Evolve json events using JSLT expressions

SchemaEvolve.scala

def evolve(event: ValidationResult[JsonNode]): EvolutionResult[JsonNode] = {
  val schemasReferenced: Seq[SchemaReferenced] = event.schemasReferenced
  val json = event.event
 
  val schemasToEvolve = schemasReferenced
    .filter { case SchemaReferenced(_, schemaRef) => hasEvolution(schemaRef) }
 
  val eventEvolved = schemasToEvolve
    .foldLeft(json) {
      case (jsonEvent: JsonNode, SchemaReferenced(location, schemaRef)) =>
        val evolutionExpr = buildEvolutionExpr(location, schemaRef)
        val expr: Expression = Parser.compileString(evolutionExpr)
        expr(jsonEvent)
    }
 
  EvolutionResult(
    event = json,
    evolved = eventEvolved,
    schemasReferenced = schemasReferenced,
    schemasEvolved = schemasToEvolve
  )