/*
* 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.subquery;
import javax.persistence.EntityManager;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Join;
import javax.persistence.criteria.Root;
import javax.persistence.criteria.Subquery;
import org.hibernate.ejb.metamodel.AbstractMetamodelSpecificTest;
import org.hibernate.ejb.metamodel.Customer;
import org.hibernate.ejb.metamodel.Customer_;
import org.hibernate.ejb.metamodel.Order;
import org.hibernate.ejb.metamodel.Order_;
/**
* TODO : javadoc
*
* @author Steve Ebersole
*/
public class UncorrelatedSubqueryTest extends AbstractMetamodelSpecificTest {
public void testEqualAll() {
CriteriaBuilder builder = factory.getCriteriaBuilder();
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
CriteriaQuery<Customer> criteria = builder.createQuery( Customer.class );
Root<Customer> customerRoot = criteria.from( Customer.class );
Join<Customer, Order> orderJoin = customerRoot.join( Customer_.orders );
criteria.select( customerRoot );
Subquery<Double> subCriteria = criteria.subquery( Double.class );
Root<Order> subqueryOrderRoot = subCriteria.from( Order.class );
subCriteria.select( builder.min( subqueryOrderRoot.get( Order_.totalPrice ) ) );
criteria.where( builder.equal( orderJoin.get( "totalPrice" ), builder.all( subCriteria ) ) );
em.createQuery( criteria ).getResultList();
em.getTransaction().commit();
em.close();
}
}