Hibernate version:
3.1a

I used to have the following in 2.1.8, but it's broken for 3.1, anyone has something similar? I cant even find how to get an EntityPersister (which looks like it should replace the Persister below). In sessionImplementor.getEntityPersister(string, object), what is the string attribute supposed to be? The documentation is rather poor.

/**
* Save the given object if new or update it if it has already been
* persisted (meaning if a record with the same identifier already
* exists).
*
* @param object the object to be saved or updated.
* @throws HibernateException
*/
public void saveOrUpdate(Object object) throws HibernateException {
boolean entityLoaded = false;
ClassPersister cp = ((SessionImplementor) this.session).getPersister(object);
Serializable id = cp.getIdentifier(object);
if(id != null && !"-1".equals(id.toString())){
Key objectKey = new Key(id, cp);
entityLoaded = ((SessionImplementor) this.session).getEntity(objectKey) != null;
// if the persisted version (an object with the same identifier)
// already exists in the session, update it using saveOrUpdateCopy
// (otherwise an exception will be thrown)
if (entityLoaded) {
log.debug("Saving transient object: "+object);
object = this.session.saveOrUpdateCopy(object);
}
// safe to use saveOrUpdate, no object with the same
// identifier exists in this session
else {
log.debug("Saving local object: "+object);
this.session.saveOrUpdate(object);
}
}else{
log.debug("Saving new object: "+object);
Serializable ids = this.session.save(object);
log.debug("Saved new object: "+object+", with id"+ids);
}

this.session.flush();
log.debug("Saved");
}

I just want to port the following lines in 3.1:

Why did you ignore the documentation and use 3.1 _alpha_ if you don't use EJB3 previews?