pm.currentTransaction().begin();
for (int i = 0; i < NB_OBJ; i++) {
pm.makePersistent(new BasicA("testSimpleDelete_" + i, i));
}
pm.currentTransaction().commit();
pm.evictAll();
pm.currentTransaction().begin();
Query q = pm.newQuery(BasicA.class);
long l = q.deletePersistentAll();
pm.currentTransaction().commit();
pm.close();