Reified generics kotlin.

gistfile1.txt

//me playing around for https://kotlinlang.slack.com/archives/C0922A726/p1494235351616257

fun main(args: Array<String>) {

    UnBundler.unbundlers.add(object: UnBundler(canHandle = Test::class) {
        override fun unbundle(b: Bundle): Any {
            println("it works!")
            return Test()
        }

    })

    TestTest()
}

inline fun <reified R: Bundler> Any.fromBundle(b: Bundle) : R {
    return UnBundler.unBundle<R>(b)
}

class TestTest {
    init {
        //val test: NotTest = fromBundle(object: Bundle{}) // throws
        val test: Test = fromBundle(object: Bundle{}) // works
    }
}


abstract class UnBundler(val canHandle: KClass<*>) {

    companion object {
        val unbundlers: MutableList<UnBundler> = arrayListOf()

        inline fun <reified R> unBundle(b: Bundle): R {
            val unbundler = unbundlers.find { it.canHandleClass(R::class) }

            if (unbundler == null)
                throw UnBundlerNotRegistered()

            return unbundler.unbundle(b) as R

        }
    }

    fun canHandleClass(kClass: KClass<*>): Boolean {
        return kClass == canHandle
    }

    abstract fun unbundle(b: Bundle): Any

}


interface Bundle
interface Bundler

class UnBundlerNotRegistered : Throwable() {

}

class Test: Bundler {

}

class NotTest: Bundler {

}