Effective Interface with ISP

Keeping interfaces effective and focused

In this lesson, we’ll look at a principle that helps us write effective interfaces, known as ISP (Interface Segregation Principle). It advises us to keep our interfaces small and dedicated to achieving a single responsibility. By small interfaces, we mean having as few methods as possible on any single interface. These methods should all relate to some common theme. We can see that this principle is really just SRP in another form. We’re saying that an effective interface should describe a single responsibility. It should cover one abstraction, not several. The methods on the interface should strongly relate to each ...