Limit records on onetomany relationship in Play! Framework - jpa

Question

I am trying to determine the best way to page/limit the rows returned when querying the children of a OneToMany relationship while using JPA in Play! Framework.
#Entity
public class User extends Model {
#OneToMany(mappedBy="user", cascade=CascadeType.ALL)
public List<CaseFolder> caseFolders;
}
public class CaseFolder extends Model {
#Required
#ManyToOne
public User user;
#Required
public String number;
public String description;
}
I realize I can set the relationship the lazy fetching. However, that still doesn't seem to stop me from retrieving the entire list of CaseFolders when I finally access user.caseFolders.
Ideally, I would like to be able to do something like:
user.getCaseFolders().start(100).limit(10)
but I can't find anything about doing that "out of the box".
Does everyone really bring the entire related data set into memory every time they need a few of the "children" of a 1-m relationship?
I'm implementing a UI that has paging (using jqgrid) and a user can potentially have thousands of records.

Answer 1

After further research, here's the answer I came up with:
The "many" side of the relationship - the collection of all caseFolders - is a property of the User. By definition, that property's value is the entire collection.
To obtain a subset of those elements, I added the following method to my User model:
public List<CaseFolder> getCaseFolders(String sidx, String sord, int start, int limit) {
String orderBy = "c." + sidx + " " + ((sord.toUpperCase().equals("ASC")) ? "ASC" : "DESC");
String jpql = "SELECT c " +
"FROM CaseFolder c " +
"WHERE c.user = :user " +
"ORDER BY " + orderBy;
Query query = JPA.em().createQuery(jpql)
.setParameter("user", this)
.setFirstResult(start)
.setMaxResults(limit);
List<CaseFolder> result = query.getResultList();
return result;
}