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Convert Scala XML to Java DOM

/ Published in: Scala
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  1. object XmlHelpers {
  2.     val docBuilder =
  3.         javax.xml.parsers.DocumentBuilderFactory.newInstance().newDocumentBuilder()
  4. }
  5.  
  6. class NodeExtras(n: Node) {
  7.     def toJdkNode(doc: org.w3c.dom.Document): org.w3c.dom.Node =
  8.         n match {
  9.             case Elem(prefix, label, attributes, scope, children @ _*) =>
  10.                 // XXX: ns
  11.                 val r = doc.createElement(label)
  12.                 for (a <- attributes) {
  13.                     r.setAttribute(a.key, a.value.text)
  14.                 }
  15.                 for (c <- children) {
  16.                     r.appendChild(c.toJdkNode(doc))
  17.                 }
  18.                 r
  19.             case Text(text) => doc.createTextNode(text)
  20.             case Comment(comment) => doc.createComment(comment)
  21.             // not sure
  22.             case a: Atom[_] => doc.createTextNode(a.data.toString)
  23.             // XXX: other types
  24.             //case x => throw new Exception(x.getClass.getName)
  25.         }
  26. }
  27.  
  28. class ElemExtras(e: Elem) extends NodeExtras(e) {
  29.     override def toJdkNode(doc: org.w3c.dom.Document) =
  30.         super.toJdkNode(doc).asInstanceOf[org.w3c.dom.Element]
  31.  
  32.     def toJdkDoc = {
  33.         val doc = XmlHelpers.docBuilder.newDocument()
  34.         doc.appendChild(toJdkNode(doc))
  35.         doc
  36.     }
  37. }
  38.  
  39. implicit def nodeExtras(n: Node) = new NodeExtras(n)
  40. implicit def elemExtras(e: Elem) = new ElemExtras(e)

URL: https://gist.github.com/167566

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