Mixin.scala

object Mixin {
  def main(a: Array[String]) = {
    val gQuota = new GeneralQuota
    gQuota.printQuotaDetail

    val tQuota = new TatkalQuota
    tQuota.printQuotaDetail
    println("Is it Special train : "+tQuota.isSpecialTrain)    
    
    val lQuota = new LadiesQuota    
    lQuota.printQuotaDetail
    println("Is it Special train : "+lQuota.isSpecialTrain)
    lQuota.printTrainInfo

    val sQuota = new SeniorQuota
    sQuota.printTrainInfo
  }  

  // Abstract Class
  abstract class AbsInfo {    
    def isSpecialTrain: Boolean
  }  
  
  // Trait Object
  trait MyTrain {
    def printTrainInfo = {
      println("Train Number : 12675")
      println("Train Name : KOVAI EXPRESS")
    }
  }  

  // Normal Class
  class GeneralQuota {
    def printQuotaDetail = println("General Quota")
  }

  // Abstract class with interface method implementation 
  class TatkalQuota extends AbsInfo {
    def printQuotaDetail = println("Tatkal Quota")
    def isSpecialTrain:Boolean = false
  }  

  // Mixin Class composition
  class LadiesQuota extends AbsInfo with MyTrain {
    def printQuotaDetail = println("Ladies Quota")
    def isSpecialTrain:Boolean = false
  }

  class SeniorQuota extends GeneralQuota with MyTrain {

  }
}