I'm restoring complex data from json files and some of them requires call for specific types that does not have empty constructors, but constructors with default parameters.
There is a method for creation an empty object,
abstract class Restorer {
inline fun <reified T>load(ctx: T): T {
var that: T = reset(ctx)
// ...
}
inline fun <reified T>reset(ctx: T): T {
val primaryConstructorT = T::class.constructors.find {
it.parameters.isEmpty() || it.parameters.all { prm -> prm.isOptional }
}
return primaryConstructorT!!.call() // <--- here is a problem
}
}
So in some cases primaryConstructorT
is a reflection for constructor with optional params, but direct call for that produces an exception. Callable expects 2 arguments, but 0 were provided.
There is the case for creation simple data class
data class DataClass (val foo: List<String> = listOf(), val bar: List<Int> = listOf())
// ...
var context: DataClass? = null;
// ...
context = Restorer.load(context)
Is there any method to call it
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