Extension functions to work more comfortably with JSONObject. The idea is to capture nulls instead of Exception or bother with .has function

HowToUseIt.kt

// WARNING, this code doesn't work, is an example of usage

val json = JSONObject()

json.safeGetString("property")?.let { 
  // Do awesome things with property value
}

JSONObjectExtensionFunctions.kt

private fun JSONObject.safeGetJSONArray(element: String) : JSONArray? {
    return if (this.has(element))
        this.getJSONArray(element)
    else
        null
}
private fun JSONObject.safeGetJSONObject(element: String) : JSONObject? {
    return if (this.has(element))
        this.getJSONObject(element)
    else
        null
}
private fun JSONObject.safeGetString(element: String) : String? {
    return if (this.has(element))
        this.getString(element)
    else
        null
}

private fun JSONObject.safeGetInt(element: String) : Int? {
    return if (this.has(element))
        this.getInt(element)
    else
        null
}
private fun JSONObject.safeGetBoolean(element: String) : Boolean? {
    return if (this.has(element))
        this.getBoolean(element)
    else
        null
}
private fun JSONObject.safeGetDouble(element: String) : Double? {
    return if (this.has(element))
        this.getDouble(element)
    else
        null
}
private fun JSONObject.getJSONObjectFromJSONArrayIndex(element: String, index: Int) : JSONObject? {
    return try {
        JSONObject(this.getJSONArray(element)[index].toString())
    } catch (e:Exception) {
        null
    }
}