Scala JSON Pretty Formatter

JSONPrettyFormat.scala

import scala.util.parsing.json._                                                               
                                                                
val prettyFormatter: JSONFormat.ValueFormatter = {                                             
  def create(level: Int): JSONFormat.ValueFormatter = (x: Any) => {                            
    x match {                                                                                  
      case s: String => "\"" + JSONFormat.quoteString(s) + "\""                                
      case jo: JSONObject =>                                                                   
        "{\n" +                                                                                
        "\t" * (level + 1) +                                                                   
        jo.obj.map({                                                                           
          case (k, v) => JSONFormat.defaultFormatter(k.toString) + ": " + create(level + 1)(v) 
        }).mkString(",\n" +                                                                    
        "\t" * (level + 1)) +                                                                  
        "\n" +                                                                                 
        "\t" * level +                                                                         
        "}"                                                                                    
      case ja: JSONArray => ja.toString(create(level))                                         
      case other => other.toString                                                             
    }                                                                                          
  }                                                                                            
  create(0)                                                                                    
}