I want to model a multi-dimensional hierarchy of s...

# getting-started

[nkiesel]

I want to model a multi-dimensional hierarchy of status codes: I have different operations like "generate data" or "upload file", and for each of them I have either "success" or "failure". All "failure" should carry a message, and groups like "generate" or "upload" also share some attributes. The existing code uses an enum for the different status codes and then a bunch of nullable properties for the different properties (nullable because they are sparsely filled/used). A better way seems to be a sealed class hierarchy. But modelling this straight forward would require multi-inheritance. Is there a good way to model this?

sealed interface Status
sealed class Failure(val message: String) : Status
sealed class Upload(val name: String) : Status
sealed class UploadFailure(message: String, name: String) : Failure(message), Upload(name)

[Chris Lee]

likely cleanest to pick one dimension for the classes, say “operation”, and have status as an attribute thereof.

[Sam]

Could you achieve what you want by replacing some of the sealed classes with sealed interfaces?

sealed interface Status
sealed interface Failure: Status {
    val message: String
}
sealed interface Upload {
    val name: String
}
data class UploadFailure(
    override val message: String,
    override val name: String
): Upload, Failure

[nkiesel]

Will try the suggestions and then revert back here with my choice

[nkiesel]

thanks for the suggestions