java design patterns - skin mode
Appearance Mode (Mode Facade): Exterior Facade provided as a set of a consistent interface subsystem interface, easy to use such that the set of subsystems (systems reduce the complexity of the original appearance by introducing a new role, while reducing and client classes subsystem Coupling)
scenes to be used
- Buyers: real estate agents, rental households
- Housing agency for the appearance of the Facade, know which subsystem is responsible for processing the request, the proxy client requests to appropriate subsystem objects.
- Rental households is a collection of subsystems: subsystem functions to achieve, the object handle assigned tasks Facade (Facade subsystems nobody any information)
- effect:
- You can prevent a common method call subsystem downcast.
- You can reduce the dependency between modules
