// 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);
}
// req: 16.1
public void cancelOrder(Order order) {
Assert.notNull(order);
Assert.isTrue(order.getId() != 0);
Assert.isTrue(
order.getConsumer().equals(consumerService.findByPrincipal()),
"Only the owner can cancel the order");
Assert.isTrue(order.getCancelMoment() == null, "order.cancel.error.isCancelled");
Clerk clerk;
clerk = clerkService.findByOrder(order);
Assert.isNull(clerk, "Can't remove a order when a clerk has assigned");
order.setCancelMoment(new Date());
this.save(order);
}