parse « convert « Java XML Q&A

1. XStream: Collapsing XML hierarchy as I parse    stackoverflow.com

I have an XML document (generated by Adobe XFA forms), that contains data like the following:

<Position>
   <PositionBorder>
       <Title/>
      ...

2. Converting org.w3c.dom.Document to org.apache.html.dom.HTMLDocumentImpl    stackoverflow.com

Is there anyway to convert an instance of org.w3c.dom.Document to org.apache.html.dom.HTMLDocumentImpl. I need to parse the images inside the Document and HTMLDocumentImpl has a method for extracting the images. I've tried several methods ...