Mao to Json

maptojson.scala

// TODO: See if this is any good and worth refactoring. From some internal Scala code written by someone at Azavea.
package object json {
  def quote(s:String) = if(s == null) "\"\"" else "\"" + (s.replace("\\", "\\\\").replace("\"", "\\\"")) + "\""
  def quote(a:Any):String = if(a == null) "\"\"" else quote(a.toString)

  def arrayToJson(left:String, as:Array[String], right:String) = if (as.length > 0) {
    val n = as.foldLeft(0)(_ + _.length + 1) + left.length + right.length
    val b = new StringBuilder(n)
    b.append(left)
    b.append(as(0))
    var i = 1
    while (i < as.length) {
      b.append(",")
      b.append(as(i))
      i += 1
    }
    b.append(right)
    b.toString
  } else {
    left + right
  }

  def mapToJson(m:scala.collection.Map[String, Any]) = {
    val as = m.toArray.map { case (k, v) => quote(k) + ":" + v.toString }
    arrayToJson("{", as, "}")
  }

  // This is *horrible*................ ARG
  def mapToJsonQuoted(m:scala.collection.Map[String, Any]) = {
    val as = m.toArray.map { case (k, v) => quote(k) + ":" + quote(v.toString) }
    arrayToJson("{", as, "}")
  }
}