on deserialization Option[Long] is converted to Option[BigDecimal]

[stephanos]

When I deserialize an object that has a Option[Long] field (or [int]) the resulting object suddenly has a Option[BigDecimal] field - even when I specify the correct @OptionTypeHint!

Is this a bug or did I do something wrong?

Example:

import org.specs2.mutable.Specification
import reflect.BeanInfo
import sjson.json._
import annotation.target._

@BeanInfo
case class Person(name: String,
                  @(OptionTypeHint@field)(value = classOf[Long]) age: Option[Long]) {

    private def this() = this ("", None)
}

class Test extends Specification {

    "SJSON" should {

        "deserialize Option[Long] fields" >> {
            // initialize
            val age = Some(12L)
            val p = new Person("Daniel", age)

            // serialize and deserialize
            val json = Serializer.SJSON.out(p)
            val obj = Serializer.SJSON.in[Person](json).asInstanceOf[Person]

            // check result
            obj.age match {
                case b: Option[BigDecimal] => // THROWN
                    throw new RuntimeException("deserialization resulted in Option[BigDecimal]") 
                case l: Option[Long] => println("works")
            }
            obj.age must beEqualTo(age)
        }
    }
}

[debasishg]

With the latest 0.12 release, the following works ..

describe("Serialization of Long in a bean") {
it("should serialize") {
val m = Person("alexander", Some(27l))
serializer.inPerson should equal(m)
}
}

You don't need the cast as in your example and since a valid instance of Person is obtained, it's always a long that I get back. And in your example, the pattern match erases the type of Option[] - hence I think it's always the first one that matches. What do you get if you reverse case b: and case l: in position ?

Thanks.

[stephanos]

Well I couldn't come up with a better way to show this then pattern matching (reversing says "unreachable code").

In my real application I get an exception though, and my debugger shows my that it's really Option[BigDecimal] !
Here is a screenshot: http://imageshack.us/photo/my-images/199/capturehid.png/

Hm, what is the best way to check the runtime type? My skills are not that good yet.

PS: Using Scala 2.9.0 & sjson 0.12

[debasishg]

Let me send you another jar, which you can try and see if it solves your problem. Can u pls send me your email address where I can send it .. Thanks ..

[debasishg]

As confirmed in the mail, the new jar works. Fixed in the master. Will push 0.13 soon.