GetReferenceProxyBeingLoadedWhenNotNeeded.java

package br.com.caelum;

import javax.persistence.Entity;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.ManyToOne;
import javax.persistence.Persistence;

import org.hibernate.Hibernate;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

@Entity
class Cat {
	@Id
	@GeneratedValue
	int id;
	@ManyToOne
	Shop shop;
}

@Entity
class Shop {
	@Id
	@GeneratedValue
	int id;
}

public class GetReferenceProxyBeingLoadedWhenNotNeeded {


	private EntityManager em;

	@Before
	public void setUp() {
		EntityManagerFactory factory = Persistence
				.createEntityManagerFactory("jpa2");

		this.em = factory.createEntityManager();

		this.em.getTransaction().begin();
		this.em.persist(new Shop()); // shop of id 1
		this.em.getTransaction().commit();

		this.em = factory.createEntityManager();
	}

	@Test
	public void shouldNotInitilizeGetReferenceProxy() {
		Shop shop = this.em.getReference(Shop.class, 1);

		Cat c = new Cat();
		c.shop = shop;

		this.em.getTransaction().begin();
		this.em.persist(c);
		this.em.getTransaction().commit();

		Assert.assertFalse(Hibernate.isInitialized(shop));
	}

}

getReference now working fine!