Accord example showing stateful validators

Stateful.scala

package com.wix.accord.examples


class Stateful(allowedNames: Set[String]) {
  import com.wix.accord.dsl._
  import com.wix.accord._

  private implicit val classroomValidator = validator[Classroom] { c =>
    c.teacher.name is in(allowedNames)
    c.students.map(_.name).each is in(allowedNames)
  }

  def process(classroom: Classroom): Unit = {
    val result = validate(classroom)
    if (result.isFailure)
      throw new Exception("Uncool: " + result)
  }
}

object Stateful {

  def main(args: Array[String]): Unit = {
    val allowed = Set("moshe", "haim", "boris", "iris")
    val classroom = Classroom(
      grade = 10,
      teacher = Adult("iris", "abutbul", 27, "somewhere over the rainbow"),
      students = Set(
        Minor("moshe", "abutbul", 15, Set.empty),
        Minor("boris", "tchaikovsky", 15, Set.empty),
        Minor("drama", "queen", 15, Set.empty),
      )
    )

    val processor = new Stateful(allowed)
    processor.process(classroom)    // Fails on "drama"
  }
}