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package examples.shop.logic;
import java.util.List;
import examples.shop.impl.entity.LineItem;
/**
* The Cart interface.
*/
public interface Cart {
/**
* Adds an item to the shopping cart
*/
public void add(LineItem lineItem);
/**
* Changes the quantities of contents in the shopping cart
*/
public void modify(String productID, int quantity)
throws Exception;
/**
* Returns all the shopping cart line items
*
* @return A collection of Cart LineItems
*/
public List<LineItem> getAll();
/**
* Empties the shopping cart
*/
public void clear();
/**
* Get/set methods for the shopping cart owner's name
*/
public String getOwner();
public void setOwner(String owner);
/**
* Purchases this cart. The cart will create an order in the database.
*
* @return The Order confirmation number
*/
public String purchase();
/**
* Returns the subtotal price which has been previously set by
* setSubtotal().
*
* @return the subtotal of this cart items.
*/
public double getSubtotal();
/**
* Sets the subtotal price. Our external pricer bean is responsible for
* calculating the subtotal. It calculates it based upon customer discounts
* (and can be extended to include other rules as well).
*/
public void setSubtotal(double subTotal);
/**
* Returns the taxes for this Quote.
*/
public double getTaxes();
/**
* Sets the taxes for this Quote.
*/
public void setTaxes(double taxes);
/**
* Returns the total price. Total Price is computed from: 1) Subtotal price
* 2) Tax
*/
public double getTotalPrice();
}
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