Snippet for recursive XML in scala

import scala.xml.pull._
import scala.xml.UnprefixedAttribute
import scala.collection.mutable.ListBuffer
import scala.collection.mutable.Stack
import scala.io.Source

class Joint(name:String) {
  val joints = ListBuffer[Joint]()
  def addJoint(joint:Joint) {
    joints += joint
  }
  override def toString:String = {
    "joint_" + name + ": " + joints.mkString("[", ",", "]")
  }
}

val source = Source.fromString("""<model>
    <joint name="pelvis">
            <joint name="lleg">
                    <joint name="lfoot"/>
            </joint>
            <joint name="rleg">
                    <joint name="rfoot"/>
            </joint>
    </joint>
</model>""")

var result: Joint = null

val xer = new XMLEventReader(source)
val ancestors = new Stack[Joint]()

while (xer.hasNext) {
  xer.next match {
    case EvElemStart(_, "joint", UnprefixedAttribute(_, name, _), _) =>
      val joint = new Joint(name.toString)
      if (ancestors.nonEmpty)
        ancestors.top.addJoint(joint)
      ancestors.push(joint)
    case EvElemEnd(_, "joint") =>
      result = ancestors.pop
    case _ =>
  }
}

println(result)