edu.pdx.cs410J.di.BookStore Maven / Gradle / Ivy
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package edu.pdx.cs410J.di;
import java.util.List;
/**
* A book store that depends on a {@link BookInventory} and a {@link CreditCardService}
*/
public class BookStore
{
private final BookInventory inventory;
private final CreditCardService cardService;
public BookStore( BookInventory inventory, CreditCardService cardService )
{
this.inventory = inventory;
this.cardService = cardService;
}
/**
* Purchases a number of books from this book store
*
* @return the total amount of the purchase
* @throws CreditCardTransactionException
* If a problem occurs while paying for the purchase
*/
public double purchase( List books, CreditCard card) {
double total = 0.0d;
for (Book book : books) {
inventory.remove(book);
total += book.getPrice();
}
CreditTransactionCode code = cardService.debit(card, total);
if (code == CreditTransactionCode.SUCCESS ) {
return total;
} else {
throw new CreditCardTransactionException(code);
}
}
}