object Main extends App {
 
import scala.reflect._
 
case class Simple(one: String, two: Int)
 
class SimpleBuilder {
  var oneValue: Option[String] = None
  var twoValue: Option[Int] = None
 
  def one(value: String): SimpleBuilder = {
    oneValue = Some(value)
    this
  }
 
  def two(value: Int): SimpleBuilder = {
    twoValue = Some(value)
    this
  }
 
  def build(): Simple = {
    Simple(oneValue.getOrElse("DEFAULT"), twoValue.getOrElse(0))
  }
}
 
case class Complex(part: Double, place: String)
 
class ComplexBuilder {
  var partValue: Option[Double] = None
  var placeValue: Option[String] = None
 
  def part(value: Double): ComplexBuilder = {
    partValue = Some(value)
    this
  }
 
  def place(value: String): ComplexBuilder = {
    placeValue = Some(value)
    this
  }
 
  def build(): Complex = {
    Complex(partValue.getOrElse(0.0), placeValue.getOrElse("DEFAULT"))
  }
}
 
class BuilderFactory[T, B: ClassTag] {
  def create: B = classTag[B].runtimeClass.newInstance().asInstanceOf[B]
}
 
object FixtureBuilder {
  def builder[T, B](typ: T)(implicit ev: BuilderFactory[T, B]): B = ev.create
}
 
import FixtureBuilder._
implicit val simpleFactory = new BuilderFactory[Class[Simple], SimpleBuilder]
implicit val complexFactory = new BuilderFactory[Class[Complex], ComplexBuilder]
 
println(builder(classOf[Simple]).one("SOMETEXT").two(22).build())
println(builder(classOf[Complex]).part(3.14).place("London").build())
 
}

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