Catalog (Student Root 5.1.0-SNAPSHOT API)

All Known Implementing Classes:

CatalogImpl
```
public interface Catalog
```
The catalog maintains a view of the inventory known to our application.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`int`	`addToCart(int id, String validEmail)`	Adds the selected product to the users' shopping cart and returns the count of items.
`List<Product>`	`getProducts(int offset, int limit)`	Returns a list of products in the catalog chunked into page sizes.

- Method Detail
  - getProducts
```
List<Product> getProducts(int offset,
                          int limit)
```
    Returns a list of products in the catalog chunked into page sizes.
    
    Parameters:
    
    offset -
    
    limit -
    
    Returns:
    
    list of products matching the paging criteria
  - addToCart
```
int addToCart(int id,
              String validEmail)
```
    Adds the selected product to the users' shopping cart and returns the count of items.
    
    Parameters:
    
    id -
    
    validEmail -
    
    Returns:
    
    number of items in cart