/*
* 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 java.util.List;
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 javax.persistence.criteria.Subquery;
import org.hibernate.dialect.SybaseASE15Dialect;
import org.hibernate.ejb.metamodel.AbstractMetamodelSpecificTest;
import org.hibernate.ejb.metamodel.Customer;
import org.hibernate.ejb.metamodel.Customer_;
import org.hibernate.ejb.metamodel.LineItem;
import org.hibernate.ejb.metamodel.LineItem_;
import org.hibernate.ejb.metamodel.Order;
import org.hibernate.ejb.metamodel.Order_;
import org.hibernate.testing.junit.SkipForDialect;
/**
* TODO : javadoc
*
* @author Steve Ebersole
*/
public class CorrelatedSubqueryTest extends AbstractMetamodelSpecificTest {
public void testBasicCorrelation() {
CriteriaBuilder builder = factory.getCriteriaBuilder();
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
CriteriaQuery<Customer> criteria = builder.createQuery( Customer.class );
Root<Customer> customer = criteria.from( Customer.class );
criteria.select( customer );
Subquery<Order> orderSubquery = criteria.subquery( Order.class );
Root<Customer> customerCorrelationRoot = orderSubquery.correlate( customer );
Join<Customer, Order> customerOrderCorrelationJoin = customerCorrelationRoot.join( Customer_.orders );
orderSubquery.select( customerOrderCorrelationJoin );
criteria.where( builder.not( builder.exists( orderSubquery ) ) );
em.createQuery( criteria ).getResultList();
em.getTransaction().commit();
em.close();
}
public void testRestrictedCorrelation() {
CriteriaBuilder builder = factory.getCriteriaBuilder();
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
CriteriaQuery<Order> criteria = builder.createQuery( Order.class );
Root<Order> orderRoot = criteria.from( Order.class );
criteria.select( orderRoot );
// create correlated subquery
Subquery<Customer> customerSubquery = criteria.subquery( Customer.class );
Root<Order> orderRootCorrelation = customerSubquery.correlate( orderRoot );
Join<Order, Customer> orderCustomerJoin = orderRootCorrelation.join( Order_.customer );
customerSubquery.where( builder.like( orderCustomerJoin.get( Customer_.name ), "%Caruso" ) )
.select( orderCustomerJoin );
criteria.where( builder.exists( customerSubquery ) );
em.createQuery( criteria ).getResultList();
em.getTransaction().commit();
em.close();
}
@SkipForDialect(value=SybaseASE15Dialect.class, jiraKey="HHH-3032")
public void testCorrelationExplicitSelectionCorrelation() {
CriteriaBuilder builder = factory.getCriteriaBuilder();
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
CriteriaQuery<Customer> customerCriteria = builder.createQuery( Customer.class );
Root<Customer> customer = customerCriteria.from( Customer.class );
Join<Customer, Order> o = customer.join( Customer_.orders );
Subquery<Order> sq = customerCriteria.subquery(Order.class);
Join<Customer, Order> sqo = sq.correlate(o);
Join<Order, LineItem> sql = sqo.join(Order_.lineItems);
sq.where( builder.gt(sql.get( LineItem_.quantity), 3) );
// use the correlation itself as the subquery selection (initially caused problems wrt aliases)
sq.select(sqo);
customerCriteria.select(customer).distinct(true);
customerCriteria.where(builder.exists(sq));
em.createQuery( customerCriteria ).getResultList();
em.getTransaction().commit();
em.close();
}
public void testRestrictedCorrelationNoExplicitSelection() {
CriteriaBuilder builder = factory.getCriteriaBuilder();
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
CriteriaQuery<Order> criteria = builder.createQuery( Order.class );
Root<Order> orderRoot = criteria.from( Order.class );
criteria.select( orderRoot );
// create correlated subquery
Subquery<Customer> customerSubquery = criteria.subquery( Customer.class );
Root<Order> orderRootCorrelation = customerSubquery.correlate( orderRoot );
Join<Order, Customer> orderCustomerJoin = orderRootCorrelation.join( "customer" );
customerSubquery.where( builder.like( orderCustomerJoin.<String>get( "name" ), "%Caruso" ) );
criteria.where( builder.exists( customerSubquery ) );
em.createQuery( criteria ).getResultList();
em.getTransaction().commit();
em.close();
}
}