Populate data classes with values from linkedhashmap - kotlin

Question

I have a linkedhashmap that has the following shape: <String, Subject>. The class Subject has the following fields:
class Subject {
var name: Boolean? = null
var lastname: Boolean? = null
var location: Boolean? = null
..
}
final_result =
"admin" -> Subject
"customer" -> Subject
etc.
I need to populate data classes that have the following format:
data class SubjectSummary(
val admin: SubjectData,
val customer: SubjectData
...
)
data class SubjectData(val details: DetailsData)
data class DetailsData(val name:String, val lastName:String ...)
Because I need to serialize the SubjectSummary class and get the following json format:
{
"admin": {
"details": {
"name": "",
"lastname": "",
...
}
}
"customer": {
"details": {
"name": "",
"lastname": "",
...
}
}
}
How do I assign the final_result map to match the SubjectSummary structure? I have done it with simple data classes, but when the fields within the data class are data classes, I'm not sure hot to populate it. Any guidance?
For simplicity I'm only showing a small example with a few fields.

Answer 1

If your goal with this transformation is just to be able to serialize with the given JSON format, then you don't need this SubjectSummary class. A Map<String, SubjectData> would be sufficient and probably more convenient to create when transforming from the initial map.
Also, it seems that DetailsData contains the same fields as Subject. If that's the case there is no need for an extra class either.
So in the end it seems you just need to create a Map<String, SubjectData where SubjectData could be defined as data class SubjectData(val details: Subject). You can transform your initial map pretty easily then:
val transformed = finalResult.mapValues { (_, subject) -> SubjectData(subject) }