autosystem

-oriented structure: Figure 1 Background 1: The company is a gold partner of Ford and Honda, and now requires the development of a self-driving system, as long as the system is installed on the car to achieve self-driving, the system can be used in Ford and Honda cars, as long as the two brands of cars use the system to achieve automatic driving. So someone made an analysis. Figure 1: We define an autosystem class, a fordcar class, And a hon

Honda vehicles, as long as the two brands of cars use the system to achieve autonomous driving. So someone made an analysis of one. For graph One analysis: We define a Autosystem class, a Fordcar class, and a Hondacar class. There are three methods in the Fordcar class and the Hondacar class: Run (Start car), Turn (Turn car), stop (stop car), of course, a car certainly more than these features, as long as you can explain the problem. The

) { This. Type =Cartype; } Public voidRuncar () {if( This. Type = =Cartype.fonda) {Hondcar. Run (); } Else if( This. Type = =Cartype.ford) {Fordcar. Run (); } } Public voidStopcar () {if( This. Type = =Cartype.fonda) {Hondcar. Stop (); } Else if( This. Type = =Cartype.ford) {Fordcar. Stop (); } } Public voidTurncar () {if( This. Type = =Cartype.fonda) {Hondcar. Turn (); }

and Class C are low-layer modules that are responsible for basic atomic operations, and if Class A is modified, it poses unnecessary risks to the program.The Autosystem class is directly dependent on the Hondacar and Fordcar two classes, resulting in a high coupling, autosystem classes want to manipulate Hondacar or fordcar must create the corresponding object directly. Modify: Modify Class A to dependent

dependent on abstraction. This is the most difficult to understand, usually in the framework of the project to use, for example, the business logic layer is a high-level module relative to the data layer, because the business logic layer needs to call the data layer to connect to the database, but to achieve scalable high-reuse, try not to let the business logic layer depends on the data layer, An interface can be abstracted from the data layer, allowing the business logic layer to rely on this

, it poses unnecessary risks to the program. The Autosystem class is directly dependent on the Hondacar and Fordcar two classes, resulting in a high coupling, autosystem classes want to manipulate Hondacar or fordcar must create the corresponding object directly. Modify: Modify Class A to dependent interface I, Class B and Class C each implement interface I, Class A through interface I indirectly with C

abstraction. This is the most difficult to understand, usually in the framework of the project to use, for example, the business logic layer is a high-level module relative to the data layer, because the business logic layer needs to call the data layer to connect to the database, but to achieve scalable high-reuse, try not to let the business logic layer depends on the data layer, An interface can be abstracted from the data layer, allowing the business logic layer to rely on this abstract int

logic; Class B and Class C are low-level modules responsible for basic atomic operations; if class A is modified, it brings unnecessary risks to the program. The AutoSystem class directly depends on the HondaCar and FordCar classes, which produces a high coupling. to control the HondaCar or FordCar class, you must directly create the corresponding object. Modify: Change Class A to dependent interface I. Class B and Class C implement interface I. Cla

is generally used when a project framework is built. For example, the business logic layer is a high-level module relative to the data layer, because the business logic layer needs to call the data layer to connect to the database, but to achieve high scalability and reuse, try not to make the business logic layer dependent on the data layer. You can abstract an interface at the data layer, make the business logic layer dependent on this abstract interface. Scenario: Class A (high-level module)

(); } } Public voidTurncar () {if(Type = =Cartype.honda) {Hondacar.turn (); } Else if(Type = =Cartype.ford) {Fordcar.turn (); } } }At present, is to meet the demand, but with the development of business is also developing, now if the development of partners, the need for other brands of cars to add automatic driving system, such as red Flag, Chery and other brands, then if the previous way, you need to modify the Autosyst