private void addEmailToPerson(Long personId, String emailAddress) {
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
Person aPerson = (Person) session.load(Person.class, personId);
// The getEmailAddresses() might trigger a lazy load of the collection
aPerson.getEmailAddresses().add(emailAddress);
session.getTransaction().commit();
}
private Long createAndStorePerson(String firstname, String lastname) {
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
Person thePerson = new Person();
thePerson.setFirstname(firstname);
thePerson.setLastname(lastname);
session.save(thePerson);
session.getTransaction().commit();
return thePerson.getId();
}
private void addPersonToEvent(Long personId, Long eventId) {
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
session.beginTransaction();
Person aPerson =
(Person)
session
.createQuery("select p from Person p left join fetch p.events where p.id = :pid")
.setParameter("pid", personId)
.uniqueResult(); // Eager fetch the collection so we can use it detached
Event anEvent = (Event) session.load(Event.class, eventId);
// If we want to handle it bidirectional and detached, we also need to load this
// collection with an eager outer-join fetch, this time with Criteria and not HQL:
/*
Event anEvent = (Event) session
.createCriteria(Event.class).setFetchMode("participants", FetchMode.JOIN)
.add( Expression.eq("id", eventId) )
.uniqueResult(); // Eager fetch the colleciton so we can use it detached
*/
session.getTransaction().commit();
// End of first unit of work
aPerson.getEvents().add(anEvent); // aPerson is detached
// or bidirectional safety method, setting both sides: aPerson.addToEvent(anEvent);
// Begin second unit of work
Session session2 = HibernateUtil.getSessionFactory().getCurrentSession();
session2.beginTransaction();
session2.update(aPerson); // Reattachment of aPerson
session2.getTransaction().commit();
}