com.neurosys.ecom.strategy.service

Class DefaultDiscountStrategy<P extends Product,U extends User>

java.lang.Object

com.neurosys.ecom.strategy.service.AbstractStrategy<P,U>

com.neurosys.ecom.strategy.service.AbstractChargeStrategy<P,U>

com.neurosys.ecom.strategy.service.DefaultDiscountStrategy<P,U>

Type Parameters:

P - as product

U - as user

All Implemented Interfaces:

ChargeStrategy<P,U>, CumulativeChargeStrategy<P,U>, Strategy

public class DefaultDiscountStrategy<P extends Product,U extends User>
extends AbstractChargeStrategy<P,U>

Calculate Any Discounts on Order; default impl there is no discount (all methods return null)
When discount is applied, then Amount.getDiscount() should be a positive value, and the same amount should be negative in Amount.getTotal() so that Amount.add(Amount) of discount value results in proper calculation. You are ADDING a DISCOUNT not DEDUCTING (Important to consider conventions)

Note: The fundamental difference between DefaultDiscountStrategy and PromotionStrategy is that this is applicable @ a product level only; while PromotionStrategy is applicable @ the cart level and also supports product level.

Author:

Arjun Dhar

Field Summary

Fields inherited from class com.neurosys.ecom.strategy.service.AbstractChargeStrategy

taxStrategy

Fields inherited from class com.neurosys.ecom.strategy.service.AbstractStrategy

productService, scanHierarchy

Constructor Summary

Constructors

Constructor and Description
DefaultDiscountStrategy()

Method Summary

Modifier and Type	Method and Description
<CONTEXT> Amount	calculate(P product, Number quantity, U user, String currency, List<PromotionForUser> promotions, CONTEXT context) Calculate raw amount for a product and any user making purchase

Methods inherited from class com.neurosys.ecom.strategy.service.AbstractChargeStrategy

applyTax, calculate, getTaxStrategy, getVersion, setTaxStrategy

Methods inherited from class com.neurosys.ecom.strategy.service.AbstractStrategy

getProductService, getRepresentativeProduct, isScanHierarchy, setProductService, setScanHierarchy

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DefaultDiscountStrategy

public DefaultDiscountStrategy()

Method Detail

calculate

public <CONTEXT> Amount calculate(P product,
                                  Number quantity,
                                  U user,
                                  String currency,
                                  List<PromotionForUser> promotions,
                                  CONTEXT context)

Description copied from interface: ChargeStrategy

Calculate raw amount for a product and any user making purchase

Parameters:

product - as P

quantity - as Number

user - as U @NUllable true

currency - as String @nullable true. A null implies default currency

Returns:

Amount @nullable true (implementation dependent)