This is yet another way of generating JSON from scala objects in a more type safe manner.

The JSON generation is driven by a configurable JsonBuilder that uses JsonFactory objects to convert objects to Json.

val json = new JsonBuilder().build (some_scala_object)

The JsonBuilder handles the conversion of primitives, String, and Collections.

For other custom classes, two JsonFactories are provided and may be enough in most circumstances to produce Json from Scala objects. The first one, uses reflection to generate a Json object property for each no-argument method that returns any value, excluding methods from the Object class (toString, hashCode, etc.).

import org.scala2json.JsonBuilder._

class Foo(val name:String, val size:Int, val bar:Bar)

class Bar(val id:String, val value:Boolean)

val json = new JsonBuilder().using(allFieldsOf[Foo]).using(allFieldsOf[Bar]).build(foosAndBars)

The second factory, allows the selection of specific fields or methods.

val json = new JsonBuilder() .using(selectedFieldsOf[Foo](f=>(f.name, f.bar))) .using(allFieldsOf[Bar]).build(foosAndBars)

The resulting json object can then be printed:

json.print(new StringWriter())