Façade
The façade pattern is a special case of the adapter pattern that provides a simplified interface over a collection of classes. I mentioned such a scenario in the Adapter section but only within the context of a single class, SimpleShip. This same idea can be expanded to provide an abstraction around a group of classes or an entire subsystem.
The following is the class diagram of the façade pattern:
Implementation
If we take the same SimpleShip class as before and expand it to an entire fleet, we have a great example of the use to create a façade. If it was difficult to sail a single ship, it would be far more difficult to command an entire ...
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