Scala example source code file (bug3578.scala)

This example Scala source code file (bug3578.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

jarray, jarray, jbool, jdouble, jfield, jfield, jnothing, jobject, jobject, jvalue, jvalue, list, nil, string

The Scala bug3578.scala source code

object Test {
  sealed abstract class JValue {
    def ++(other: JValue) = {
      def append(value1: JValue, value2: JValue): JValue = (value1, value2) match {
	case (JNothing, x) => x
	case (x, JNothing) => x
	case (JObject(xs), x: JField) => JObject(xs ::: List(x))
	case (x: JField, JObject(xs)) => JObject(x :: xs)
	case (JArray(xs), JArray(ys)) => JArray(xs ::: ys)
	case (JArray(xs), v: JValue) => JArray(xs ::: List(v))
	case (v: JValue, JArray(xs)) => JArray(v :: xs)
	case (f1: JField, f2: JField) => JObject(f1 :: f2 :: Nil)
	case (JField(n, v1), v2: JValue) => JField(n, append(v1, v2))
	case (x, y) => JArray(x :: y :: Nil)
      }
      append(this, other)
    }
  }

  case object JNothing extends JValue
  case object JNull extends JValue
  case class JString(s: String) extends JValue
  case class JDouble(num: Double) extends JValue
  case class JInt(num: BigInt) extends JValue
  case class JBool(value: Boolean) extends JValue
  case class JField(name: String, value: JValue) extends JValue
  case class JObject(obj: List[JField]) extends JValue 
  case class JArray(arr: List[JValue]) extends JValue
}