Extension Point: Validate Shopping Cart at Checkout

Basics

Parameter	Value
Extension Point Key	VALIDATE_SHOPPING_CART_AT_CHECKOUT
Extension Point Name	Validate Shopping Cart at Checkout
Extension Interface	ShoppingCartValidator
Supports Multiple Extensions?	Yes
Selector Type	Store
Available Since	1.0.0

Use Cases

Extensions implementing this Extension Point can enforce business rules that prevent shopping carts from being purchased.

Methods

validate

The validate method is invoked during checkout. In Cortex, this happens when the cart order resource is read (with a GET operation), when the purchase form resource is read (with a GET operation), and when the purchase form is submitted (with a POST operation).

For the GET operations, if one or more extensions returns StructuredErrorMessage objects, then the action link is omitted, and the error message details are returned in the "messages" section of the response so that the shopper can understand why the cart can’t be purchased.

For the POST operation, if one or more extensions returns StructuredErrorMessage objects, then a 400 BAD REQUEST response is returned, and the error message details are returned in the response body so that the shopper can understand why the cart can’t be purchased.

note

The Validate Product Sku at Checkout and Validate Shopping Cart at Checkout Extension Points are invoked at the same time as this Extension Point.

Extension Sample

@Extension
@XPFAssignment(extensionPoint = XPFExtensionPointEnum.VALIDATE_SHOPPING_CART_AT_CHECKOUT, priority = 100)
public class BlockingShoppingCartValidator extends XPFExtensionPointImpl implements ShoppingCartValidator {
    @Override
    public Collection<XPFStructuredErrorMessage> validate(final XPFShoppingCartValidationContext xpfShoppingCartValidationContext) {
        List<XPFStructuredErrorMessage> results = new ArrayList<>();
        results.add(new XPFStructuredErrorMessage("block.shopping.cart", "Always block shopping cart from being created or purchased.", Collections.emptyMap()));
        return results;
    }
}