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Refactoring 027 - Remove Getters
- The article discusses the importance of removing or replacing getters with behavior-rich methods in object-oriented programming.
- By removing getters, the code can address issues like anemic objects, excessive coupling, lost encapsulation, and violations of the Law of Demeter.
- Steps provided include identifying getters, moving behavior into objects, and creating intention-revealing methods.
- Sample code demonstrates the transformation from using getters to method-based behavior in an Invoice class.
- The refactoring aims to centralize logic within objects, hide implementation details, reduce coupling, and prevent violations of design principles.
- Removing getters helps objects behave more like real-world entities, strengthening the correspondence between code and reality.
- Limitations include challenges in dealing with frameworks expecting getters and difficulties in refactoring legacy codebases.
- The refactoring process involves finding, moving, and updating code to use new methods as behavior-rich alternatives to getters.
- It's an intermediate level refactoring that improves code quality and aligns better with object-oriented principles.
- Related refactorings include removing setters, extracting methods, and protecting public attributes.
- The article also suggests using the MAPPER principle and AI tools for effective refactoring.
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