Adapter Pattern vs Facade Pattern
- Facade defines a new interface, whereas Adapter uses an old interface. Remember that Adapter makes two existing interfaces work together as opposed to defining an entirely new one.
- Adapter and Facade are both wrappers, but they are different kinds of wrappers. The intent of Facade is to produce a simpler interface, and the intent of Adapter is to design an existing interface. While Facade routinely wraps multiple objects and Adapter wraps a single object; Facade could front-end a single complex object and Adapter could wrap several legacy objects
- Adapter and Facade both have a different interface than what they wrap. But the adapter derives from an existing interface, whereas the facade creates a new interface