Example of implementing a custom Jackson object mapper provider for Scala

CustomObjectMapperProvider.scala

import javax.ws.rs.ext.{ContextResolver, Provider}
import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.module.scala.DefaultScalaModule

@Provider
class CustomObjectMapperProvider extends ContextResolver[ObjectMapper] {
  def getContext(tpe: Class[_]): ObjectMapper = {
    if (tpe != classOf[ObjectMapper]) null
    else {
      val m = new ObjectMapper()
      m.registerModule(DefaultScalaModule)
      m
    }
  }
}