Kotlinpoet How to add inner object class definition?

Question

I am trying to generate an object definition inside of a class. This is a distilled version:

class SomeClass {

   // need to figure out how to generate this
   companion object {

      // and this
      object Constants {
         val SOME_CONSTANT = "CONSTANT VALUE"
      }
   }
}

Answer 1

You can create the object with TypeSpec.objecBuilder and then nest it in a class with addType, for example:

val constants = TypeSpec.objectBuilder("Constants")
        .addProperty(PropertySpec.builder("SOME_CONSTANT", String::class)
                .mutable(false)
                .initializer("CONSTANT VALUE")
                .build())
        .build()

val someClass = TypeSpec.classBuilder("SomeClass")
        .addType(constants)
        .build()