The word “Façade” means the front of the building in French. Similarly, the Facade design pattern is an interface between the client and the system. It hides the complexity of the system, isolates it from the client. It provides a higher level interface so that a client doesn’t have to deal with all the subsystems of the system individually. So that the client can use the system more easily. The Facade system is one of the structural design patterns.

Chord diagrams are eye catching, beautiful way to visualize inter-relationships between entities.

Each entity is represented by external nodes. Arcs show the relationship between nodes. The size of the arcs is determined by the strength of the relationship.

It is a structural design pattern and works as the electronic equivalent of its name. In this respect, it has a successful naming, and its purpose is understandable (it is also called wrapper). If you remember, structural design patterns were concerned with different classes working together. The adapter design pattern also ensures that incompatible interfaces are interoperable. It converts the interface of one class to the interface that the other class expects.