law-of-demeter

It reduces coupling by enforcing strict rules about object interaction, ensuring methods do not depend on the internal structure of other objects to improve overall code maintainability.

To refactor long dot chains, you replace sequences like `user.getProfile().getAddress().getZipCode()` with a single direct method call such as `user.getZipCode()`, preventing methods from reaching through objects.

Tightly coupled code is hard to maintain because changes to an object's internal structure cascade through dependent methods, making the codebase fragile and difficult to modify without introducing regressions.

Applying the Law of Demeter simplifies testing by reducing dependencies on deep object structures, which makes it significantly easier to mock individual components and test them in isolation.

You should avoid reaching through objects whenever a method chains multiple getters, as this creates tight coupling to internal structures and directly violates the Law of Demeter's strict interaction rules.