/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
*/
package org.hibernate.jpa.test.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.jpa.test.metamodel.AbstractMetamodelSpecificTest;
import org.hibernate.jpa.test.metamodel.LineItem;
import org.hibernate.jpa.test.metamodel.LineItem_;
import org.hibernate.jpa.test.metamodel.Order;
import org.hibernate.jpa.test.metamodel.Order_;
import org.junit.Test;
/**
* @author Steve Ebersole
*/
public class ImplicitJoinTest extends AbstractMetamodelSpecificTest {
@Test
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();
}
}