How does Bridge pattern work?

The Bridge pattern lets you split the monolithic class into several class hierarchies . After this, you can change the classes in each hierarchy independently of the classes in the others. This approach simplifies code maintenance and minimizes the risk of breaking existing code.

Bridge is used when we need to decouple an abstraction from its implementation so that the two can vary independently . This type of design pattern comes under structural pattern as this pattern decouples implementation class and abstract class by providing a bridge structure between them.

Bridge is a structural design pattern that divides business logic or huge class into separate class hierarchies that can be developed independently . One of these hierarchies (often called the Abstraction) will get a reference to an object of the second hierarchy (Implementation).

Example. The Bridge pattern decouples an abstraction from its implementation, so that the two can vary independently. A household switch controlling lights, ceiling fans, etc. is an example of the Bridge. The purpose of the switch is to turn a device on or off.