Facade Class
- Bean usually composed of multiple classes
- One class nominated as facade class
- Clients use only facade class methods
Facade Pattern
Context
- A subsystem consists of multiple classes, making it complicated
for clients to use
- Implementor may want to change subsystem classes
- Want to give a coherent entry point
Solution
- Define a facade class that exposes all capabilities of the
subsystem as methods
- The facade methods delegate requests to the subsystem
classes
- The subsystem classes do not know about the facade class
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