I am using kotlinx-serialization.

Let soppose I have this class

@Serializable
class Settings(
  val uiScale:Float=1f,
  val theme:String="dark",
)

I have serialized this class to a file which the result is

{
  "uiScale":1.0,
  "theme":"dark"
}

now some folk comes and change the json file content to this

{
  "uiScale":2.0, //from 1.0 to 2.0 (accpetable)
  "theme":1 //from "dark" to 1 (not acceptable and cause the whole serialization to fail because it must be string)
}

now when I try to deserialize my Settings class
it will throw an exception

Is there any way when a key can’t be deserialized use a default value and make the deserialization success ?
I need this result

{
  "uiScale":2.0,
  "theme":"dark" //because previous (1) is invalid for string type use default value that defined in data class
}

this is a sample example it could be very nested

Notes

• I know that it could be possible to write a custom serializer for my Settings but I want a global solution