I haven't looked into the delegate/criteria stuff but my lazy-man's way of
doing this is:
| List<Customer> customers = entityManager.createQuery("select c from
Customer as c "+
| " where c.customerId >= :minCustomerId"+
| " and c.customerId <= :maxCustomerId")
| .setParameter("minCustomerId",
selectedCustomer==null?Long.MIN_VALUE:selectedCustomer.customerId)
| .setParameter("maxCustomerId",
selectedCustomer==null?Long.MAX_VALUE:selectedCustomer.customerId)
| .getResultList();
|
Cheers,
Damian.
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