The Single Responsibility Principle (SRP) is a fundamental concept in software design that promotes creating focused, cohesive classes. Imagine a Swiss Army knife – while versatile, each tool is designed for a specific purpose. Similarly, SRP advocates for classes that have a single, well-defined responsibility.
Consider a class called `CustomerManager` that handles customer-related operations. If this class is responsible for managing customer data, generating reports, and sending emails, it violates SRP. Instead, we should separate these responsibilities into distinct classes: `CustomerRepository` for data management, `ReportGenerator` for creating reports, and `EmailSender` for handling email communication.
By adhering to SRP, we achieve better modularity and reusability. Each class becomes more focused, easier to understand, and less prone to errors. Changes to one responsibility don’t impact others, reducing the risk of unintended consequences. Additionally, classes with single responsibilities are more reusable across different parts of the system.
Applying SRP leads to a more maintainable and flexible codebase. It promotes the creation of small, self-contained classes that are easier to test, modify, and extend. When designing classes, always ask yourself: “What is the single responsibility of this class?” If you find multiple responsibilities, it’s time to refactor and split the class into smaller, more focused components.
Author: John Rowan
I am a Senior Android Engineer and I love everything to do with computers. My specialty is Android programming but I actually love to code in any language specifically learning new things.Share this:
