@Konverter.Source

The annotation @Konverter.Source is only being processed in abstract functions in interfaces annotated with @Konverter.

It can be used to pass additional fields to the mapping functions.

@Konverter
interface PersonMapper {
    fun toDTO(@Konverter.Source partialPerson: PartialPerson, age: Int): PersonDto
}

class PartialPerson(val name: String)
class PersonDto(val name: String, age: Int)

This will generate

object PersonMapperImpl : PersonMapper {
  override fun toDTO(partialPerson: PartialPerson, age: Int): PersonDto = PersonDto(
    name = partialPerson.name,
    age = age
  )
}

Additional parameters passed to the mapping function take precedence over fields in the @Konverter.Source annotated parameter.