/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. 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.ejb.criteria.paths;
import javax.persistence.EntityManager;
import javax.persistence.TypedQuery;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Join;
import javax.persistence.criteria.Root;
import org.hibernate.ejb.metamodel.AbstractMetamodelSpecificTest;
import org.hibernate.ejb.metamodel.LineItem;
import org.hibernate.ejb.metamodel.LineItem_;
import org.hibernate.ejb.metamodel.Order;
import org.hibernate.ejb.metamodel.Order_;
/**
* TODO : javadoc
*
* @author Steve Ebersole
*/
public class ImplicitJoinTest extends AbstractMetamodelSpecificTest {
public void testImplicitJoinFromExplicitCollectionJoin() {
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
CriteriaBuilder criteriaBuilder = em.getCriteriaBuilder();
CriteriaQuery<Order> criteria = criteriaBuilder.createQuery( Order.class );
Root<Order> orderRoot = criteria.from( Order.class );
Join<Order, LineItem> lineItemsJoin = orderRoot.join( Order_.lineItems );
criteria.where( criteriaBuilder.lt( lineItemsJoin.get( LineItem_.quantity ), 2 ) );
criteria.select( orderRoot ).distinct( true );
TypedQuery<Order> query = em.createQuery( criteria );
query.getResultList();
em.getTransaction().commit();
em.close();
}
}