Convert Xalan Document to Xerces

[pr...@wipro.com]

Hi Everybody,

Basically want to add new node to existing Xalan Document.


XalanDocument theDocument is created as shown below ,

XalanSourceTreeInit             theSourceTreeInit;
XalanSourceTreeDOMSupport  theDOMSupport;
XalanSourceTreeParserLiaison theLiaison(theDOMSupport);
XalanDocument* theDocument;
theDOMSupport->setParserLiaison(theLiaison);
....
theDocument = theLiaison->parseXMLStream(inStream);

The "Domdoc" seems to return null always. please do help me how to
proceed on this ?

XercesDOMSupport     domSupport;
XercesParserLiaison   parserLiaison(domSupport);
const DOMDocument*   Domdoc =
parserLiaison.mapToXercesDocument(theDocument);
if ( Domdoc == NULL ) {
    cerr << "Domdoc  is NULL"  << endl;
}

Since I have already coded eveything in Xalan I cannot switch over to
Xerces. Any kind of hint will be of great help to me.

Thanks
Praveen





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Re: Convert Xalan Document to Xerces

[da...@us.ibm.com]

> XercesDOMSupport     domSupport;
> XercesParserLiaison   parserLiaison(domSupport);
> const DOMDocument*   Domdoc = 
parserLiaison.mapToXercesDocument(theDocument);
> if ( Domdoc == NULL ) {
>     cerr << "Domdoc  is NULL"  << endl;
> }

It looks like you've create a XercesParserLiaison instance in order to 
recover the underlying Xerces DOMDocument from an instance you've created 
with XalanSourceTreeParserLiaison.  Since there is no underlying 
DOMDocument, it's not surprising it returns a null pointer.

If you really want to work the Xerces-C DOM, then use a 
XercesParserLiaison instance instead of a XalanSourceTreeParserLiaison. 
However, you should be aware that performance will suffer.  If you intend 
to modify the DOMDocument and use it again with Xalan-C, you must start 
with a Xerces DOMDocument and use the XercesParserLiaison to wrap it for 
use with Xalan-C.  There is some information regarding this in the 
documentation, and you can search the mail archive for more information.

Dave

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