How do I write custom setters for a class variable...

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[shirbal]

How do I write custom setters for a class variables where the class is data class ?

[Ruckus]

shirbal: That's not what data classes are for. Data classes are simple containers for encapsulating data, not functionality.

[shirbal]

it is probably worth mentioning that I am just checking the language abilities, not really want to do it.
Want to make sure that a developer will not be able to do it.
I am working on pushing the language to our stack and pointing some stuff, thanks

[Ruckus]

I don't believe there is a way to declare custom getters or setters for properties defined in the primary constructor.

[shirbal]

there are some hacks which you can do, for example make it private and define a public wrapper on top of it, similar to C# convention with properties

[Ruckus]

You could, but then the generated functions would use the private property, and you may not represent the returns in the wrapped custom getters, which could be a serious issue depending on what you're doing.

[lovis]

@Ruckus

Data classes are simple containers for encapsulating data, not functionality

i would not go so far and say “no functionality” there is a reason why you can add functions to data classes…
using the data keyword is not an excuse to write an anemic model.

[lovis]

however, i argee that they probably shouldn’t have custom getters/setters though, since that breaks POLA

[Ruckus]

I guess minimal functionality might have been better, but I actually go with no functionality for data classes. It makes it clearer to me when using a data class what I can and cannot expect from it, but that is obviously a personal preference.