adapter

Adapter Pattern

The adapter pattern provides us with a way to create alternative interface representations of objects to be used in places where another, possibly incompatible interface is expected.

Structure

classDiagram

class Client
class Target {
    <<interface>>
    request();
}

class Adapter {
    request();
}

class Adaptee {
    specificRequest();
}

Target <-- Client : has-a
Target <|-- Adapter : implements
Adaptee <-- Adapter  : delegates-to

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Working example

As it looks like I'm not creative enough and the authors of Head-First Design Patterns, in this case, were not that creative as well, the working example is pretty simple: We have a Duck interface and a Turkey interface, and we adapted a Turkey object to behave like a Duck. Check out duck-adapter for implementation details.