after init article

gistfile1.scala

trait AfterInit extends DelayedInit {
  def afterInit
  def afterInitLevel = 1
  private var initCount = 0
  private def getInitNumber(clazz: Class[_]):Int =
    if (clazz.getSuperclass == classOf[java.lang.Object]) 0 else getInitNumber(clazz.getSuperclass) + 1
  final def delayedInit(x: => Unit) {
    x
    initCount += 1
    if (getInitNumber(this.getClass) + afterInitLevel == initCount) afterInit
  }
}

abstract class A(id:String) extends AfterInit {
  def afterInit = println("Inited!")
}
class B extends A("BB") {
  println("B inited!")
}
new B // prints "B inited!", "Inited!"