Java DSL cannot create ContentTypeResolver

[jypma]

The docs say _Implement this interface to provide a custom mapping _, but implementing just akka.http.javadsl.server.directives.ContentTypeResolver makes the target class not be a scala ContentTypeResolver, causing JavaMapping to error out with

Illegal custom subclass of akka.http.scaladsl.server.directives.ContentTypeResolver. Please use only the provided factories in akka.http.javadsl.model.Http

I think the simplest solution may be to have a factory around a lambda, rather than an interface, i.e.

def create(java.util.function.Function[String,ContentType]): ContentTypeResolver

[ktoso]

Good catch, and the proposed solution is good as well. Should be ContentTypeResolver.create(....)