NestedMutableMap.scala

  def getOrCreate[A](m: JMap[Any, Any], key: Any, create: A): A = {
    if (m.containsKey(key)) m.get(key).asInstanceOf[A]
    else {
      m.put(key, create)
      create
    }
  }

  def storeAtPath(m: JMap[Any, Any], path: Seq[String], values: Seq[Any]) {
    path.toList match {
      case key :: Nil => {
        // Insert the value
        m.put(key, values)
      }
      case key :: rest => {
        // Create another submap
        val subMap = getOrCreate(m, key, new JHashMap[Any, Any])
        storeAtPath(subMap, rest, values)
      }
    }
  }