// ref: 18.3
public void assignToClerkManual(Clerk clerk, Order order) {
Assert.notNull(clerk);
Assert.isTrue(clerk.getId() != 0);
Assert.notNull(order);
Assert.isTrue(order.getId() != 0);
Assert.isNull(order.getClerk());
order.setClerk(clerk);
this.save(order);
}
public Collection<Order> findAllByClerk() {
Collection<Order> result;
Clerk clerk;
clerk = clerkService.findByprincipal();
Assert.notNull(clerk);
result = orderRepository.findAllByClerkId(clerk.getId());
return result;
}