gistfile1.scala

object ChiShapeGenerator extends ChiShapeGenerator {
  trait JavaConvertible[From, To] { def asJava(obj: From): To }
  object JavaConvertible {
    def apply[A, B](obj: A) = implicitly[JavaConvertible[A, B]].asJava(obj)

    implicit object HoleParamsJC extends JavaConvertible[HoleParams, HP] {
      def asJava(obj: HoleParams) = new HP(obj.holeEdgeLengthThreshold)
    }

    implicit object SmoothHoleParamsJC
      extends JavaConvertible[SmoothHoleParams, SHP] {
      def asJava(obj: SmoothHoleParams) = new SHP(
        JavaConvertible(obj.nonSmoothParams),
        obj.holeLineStiffness, obj.holeLineElasticity
      )
    }

    implicit object ClusteringParamsJC
      extends JavaConvertible[ClusteringParams, CP] {
      def asJava(obj: ClusteringParams) = new CP(obj.clusterNodesDistance)
    }
  }
}

gistfile2.txt

ChiShapeGenerator.scala:16: could not find implicit value for parameter e: ChiShapeGenerator.JavaConvertible[A,B]
[error]     def apply[A, B](obj: A) = implicitly[JavaConvertible[A, B]].asJava(obj)

trait JavaConvertible[From,To] { def asJava(a:From): To }
object JavaConvertible {
// convenience function
def apply[A,B] = implicitly[JavaConvertible[A,B]]
implicit object HoleParamsJC extends JavaConvertible[HoleParams, <Return type?>] {
def asJava(a:From) = a.holeEdgeLengthThreshold
}
}

// How you'd use it
def fooA,B(implicit jc:JavaConvertible[A,B]):B = jc.asJava(someItem)