@Override
public void addRental(Rental rental) {
Lendable lendable = rental.getLendable();
Rental myRental = getMyRental(lendable);
if (myRental != null) myRental.renew();
else rentals.add(rental);
}
private Rental getMyRental(Lendable lendable) {
for (Rental aRental : rentals) if (aRental.getLendable().equals(lendable)) return aRental;
return null;
}
@Override
public boolean returnRental(Rental rental) {
return returnRentalForLendable(rental.getLendable());
}
@Override
public boolean removeRental(Rental rental) {
Rental myRental = getMyRental(rental.getLendable());
return myRental != null ? rentals.remove(myRental) : false;
}