@Location annotation for typealias

[aviadmini]

I have a multiplatform project that makes use of common module in which my classes for API request/response are located. This is why I can't use @Location on the class itself (because common module can't have ktor jvm dependency)
I tried to create a typealias and apply @Location annotation to it but it gives compiler error because annotation doesn't target typealiases

I am not sure if this can be solved by just adding @Target(AnnotationTarget.TYPEALIAS) or needs some deeper integration but I'm sure this is a great feature to support

[spand]

As a workaround you can make your own LocationRouteService (that you instantiate from your own locations feature) that looks for a different annotation.

We have something like this where Path is our own location annotation:

class CustomLocationRouteService : LocationRouteService {
    inline fun <reified T : Annotation> KAnnotatedElement.annotation(): T? {
        return annotations.singleOrNull { it.annotationClass == T::class } as T?
    }

    override fun findRoute(klass: kotlin.reflect.KClass<*>): String? {
        return klass.annotation<Path>()?.path
    }
}

object CustomLocationsFeature : ApplicationFeature<Application, Locations, Locations> {
    override val key: AttributeKey<Locations> = Locations.key

    override fun install(pipeline: Application,
                         configure: io.ktor.locations.Locations.() -> Unit): Locations {
        return Locations(pipeline, CustomLocationRouteService()).apply(configure)
    }
}

[stale]

This issue has been automatically marked as stale because it has not had recent activity.

[oleg-larshin]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.