package org.hibernate.ejb.criteria.tuple;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.Tuple;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.Root;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Path;
import org.hibernate.ejb.metamodel.AbstractMetamodelSpecificTest;
import org.hibernate.ejb.metamodel.Customer;
import org.hibernate.ejb.metamodel.Customer_;
/**
* @author Emmanuel Bernard
*/
public class TupleCriteriaTest extends AbstractMetamodelSpecificTest {
public void testArray() {
EntityManager em = factory.createEntityManager();
em.getTransaction().begin();
Customer c1 = new Customer();
c1.setId( "c1" );
c1.setAge( 18 );
c1.setName( "Bob" );
em.persist( c1 );
em.getTransaction().commit();
em.close();
em = factory.createEntityManager();
em.getTransaction().begin();
final CriteriaBuilder cb = em.getCriteriaBuilder();
CriteriaQuery<Object[]> q = cb.createQuery(Object[].class);
Root<Customer> c = q.from(Customer.class);
q.select( cb.array( c.get(Customer_.name), c.get(Customer_.age) ) );
List<Object[]> result = em.createQuery(q).getResultList();
assertEquals( 1, result.size() );
assertEquals( c1.getName(), result.get( 0 )[0] );
assertEquals( c1.getAge(), result.get( 0 )[1] );
em.getTransaction().commit();
em.close();
em = factory.createEntityManager();
em.getTransaction().begin();
em.createQuery( "delete Customer" ).executeUpdate();
em.getTransaction().commit();
em.close();
}
public void testTuple() {
EntityManager em = factory.createEntityManager();
em.getTransaction().begin();
Customer c1 = new Customer();
c1.setId( "c1" );
c1.setAge( 18 );
c1.setName( "Bob" );
em.persist( c1 );
em.getTransaction().commit();
em.close();
em = factory.createEntityManager();
em.getTransaction().begin();
final CriteriaBuilder builder = em.getCriteriaBuilder();
CriteriaQuery<Tuple> criteria = builder.createTupleQuery();
Root<Customer> customerRoot = criteria.from( Customer.class );
Path<String> namePath = customerRoot.get( Customer_.name );
Path<Integer> agePath = customerRoot.get( Customer_.age );
agePath.alias( "age" );
criteria.multiselect( namePath, agePath );
List<Tuple> results = em.createQuery( criteria ).getResultList();
assertEquals( 1, results.size() );
Object resultElement = results.get( 0 );
assertTrue( "Check result 'row' as Tuple", Tuple.class.isInstance( resultElement ) );
Tuple resultElementTuple = (Tuple) resultElement;
Object[] tupleArray = resultElementTuple.toArray();
assertEquals( 2, tupleArray.length );
assertEquals( tupleArray[0], resultElementTuple.get( 0 ) );
assertEquals( resultElementTuple.get( namePath ), resultElementTuple.get( 0 ) );
assertEquals( tupleArray[1], resultElementTuple.get( 1 ) );
assertEquals( resultElementTuple.get( agePath ), resultElementTuple.get( 1 ) );
assertEquals( resultElementTuple.get( agePath ), resultElementTuple.get( "age" ) );
em.getTransaction().commit();
em.close();
em = factory.createEntityManager();
em.getTransaction().begin();
em.createQuery( "delete Customer" ).executeUpdate();
em.getTransaction().commit();
em.close();
}
}