manytoonetest.java

hibernate方便的操作数据库相当不错的 请各位下载看看啊

//$Id: ManyToOneTest.java,v 1.5 2005/02/28 12:11:58 epbernard Exp $
package org.hibernate.test.metadata.manytoone;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import org.hibernate.Hibernate;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.hibernate.Query;
import org.hibernate.test.metadata.TestCase;
import org.hibernate.test.metadata.Flight;
import org.hibernate.test.metadata.Company;
import org.hibernate.test.metadata.Discount;
import org.hibernate.test.metadata.Customer;
import org.hibernate.test.metadata.Ticket;
import org.hibernate.test.metadata.Passport;

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

	public ManyToOneTest(String x) {
		super(x);
	}
	
	public void testCreate() throws Exception {
		Session s;
		Transaction tx;
		s = openSession();
		tx = s.beginTransaction();
		Flight firstOne = new Flight();
		firstOne.setId( new Long(1) );
		firstOne.setName("AF0101");
		Company frenchOne = new Company();
		frenchOne.setName("Air France");
		firstOne.setCompany(frenchOne);
		s.persist(firstOne);
		tx.commit();
		s.close();
		assertNotNull("identity id should work", frenchOne.getId() );
		
		s = openSession();
		tx = s.beginTransaction();
		firstOne = (Flight) s.get(Flight.class, new Long(1));
		assertNotNull(firstOne.getCompany());
		assertEquals(frenchOne.getName(), firstOne.getCompany().getName());
		tx.commit();
		s.close();
	}
	
	public void testCascade() throws Exception {
		Session s;
		Transaction tx;
		s = openSession();
		tx = s.beginTransaction();
		Discount discount = new Discount();
		discount.setDiscount(20.12);
		Customer customer = new Customer();
		Collection discounts = new ArrayList();
		discounts.add(discount);
		customer.setName("Quentin Tarantino");
		discount.setOwner(customer);
		customer.setDiscountTickets(discounts);
		s.persist(discount);
		tx.commit();
		s.close();
		
		s = openSession();
		tx = s.beginTransaction();
		discount = (Discount) s.get( Discount.class, discount.getId() );
		assertNotNull(discount);
		assertEquals( 20.12, discount.getDiscount() );
		assertNotNull( discount.getOwner() );
		customer = new Customer();
		customer.setName("Clooney");
		discount.setOwner(customer);
		discounts = new ArrayList();
		discounts.add(discount);
		customer.setDiscountTickets(discounts);
		tx.commit();
		s.close();
		
		s = openSession();
		tx = s.beginTransaction();
		discount = (Discount) s.get( Discount.class, discount.getId() );
		assertNotNull(discount);
		assertNotNull( discount.getOwner() );
		assertEquals( "Clooney", discount.getOwner().getName() );
		tx.commit();
		s.close();
		
		
	}
	
	public void testFetch() throws Exception {
		Session s;
		Transaction tx;
		s = openSession();
		tx = s.beginTransaction();
		Discount discount = new Discount();
		discount.setDiscount(20);
		Customer customer = new Customer();
		Collection discounts = new ArrayList();
		discounts.add(discount);
		customer.setName("Quentin Tarantino");
		discount.setOwner(customer);
		customer.setDiscountTickets(discounts);
		s.persist(discount);
		tx.commit();
		s.close();
		
		s = openSession();
		tx = s.beginTransaction();
		discount = (Discount) s.get( Discount.class, discount.getId() );
		assertNotNull(discount);
		assertFalse( Hibernate.isInitialized( discount.getOwner() ) );
		tx.commit();
		s.close();
	}

	public void testCompositeFK() throws Exception {
		Session s;
		Transaction tx;
		s = openSession();
		tx = s.beginTransaction();
		ParentPk ppk = new ParentPk();
		ppk.firstName = "John";
		ppk.lastName = "Doe";
		Parent p = new Parent();
		p.age = 45;
		p.id = ppk;
		s.persist(p);
		Child c = new Child();
		c.parent = p;
		s.persist(c);
		tx.commit();
		s.close();

		s = openSession();
		tx = s.beginTransaction();
		//FIXME: fix this when the small parser bug will be fixed 
		Query q = s.createQuery("from " + Child.class.getName() ); //+ " c where c.parent.id.lastName = :lastName");
		//q.setString("lastName", p.id.lastName);
		List result = q.list();
		assertEquals( 1, result.size() );
		Child c2 = (Child) result.get(0);
		assertEquals(c2.id,  c.id);
		tx.commit();
		s.close();
	}

	public void testImplicitCompositeFk() throws Exception {
		Session s;
		Transaction tx;
		s = openSession();
		tx = s.beginTransaction();
		Node n1 = new Node();
		n1.setDescription("Parent");
		NodePk n1pk = new NodePk();
		n1pk.setLevel(1);
		n1pk.setName("Root");
		n1.setId(n1pk);
		Node n2 = new Node();
		NodePk n2pk = new NodePk();
		n2pk.setLevel(2);
		n2pk.setName("Level 1: A");
		n2.setParent(n1);
		n2.setId(n2pk);
		s.persist(n2);
		tx.commit();

		s = openSession();
		tx = s.beginTransaction();
		n2 = (Node) s.get(Node.class, n2pk);
		assertNotNull(n2);
		assertNotNull(n2.getParent());
		assertEquals(1, n2.getParent().getId().getLevel() );
		tx.commit();
		s.close();
	}

	/**
	 * @see org.hibernate.test.metadata.TestCase#getMappings()
	 */
	protected Class[] getMappings() {
		return new Class[] {
			Flight.class,
			Company.class,
			Customer.class,
			Discount.class,
			Ticket.class,
			Passport.class,
			Parent.class,
			Child.class,
			Node.class
		};
	}

}