PriceListManager: holds the reference to PriceListManager

PricingSchemeNames: holds the key/Value pair for each allowed pricing scheme and its corresponding Calculator.

For example:

listPrice corresponds to the PriceListsListCalculator
bulkPrice corresponds to the PriceListsBulkCalculator
tieredPrice corresponds to the PriceListsTieredCalculator

getPricingScheme: returns the pricing scheme for the CommerceItem

priceItem: examines the allowed PricingSchemeNames HashMap. When a match is found, it will call the corresponding Calculator’s priceItem method. Otherwise, an exception is thrown to indicate that the pricing scheme is not found.

ItemListPriceCalculator: Calls the getPrice method from the PriceListManager to retrieve the list price of the CommerceItem. It then multiplies the price by the quantity returned by the getQuantity method of CommerceItem to get the total price. The ItemPriceInfo will contain one DetailedItemPriceInfo for each ShippingGroupCommerceItemRelationship in the CommerceItem. This is because of the Range property in both ShipItemRels and DetailedItemPriceInfos.

ItemBulkPriceCalculator: Calls the getPrice method from the PriceListManager to retrieve the complex price for the CommerceItem. It will check each price level of that complex price based on the quantity of the CommerceItem to decide the correct unit price for the item. The ItemPriceInfo will contain one DetailedItemPriceInfo for each ShippingGroupCommerceItemRelationship.

ItemTierPriceCalculator: Calls the getPrice method from the PriceListManager to retrieve the complex price for the CommerceItem. It will check each price level of that complex price to decide which unit price is used for each tier. The ItemPriceInfo will might several DetailedItemPriceInfos to reflect different unit prices for each tier.