Howto provide my own data structure as input to xalan?

[Yuraukar Nec <tu...@hotmail.com>]

I am trying to find a way to provide my own data structure as an input to 
Xalan C++, so I can use XSL to generate reports from my data. To achieve 
this, I am currently investigating the different options:

1. Wrap my data structure so it appears and behaves like a XalanNode that I 
can provide to Xalan
2. Wrap my data structure so it appears and behaves like a Xerces DOM node 
and use the existing wrapper to provide it to Xalan
3. any other idea?

For further clarification: assume I have a data structure like this:
class Order
{
   int nQuantity;
   string sProduct;
};
class Customer
{
   string sName;
   vector<Order> orders;
};
I would like to be able to feed an instance of Customer into Xalan an apply 
a stylesheet with templates such such as <xsl:for-each 
select="Customer/Orders[quantity>10]"> etc.
Does anyone have any experience with writing custom subclasses/wrappers for 
XalanNode, such as
class Order : public XalanNode
{
  //attributes as above

// overwrite/implement all those methods that descendants of XalanNode needs 
to define
}
Is XalanNode the correct place to start from or is there another, simpler 
entry point?
The reason to look for a wrapper is that the data structure may be fairly 
large, partly residing in a database, so I think its not an option to 
transform it into XML or some structure and then call Xalan.

I would appreciate any help here.

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