object SampleEnum extends Enumeration {
  val SAMPLE = SampleEnum("sample")
  val SAMPLE2 = SampleEnum(SAMPLE, "sample2")

  class SSampleEnum(val path: String) extends Val(nextId, path)
  class PSSampleEnum(parent: SSampleEnum, override val path: String) extends SSampleEnum(parent.path + "." + path)
  def apply(path: String): SSampleEnum = new SSampleEnum(path)
  def apple(parent: SSampleEnum, path: String): PSSampleEnum = new PSSampleEnum(parent, path)
}

scala> SampleEnum.SAMPLE
res0: Sample.SSampleEnum = sample

scala> SampleEnum.SAMPLE2
res1: Sample.PSSampleEnum = sample.sample2

scala> SampleEnum.SAMPLE.path
res2: String = sample

scala> SampleEnum.SAMPLE2.path
res3: String = sample2