Scala 2.10 reflection, how do I extract the field values from a case class, i.e. field list from case class

Question

How can I extract the field values from a case class in scala using the new reflection model in scala 2.10? For example, using the below doesn\'t pull out the field methods<

Answer 1

MethodSymbol has an isCaseAccessor method that allows you to do precisely this:

def getMethods[T: TypeTag] = typeOf[T].members.collect {
  case m: MethodSymbol if m.isCaseAccessor => m
}.toList

Now you can write the following:

scala> case class Person(name: String, age: Int)
defined class Person

scala> getMethods[Person]
res1: List[reflect.runtime.universe.MethodSymbol] = List(value age, value name)

And you get only the method symbols you want.

If you just want the actual field name (not the value prefix) and you want them in the same order then:

def getMethods[T: TypeTag]: List[String] =
  typeOf[T].members.sorted.collect {
    case m: MethodSymbol if m.isCaseAccessor => m.name.toString
  }