 2011 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @authors tag. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* 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,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package org.hibernate.hql.lucene.internal;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.Sort;
import org.apache.lucene.search.SortField;
import org.hibernate.hql.ast.origin.hql.resolve.path.PropertyPath;
import org.hibernate.hql.ast.spi.EntityNamesResolver;
import org.hibernate.hql.ast.spi.SingleEntityQueryBuilder;
import org.hibernate.hql.ast.spi.SingleEntityQueryRendererDelegate;
import org.hibernate.hql.lucene.LuceneQueryParsingResult;
import org.hibernate.hql.lucene.internal.builder.LucenePropertyHelper;
import org.hibernate.search.ProjectionConstants;
import org.hibernate.search.bridge.FieldBridge;
import org.hibernate.search.bridge.builtin.DoubleNumericFieldBridge;
import org.hibernate.search.bridge.builtin.FloatNumericFieldBridge;
import org.hibernate.search.bridge.builtin.IntegerNumericFieldBridge;
import org.hibernate.search.bridge.builtin.LongNumericFieldBridge;
/**
* Renderer delegate which creates Lucene queries targeting a single entity or a projection of the same.
*
* @author Gunnar Morling
*/
public class LuceneQueryRendererDelegate extends SingleEntityQueryRendererDelegate<Query, LuceneQueryParsingResult> {
private final LucenePropertyHelper propertyHelper;
private List<SortField> sortFields;
public LuceneQueryRendererDelegate(EntityNamesResolver entityNames, SingleEntityQueryBuilder<Query> builder, Map<String, Object> namedParameters, LucenePropertyHelper propertyHelper) {
super( entityNames, builder, namedParameters );
this.propertyHelper = propertyHelper;
}
@Override
protected void addSortField(PropertyPath propertyPath, String collationName, boolean isAscending) {
if ( sortFields == null ) {
sortFields = new ArrayList<SortField>( 5 );
}
int sortType = SortField.STRING;
FieldBridge fieldBridge = propertyHelper.getFieldBridge( targetTypeName, propertyPath.getNodeNamesWithoutAlias() );
// Determine sort type based on FieldBridgeType. SortField.BYTE and SortField.SHORT are not covered!
if ( fieldBridge instanceof IntegerNumericFieldBridge ) {
sortType = SortField.INT;
}
else if ( fieldBridge instanceof LongNumericFieldBridge ) {
sortType = SortField.LONG;
}
else if ( fieldBridge instanceof DoubleNumericFieldBridge ) {
sortType = SortField.DOUBLE;
}
else if ( fieldBridge instanceof FloatNumericFieldBridge ) {
sortType = SortField.FLOAT;
}
sortFields.add( new SortField( propertyPath.asStringPathWithoutAlias(), sortType, !isAscending ) );
}
@Override
public LuceneQueryParsingResult getResult() {
Sort sort = null;
if ( sortFields != null ) {
sort = new Sort( sortFields.toArray( new SortField[sortFields.size()] ) );
}
return new LuceneQueryParsingResult( builder.build(), targetTypeName, targetType, projections, sort );
}
@Override
public void setPropertyPath(PropertyPath propertyPath) {
if ( status == Status.DEFINING_SELECT ) {
if ( propertyPath.getNodes().size() == 1 && propertyPath.getNodes().get( 0 ).isAlias() ) {
projections.add( ProjectionConstants.THIS );
}
else {
projections.add( propertyPath.asStringPathWithoutAlias() );
}
}
else {
this.propertyPath = propertyPath;
}
}
}