Kotlin Object Notation

Lightweight kotlin MPP DSL for building JSON trees

Setup

Just drop the dependency in your commonMain sourceSet

kotlin {
  sourceSets {
    commonMain {
      dependencies {
        implementation("dev.petuska:kon:_")
      }
    }
  }
}

Usage

Build the object map via kobj builder function. Built object overrides Any::toString function to return proper json representation of the underlying structure. Currently, supported kotlin types for json output are the following:

• Map
• Array
• Collection
• KObject
• KArray
• Number
• Unsigned Number
• String
• Boolean
• null
• Pair
• Triple

val json: KON = kobj {
  "str" to "string"
  "number" to 420
  "boolean" to true
  "object" {
    "str" to "string"
    "number" to 1
    "pair" to (1 to null)
    "triple" to Triple(1, "2", 3)
    "boolean" to true
    "withArray" [1, "2"]
    "nested" {
      "stillGood" to true
      "nullable" to null
    }
  }
  "consistentObject" to {
    "nice?" to 69
  }
  "array"[
      1,
      "2",
      true,
      karr[1, "2", false],
      kobj {
        "inner" to true
      }
  ]
  "singleIntArray".to[1]
  "singleIntArray2" to karr[1]
}
json.toString() // Will return json string
json.toJS() // Only available on js target. Will return JS Json object
val jsonObject = json.toJsonObject() // Requires kon-serialization dependency. Will return kotlinx.serialization JsonObject.
jsonObject.toKObject() // Requires kon-serialization dependency. Will return KON KObject.

Modules

• kon - wrapper module bringing all the other modules as transitive dependencies
• kon-core - core implementation module
• kon-serialization - kotlinx-serialization interop module