Session.get with FetchMode

rlogiacco · **Posted:** Thu Jul 31, 2008 7:38 am

Is possible to execute something like:

session.get(myObjId, FETCH_JOIN_ALL) ?

I was trying something like

Criteria criteria = session.createCriteria(myClass);

// for each collection property
criteria.setFetchMode(property, FetchMode_JOIN);

what I miss now is how can I set the identifing property without knowing the property name....as I already do with session.get()

I've found I can ask the Persister, but I cannot access the persister from session interface...

I think it would be useful to have something like the session.get method I suggested or something like

session.get(myObjId, StringArrayOfPropertiesYouWantToFetch)

I can understand why this method is not in the hibernate core, but I wish to add this on our framework....

Hibernate version: 3.2.4sp1

Cameron McKenzie · **Posted:** Thu Jul 31, 2008 4:39 pm

I think you'll find that there are lots of classes and methods in the Hibernate Criteria API that allow you to do just that.

The Example object is great. Rather than they 'array of properties' you just initialize properties of an example instance of the POJO you're after, and create a Criterion out of it. It's so easy!

How to Use the Hibernate Criteria API: A Simple Tutorial

Code:

public static void main(String[] args) {
  User user = new User();
  user.setEmailAddress(".com");
  Example example = Example.create(user);
  example.enableLike(MatchMode.END);
  Session session = HibernateUtil.beginTransaction();
  Criteria criteria = session.createCriteria(User.class);
  criteria.add(example);  List results = criteria.list();
  for (int i = 0; i<results.size(); i++) {
    System.out.println(results.get(i).toString());
  }
  HibernateUtil.commitTransaction();
}

Code:

public static void main(String args[]) {
  Session session = HibernateUtil.beginTransaction();
  Criterion c1 = Restrictions.gt("id", (long)2);
  Criterion c2 = Restrictions.lt("id", (long)8);
  Criterion c3 = Restrictions.isNotNull("emailAddress");
  User user = new User();
  user.setEmailAddress(".com");
  Example c4 = Example.create(user);
  c4.enableLike(MatchMode.END);
  c4.ignoreCase();
  Criteria criteria = session.createCriteria(User.class);
  criteria.add(c1);
  criteria.add(c2);
  criteria.add(c3);
  criteria.add(c4);
  List results = criteria.list();
  HibernateUtil.commitTransaction();
  for (int i = 0; i<results.size(); i++) {
    System.out.println(results.get(i).toString());
  }
}