How to implement interface Serializable in scala?

Question

I have scala class like:

@Entity("users")
class User(@Required val cid: String, val isAdmin: Boolean = false, @Required val dateJoined: Date = new Date() ) {
  @Id var id: ObjectId = _



    @Reference
  val foos = new ArrayList[Foo]

    }

If it was a Java class I would simply put implements java.io.Serializable but this does not work in scala. Also is foos as declared above is private or public?

Answer 1

How do I use a @serializable scala object?

foos is public unless marked otherwise

Answer 2

scala 2.9.x also have an interface named Serializable, you may extends or mixin this. before 2.9.x the @serializable is the only choice.