Swift 10 组合模式 Composite Pattern

/*大宏药业有阿司匹林和扑热息痛生产部门。对於老板、他只需要指示生产药品就行。组合模式能各控件解耦、假如想增加抗组胺药生产部门、只需增加此部门即可。*/class MedicineProduct {func addOrder(p_obMedicOrder : MedicineProduct) { }func removeOrder(p_mOrderNum : Int) { }func getOrder(p_mOrderNum : Int) -> MedicineProduct {    return MedicineProduct()}func produceMedic() { }}class Aspirin : MedicineProduct {var p_stMedicBrand : String = ""init(p_stInputMedicBrand : String) {p_stMedicBrand = p_stInputMedicBrand}override func addOrder(p_obMedicOrder : MedicineProduct) {print("You have no authority to add order")}override func removeOrder(p_mOrderNum : Int) {print("You have no authority to remove order")}override func getOrder(p_mOrderNum : Int) -> MedicineProduct {print("You have no authority to get order")return MedicineProduct()}override func produceMedic() {print("Produce \(p_stMedicBrand) aspirin")}}class Pharmacology : MedicineProduct {var p_stMedicBrand : String = ""init(p_stInputMedicBrand : String) {p_stMedicBrand = p_stInputMedicBrand}override func addOrder(p_obMedicOrder : MedicineProduct) {print("You have no authority to add order")}override func removeOrder(p_mOrderNum : Int) {print("You have no authority to remove order")}override func getOrder(p_mOrderNum : Int) -> MedicineProduct {print("You have no authority to get order")return MedicineProduct()}override func produceMedic() {print("Produce \(p_stMedicBrand) Pharmacology")}}class MedicineOffice : MedicineProduct {var p_arrMedicProduct : [MedicineProduct] = []var p_stMedicOfficName : String = ""func setMedicOfficName(p_stInputMedicOfficName : String) {p_stMedicOfficName = p_stInputMedicOfficName}override func addOrder(p_obMedicOrder : MedicineProduct) {p_arrMedicProduct.append(p_obMedicOrder)}override func removeOrder(p_mOrderNum : Int) {p_arrMedicProduct.remove(at : p_mOrderNum)print("remove \(p_mOrderNum) order")}override func getOrder(p_mOrderNum : Int) -> MedicineProduct {return p_arrMedicProduct[p_mOrderNum]}override func produceMedic() {print("\(p_stMedicOfficName) produces Aspirin & Pharmacology")for p_obOrder in p_arrMedicProduct {p_obOrder.produceMedic()}}}let medicineOffice = MedicineOffice()medicineOffice.setMedicOfficName(p_stInputMedicOfficName : "Da Honge Medic Office")var Product1 = Aspirin(p_stInputMedicBrand : "ZhangXing")medicineOffice.addOrder(p_obMedicOrder : Product1)var Product2 = Pharmacology(p_stInputMedicBrand : "DaTong")medicineOffice.addOrder(p_obMedicOrder : Product2)medicineOffice.produceMedic()/*Da Honge Medic Office produces Aspirin & PharmacologyProduce ZhangXing aspirinProduce DaTong Pharmacology*/