In my DAO class, I have the following code to execute HQL selection query

String hql = "SELECT id FROM MyBean WHERE name = 'foo'";
List<Integer> queryResults =
    session.createSelectionQuery(hql, Integer.class).setFirstResult(0).setMaxResults(2).list();

When this query is invoked, the above line throws exception –

Original Exception:
java.lang.NullPointerException: Cannot invoke "org.hibernate.query.SelectionQuery.setMaxResults(int)" because the return value of "org.hibernate.query.SelectionQuery.setFirstResult(int)" is null

I debugged the code, and found that the following implementation of setFirstResult(int) in AbstractSelectionQuery is invoked –

public SelectionQuery<R> setFirstResult(int startPosition) {
  return null;}

I believe this is a bug, as all subclasses of AbstractSelectionQuery provides meaningful implementation of this method. Should this method be marked as abstract instead? If the setFirstResult() is not supported, maybe it’s better to throw an exception?