How to (de-)serialize an object with JAXB/SCALA when an @XmlJavaTypeAdapter is needed?

I need help using JAXB to (de-)serialize a Polygon of the JTS Library:

When implementing the

class PolygonAdapter extends XmlAdapter[String,Polygon] {...}

and annotating the polygon field like:

@XmlRootElement(name = "Room")
case class Room(@XmlAttrib开发者_运维百科ute name: String, description: String,
                @XmlJavaTypeAdapter(classOf[PolygonAdapter]) polygon: Polygon) {...}

I get the part classOf[PolygonAdapter]) marked reporting the following errors:

Multiple markers at this line
- type mismatch; found : java.lang.Class[room.PolygonAdapter](classOf[room.PolygonAdapter])     required: java.lang.Class[_ <: 
 javax.xml.bind.annotation.adapters.XmlAdapter]
- annotation argument needs to be a constant; found: classOf[PolygonAdapter]
- annotation argument needs to be a constant; found: classOf{<null>}[PolygonAdapter]{<null>}
- type mismatch; found : java.lang.Class[room.PolygonAdapter](classOf[room.PolygonAdapter])     required: java.lang.Class[_ <: 
 javax.xml.bind.annotation.adapters.XmlAdapter]
- annotation argument needs to be a constant; found: classOf{<null>}[PolygonAdapter]{<null>}

My Questions:

• How can I solve this problem?
• Is there a better way to (de-)serialize a complex object hierarchy in scala than using JAXB?

Thanks.

---

I am uncertain how to solve your first problem. Might be a problem with annotating a case class? Could try using a non-case class. But again very unsure about that. Might be related to this SO question?

scala: annotating accessor methods

However, have you looked at the Scala's built-in XML features?

http://www.ibm.com/developerworks/library/x-scalaxml/

http://www.scala-lang.org/node/131

http://www.codecommit.com/blog/scala/working-with-scalas-xml-support

edit: Could be worth to take a look at: http://scalaxb.org/ if you want to avoid using Scala's built in features...