![]() Lets understand this principle with code snippetīelow is PrintTasks interface which has method declarations which enables client classes to implement behaviors like printing, scanning, fax and photo copy. To overcome this problem, Robert C, Martin suggested solution as Interface Segregation principle. Due to this design, the staple job would know about all the method of the print job, even though there was no use for it to know. The problem with this approach is two-fold: the collection of methods defined in the interface increase as one adds more and more functionality of the object to the code (a violation of the Single Responsibility Principle), and implementations of the interface start to require exceptions to the rules of the interface. This resulted in a fat class with multiple methods, specific to variety of different clients. ![]() Whenever print job or stapling job need to be performed, the call was made to the big Job class. The design problem was that a single job class was used for almost all of the tasks. ![]() When software grew for Xerox, making modifications become more difficult and even a smaller change need hours. Software entities(Classes, modules, functions) should be open for. The software for this system was created from the ground up. Xerox had created a new printer system that could perform a various tasks like stapling and faxing along with the regular printing tasks. In this article, I’m going to try to explain SOLID Principles in the simplest way so that it. Lets understand with the problem statement at Xerox: This means the one fat interface need to be split into many smaller and relevant interfaces so that clients can chose the most relevant interfaces for them. In the below example, the Worker class implements the IWorker interface, and the SuperWorker class implements both IWorker and IEater interfaces. Here’s a simple example demonstrating the use of the Interface Segregation Principle in C. “A Client should not be forced to implement an interface that it doesn’t use.” If a class doesn’t use all methods of an interface, it might be a sign of ISP violation. The Interface Segregation Principle was first used and formulated by Robert C. What is Interface Segregation Principle(ISP)? This principle helps us to honor the Single Responsibility Principle. I think Protocol s from the typing module are very useful when building interfaces. Just like all other SOLID principles and design patterns ISP is not a silver bullet and it should be used when applicable. This principle relates to the problem of a fat interface which has too many attributes and behaviors. The Interface Segregation Principle is at it’s core a very simple principle, but it might take a while to get a full grasp on it. Today lets talk about " Interface Segregation Principle".
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