Re: Xalan NodeList to Xerces DOM NodeList

[David N Bertoni/CAM/Lotus]

You can't do this easily -- mostly because the Xerces DOM_* classes are not
polymorphic, but also because there's no publically exposed implementation
for a NodeList in Xerces.

You _can_ convert individual XalanNode* instances by asking the owning
document to map them:  However, this requires that you use Xalan's bride to
the Xerces DOM.  If you're using our default source tree implementation,
there's no way to do this.

Here's an example using our wrapper around Xerces:

   void
   foo(const XercesDocumentBridge*  doc)
   {
       XalanNodeList*      nl = doc->getChildNodes();
       const unsigned int  count = nl->getLength();

       for (unsigned int i = 0; i < count; ++i)
       {
           XalanNode* const  current = nl->item(i);

           DOM_Node          xercesNode(doc->mapNode(current));

           // Do something...
       }
   }

This also requires that you wrap the Xerces DOM document instance into a
Xalan instance:

   DOMParser                      parser;
   ...

   DOM_Document            xercesDocument = parser.getDocument();

   XercesDOMSupport     domSupport;
   XercesParserLiaison   parserLiaison(domSupport);

   XalanDocument* const       xalanDoc =
   parserLiaison.createDocument(xercesDocument);
   XercesDocumentBridge*   doc = parserLiaison.mapDocument(xalanDoc);

   foo(doc);

Dave



                                                                                       
   
                    "Yan Hailin"                                                       
   
                    <[EMAIL PROTECTED]        To:     <[EMAIL PROTECTED]>            
   
                    m.sg>                cc:     (bcc: David N Bertoni/CAM/Lotus)      
   
                                         Subject:     Xalan NodeList to Xerces DOM     
   
                    10/26/2001           NodeList                                      
   
                    03:55 AM                                                           
   
                    Please                                                             
   
                    respond to                                                         
   
                    xalan-dev                                                          
   
                                                                                       
   
                                                                                       
   



Hi,

I want to use Xalan and Xpath to get filtered xml elements, how can I
convert the Xalan NodeList to DOM NodeList?

Thanks.

regards,
Yan