Convert Object to Map of its fields

objectToMap.scala

val p = OkexParameters(Some(signed), apiKey, Some(symbol), None, None, None, None, Some(status), Some(currentPage), Some(pageLength))

import reflect.runtime.universe._
import reflect.runtime.currentMirror
val m = currentMirror.reflect(p)

m.symbol.typeSignature.members.toStream
  .collect{case s : TermSymbol if !s.isMethod => m.reflectField(s)}
  .filter(r => r.get != None) // filter out None
  .map(r => r.get match {
    case Some(v) => r.symbol.name.toString.trim -> v.toString
    case _ => r.symbol.name.toString.trim -> r.get.toString
  })
//      .map(r => s"${r._1}=${r._2}")
//      .mkString("&")
  .toMap

// Map(current_page -> 1, sign -> 4343GG2302394, symbol -> trx_eth, api_key -> aaaa, status -> unfilled, page_length -> 10)