Phantom Types in Kotlin: Modelling a Pipeline. Request Inhertiance

Request.kt

/**
* This is our base request. 
* It contains the image taken by the camera
* The timestamp when it was taken (because it obviously matters)
* And some additional settings for the measure algorithm
*/
open class Request(
  val image: Image, 
  val timestamp: Timestamp, 
  val settings: MeasureSettings)

/**
* This is the special request necessary for detecting basic shapes 
* in an image. 
* 
* This also needs preparedImages, because the vision framework
* we are using cannot work with the Image type taken from the camera
* directly. 
*
* We also want to provide a scaled version of the prepared image
* To prevent every detector to scale the image down by itself (which can be expensive)
*/
class ShapeDetectionRequest(
  val preparedImage: Mat, 
  val preparedScaledImage: Mat,
  override val image: Image, 
  override val timestamp: Timestamp, 
  override val MeasureSettings): Request

/**
* This is the special request necessary for detecting basic features
* like arms, shoes, faces, etc in an imagge. 
*/
class FeatureDetectionRequest(
  val shapes: List<Shape>,
  val preparedImage: Mat, 
  val preparedScaledImage: Mat,  
  override val image: Image, 
  override val timestamp: Timestamp, 
  override val MeasureSettings): Request

/* AND SO ON AND ON AND ON */