adapter-pattern.md

Adapter Design Pattern

Adapter pattern allows incompatible classes to work together by converting the interface of one class into another expected by the clients.

Problem

Solution

Object Adapter

• Client Contains business logic of the program.

• Client Interface

Describes a protocol that other classes must follow to collaborate with the client code.

• Adaptee (Service)

The useful 3rd-party/legacy class. Client code cannot use this directly because of incompatible interface.

• Adapter
  • implements the client interface
  • wraps the service object

Class Adapter

• Adapter

Inherits behaviors from both the client and the service.

Caveats