In my opinion, by using a getter you can only break "Interface Segregation" if you break the "Liskov Substitution"
About LAW OF DEMETER:
the correct thing is that the customer makes the payment, and keep it for him, after all, it is not the wallet that pays, but the customer.
Code: Custumer.deduct (orderAmount)
You said right at the beginning of the article.
"Now, I want to point out that there is no meaningful functional difference between that class, a public class with a public class member, and the following class, a public class with a private member that is exposed by getters and setters."
But I say:
Imagine that you use this code in 10 locations
car1.engine = new HemiEngine();
Now you need to enter a validation when changing the engine of the car. you will have to change the code in several places because you broke Demeter's law.
About changing engine properties
Single Responsibility: Ideally a class would encapsulate a property change, without getters there is no way to use a logic injected into the constructor
Integrity, with getters you can return a copy of the values of your engine.
Both of these reasons force you not to create public fields.
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About SOLID:
In my opinion, by using a getter you can only break "Interface Segregation" if you break the "Liskov Substitution"
About LAW OF DEMETER:
the correct thing is that the customer makes the payment, and keep it for him, after all, it is not the wallet that pays, but the customer.
Code:
Custumer.deduct (orderAmount)You said right at the beginning of the article.
"Now, I want to point out that there is no meaningful functional difference between that class, a public class with a public class member, and the following class, a public class with a private member that is exposed by getters and setters."
But I say:
Imagine that you use this code in 10 locations
car1.engine = new HemiEngine();Now you need to enter a validation when changing the engine of the car. you will have to change the code in several places because you broke Demeter's law.
About changing engine properties