获取Scala案例类的类型标签的Java类

Question

Using the type safe configuration and configs ( "com.github.kxbmap" %% "configs" % "0.4.4", ) library

def loadConfiguration[T <: Product: TypeTag]: T = {
    import configs.syntax._
    val conf = ConfigFactory.load
    conf.get[MyCaseClass]

should load the config, but fails as T is not a class . How can I actually transform T to fit for configs as a java class?

Answer 1

I'd suggest simply replacing TypeTag with ClassTag since you aren't using the TypeTag . And if you were, you could combine them: T <: Product : TypeTag : ClassTag] or use this solution: https://stackoverflow.com/a/18730004/9204

From the question I assumed "configs" could work given a Java Class object (or a ClassTag wrapping one). But after checking the documentation I see that it doesn't, so the above isn't relevant.

Instead you should use

def loadConfiguration[T : Configs]: T = ...