Blog Scala Scalactic http://blog.joecwu.com/2015/07/scava-scala-scalaz-validation-either-scalactic.html

blog-Scala-Scalactic.scala

case class HttpRequest(path:String, queryStrings:Map[String,List[String]]) {
  def getPath() : String Or String = if(path.length>0) Good(path) else Bad("path cannot be empty.")
  def getQueryStrings() : ((List[String], Int), String) Or Every[String] = {
    validateKeyword(queryString.get("keyword")) zip validateNumber(queryString.get("number")) zip validateGender(queryString.get("gender"))
  }
  def validateKeyword(value:Option[List[String]]) : List[String] Or One[String] = {
    if(value.isDefined && value.get.length>0) Good(value.get) else Bad(One("No keyword."))
  }
  def validateNumber(value:Option[List[String]]) : Int Or One[String] = {
    try{
      if(value.isDefined && value.get.length>0) Good(value.get.headOption.get.toInt) else Bad(One("No Number."))
    }catch{
      case ex:Exception => Bad(One("Wrong Number."))
    }
  }
  def validateGender(value:Option[List[String]]) : String Or Every[String] = {
    val gender = if(value.isDefined && value.get.length>0) Good(value.get.headOption.get) else Bad(One("No keyword."))
    gender.when(checkGenderValue)
  }
  def checkGenderValue(gender:String) : Validation[String] = {
    gender.toLowerCase match {
      case "male" | "female" => Pass
      case _ => Fail("Wrong gender.")
    }
  }
}

object TestApp {
  def run = {
    val dummyRequest = HttpRequest(
      "http://www.joecwu.com/user/search",
      Map(
        "keyword" -> List("joe")
        )
      )
    dummyRequest.getPath()
    // res: org.scalactic.Or[String,String] = Good(http://www.joecwu.com/user/search)
    dummyRequest.getPath().map(println)
    // http://www.joecwu.com/user/search
    dummyRequest.getQueryStrings()
    // res: org.scalactic.Or[((List[String], Int), String),org.scalactic.Every[String]] = Bad(Many(No Number., No keyword.))
  }
}