how to create nodes from an external function

[wo...@gmx.net]

Hi everybody!

I tried to create nodes (element/text) from within an external function but
always get a XalanDOMException with code 9 (i.e. NOT_SUPPORTED_ERR). 

My approach was to get the context node's owner document and use it to
create new nodes. 

The code roughly looks like this:

MyFunction::execute(XPathExecutionContext&	executionContext,
			XalanNode*				context,
			const XObjectPtr		arg1,
			const XObjectPtr		arg2,
			const Locator*			locator) const
{
	typedef
XPathExecutionContext::BorrowReturnMutableNodeRefList	BorrowReturnMutableNodeRefList;
	
	XalanDocument* pDoc = context->getOwnerDocument();
	BorrowReturnMutableNodeRefList	theResult(executionContext);

	pParameterName =
reinterpret_cast<XalanNode*>(pDoc->createTextNode(XalanDOMString("my text node")));
	theResult->addNode(pParameterName);

	return executionContext.getXObjectFactory().createNodeSet(theResult);
}

I then had a look at the implementation of the XSLT document() function,
which simply uses the XPathExecutionContext's parseXML() method to read a new
document, so that is not an option here.

My next step was to use a dombuilder to create the nodes I wanted to create
and it actually works. The problem is, that I don't know how to keep track of
memory usage. If I delete the DOM builder right afterwards, the program
crashes (which seems quite logical to me ;-) but if I don't delete it, the memory
probably won't be freed.

Any help either on how to use a DOMBuilder correctly in this situation or
other suggestions on how to create nodes from within an external function are
greatly appreciated.

Cheers


Wolfgang

-- 
Wolfgang Schell
wolfgang.schell@gmx.net

GMX - Die Kommunikationsplattform im Internet.
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