| Interface | Description |
|---|---|
| InvoiceFormatter |
This interface describes the tasks that an invoice
formatter needs to carry out.
|
| LineItem |
A line item in an invoice.
|
| Class | Description |
|---|---|
| Bundle |
A bundle of line items that is again a line item.
|
| DiscountedItem |
A decorator for an item that applies a discount.
|
| Invoice |
An invoice for a sale, consisting of line items.
|
| InvoiceTester |
A program that tests the invoice classes.
|
| Product |
A product with a price and description.
|
| SimpleFormatter |
A simple invoice formatter.
|