JSONObject remove empty value pairs

Question

Here is my Json File:

{  
   \"models\":{},
   \"path\":[  
      {  
         \"path\":\"/web-profiles\",
         \"operations\":[  
            {  
               


        

Answer 1

In Scala with org.json library, can be easily converted to Java (although a bit more verbose). Recursively removes nulls and empty objects/arrays:

import org.json.{ JSONArray, JSONObject }

object JsonCleaner {

  def clean(json: JSONObject): Boolean = {
    val i = json.keys()
    while (i.hasNext) clean(i, json.get(i.next()))
    json.length == 0
  }

  def clean(json: JSONArray): Boolean = {
    val i = json.iterator()
    while (i.hasNext) clean(i, i.next())
    json.length == 0
  }

  private def clean(i: java.util.Iterator[_], v: Any) {
    v match {
      case o: JSONObject =>
        if (clean(o)) i.remove()
      case a: JSONArray =>
        if (clean(a)) i.remove()
      case JSONObject.NULL | "" =>
        i.remove()
      case _ =>
    }
  }

}