public void initData() {
// Revision 1
EntityManager em = getEntityManager();
em.getTransaction().begin();
StrTestEntity ste1 = new StrTestEntity();
ste1.setStr("str1");
StrTestEntity ste2 = new StrTestEntity();
ste2.setStr("str2");
em.persist(ste1);
em.persist(ste2);
em.getTransaction().commit();
// Revision 2
em = getEntityManager();
em.getTransaction().begin();
ManyToOneComponentTestEntity mtocte1 = new ManyToOneComponentTestEntity(new ManyToOneComponent(ste1, "data1"));
em.persist(mtocte1);
em.getTransaction().commit();
// Revision 3
em = getEntityManager();
em.getTransaction().begin();
mtocte1 = em.find(ManyToOneComponentTestEntity.class, mtocte1.getId());
mtocte1.getComp1().setEntity(ste2);
em.getTransaction().commit();
mtocte_id1 = mtocte1.getId();
ste_id1 = ste1.getId();
ste_id2 = ste2.getId();
}