subclasstest.java

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//$Id: SubclassTest.java,v 1.2 2005/02/25 12:44:44 maxcsaucdk Exp $
package org.hibernate.test.metadata.inheritance;

import java.util.List;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.test.metadata.TestCase;
import org.hibernate.test.metadata.Plane;
import org.hibernate.test.metadata.A320;
import org.hibernate.test.metadata.A320b;

/**
 * @author Emmanuel Bernard
 */
public class SubclassTest extends TestCase {

	public SubclassTest(String x) {
		super(x);
	}
	
	public void testPolymorphism() throws Exception {
		Session s = openSession();
		Transaction tx = s.beginTransaction();
		Plane p = new Plane();
		p.setNbrofSeats(10);
		A320 a = new A320();
		a.setJavaEmbeddedVersion("5.0");
		a.setNbrofSeats(300);
		s.persist(a);
		s.persist(p);
		tx.commit();
		s.close();
		
		s = openSession();
		tx = s.beginTransaction();
		Query q = s.createQuery("from " + A320.class.getName() );
		List a320s = q.list();
		assertNotNull(a320s);
		assertEquals( 1, a320s.size() );
		assertTrue(a320s.get(0) instanceof A320);
		assertEquals( "5.0", ( (A320) a320s.get(0) ).getJavaEmbeddedVersion());
		q = s.createQuery("from " + Plane.class.getName() );
		List planes = q.list();
		assertNotNull(planes);
		assertEquals( 2, planes.size() );
		tx.commit();
		s.close();
	}
	public void test2ndLevelSubClass() throws Exception {
		Session s = openSession();
		Transaction tx = s.beginTransaction();
		A320b a = new A320b();
		a.setJavaEmbeddedVersion("Elephant");
		a.setNbrofSeats(300);
		s.persist(a);
		tx.commit();
		s.close();
		
		s = openSession();
		tx = s.beginTransaction();
		Query q = s.createQuery("from " + A320.class.getName() + " as a where a.javaEmbeddedVersion = :version");
		q.setString("version", "Elephant");
		List a320s = q.list();
		assertNotNull(a320s);
		assertEquals( 1, a320s.size() );
		tx.commit();
		s.close();
	}
	
	public void testInheritedAttributes() throws Exception {
		Session s = openSession();
		Transaction tx = s.beginTransaction();
		Plane p = new Plane();
		p.setAltitude(10000);
		p.setMetricAltitude(3000);
		p.setNbrofSeats(150);
		s.persist(p);
		tx.commit();
		s.close();
		
		s = openSession();
		tx = s.beginTransaction();
		p = (Plane) s.get( Plane.class, p.getId() );
		assertNotNull(p);
		assertEquals( 150, p.getNbrofSeats() );
		assertEquals( 10000, p.getAltitude() );
		assertFalse( 3000 == p.getMetricAltitude() );
		tx.commit();
		s.close();
	}

	public void testDefault() throws Exception {
		Session s;
		Transaction tx;
		s = openSession();
		tx = s.beginTransaction();
		Fruit f = new Fruit();
		Apple a = new Apple();
		s.persist(f);
		s.persist(a);
		tx.commit();
		s.close();

		s = openSession();
		tx = s.beginTransaction();
		List result = s.createCriteria(Fruit.class).list();
		assertNotNull(result);
		assertEquals( 2, result.size() );
		Fruit f2 = (Fruit) result.get(0);
		checkClassType(f2, f, a);
		f2 = (Fruit) result.get(1);
		checkClassType(f2, f, a);
		tx.commit();
		s.close();
	}

	private void checkClassType(Fruit fruitToTest, Fruit f, Apple a) {
		if ( fruitToTest.getId().equals( f.getId() ) ) {
			assertFalse(fruitToTest instanceof Apple);
		} else if ( fruitToTest.getId().equals( a.getId() ) ) {
			assertTrue(fruitToTest instanceof Apple);
		} else {
			fail("Result does not contains the previously inserted elements");
		}
	}

	/**
	 * @see org.hibernate.test.metadata.TestCase#getMappings()
	 */
	protected Class[] getMappings() {
		return new Class[] {
			Plane.class,
			A320.class,
			A320b.class,
			Fruit.class,
			Apple.class
		};
	}

}