The Adapter pattern, one of the classic Gang of Four structural design patterns, adapts an existing interface (the "adaptee") to a different interface expected by a client, without modifying either the client or the adaptee. It has two classical forms — an object-based version built on composition, where the adapter holds an instance of the adaptee and implements a target interface, and a class-based version built on inheritance, where the adapter is itself a subclass of the adaptee. This belongs to the domain of object-oriented software design, specifically structural design patterns and the broader principles of interface abstraction and decoupling.
The Adapter pattern, one of the classic Gang of Four structural design patterns, adapts an existing interface (the "adaptee") to a different interface expected by a client, without modifying either t…