The article discusses the process of refactoring code by extracting a common abstract class to better mimic real-world structures. It emphasizes identifying shared behaviors between classes, creating an abstract class to house these commonalities without implementations, and updating existing subclasses to inherit from this abstract class. The refactoring results in reduced code duplication, simplified maintenance, and improved functionality extension. Furthermore, it ensures adherence to best practices such as the Liskov Substitution Principle while enhancing the clarity of relationships between different objects in the hierarchy.
By introducing an abstract class, the code better reflects the real-world hierarchy, creating a clear relationship between the generic and specific types.
This refactoring is safe if you identify all common behaviors correctly and move one method at a time running the tests.
It reduces duplication, simplifies maintenance, and makes it easier to extend functionality by adding new concrete realizations.
Moving common logic to an abstract class allows for cleaner code, aligning with best practices such as Liskov Substitution.
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