AW: [Acdk-developer] Apache Xalan-C++ & Xerces-C++ in Artefaktur

[Roger R. K. <ko...@ar...>]

Hi,

>>
    I would like to ask why the XML in Artefaktur is not based on Apache
Xalan-C++ & Xerces-C++ ? These are most popular Java versions of XML
realizations and all Java programs which use XML very easy will be =
ported to
Artefaktur.
<<
ACDK includes two implementation for the org::xml:sax and org:w3c::dom
interfaces: expat with a lightweight non-validating parser
And libxml2 as validating parser including xpath support.

It is also possible to add more implementation for the org::xml:sax and
org:w3c::dom, like Xalan/Xerces.

There reason, why I preferred to use the Xerces/Xalan implementation:
- Code size and license will not allow to include the Xerces/Xalan
implementation in the acdk distribution.=20
  The current acdk_xml should compile on all platform without any need =
to
download/compile/link external libraries.
- Xerces/Xalan is rather heavy-weight. It provides own String and =
Container
solution and it would be necessary
  to copy these strings and container in memory from/to ACDK and
Xerces/Xalan String/Container versions.
- Xerces-C++ provides its own object C++ hierarchy. It is quite =
difficult to
wrap an existent object hierarchy
  with another. Casting from a base object to a derived object (like =
Node to
Element) will be a quite difficult
  thing. Wrapping an C++ object hierarchy on a (implicit) C hierarchy is =
in
the opposite quite easy.

I don't say it is impossible to use Xerces/Xalan as XML implementation =
and
wrap it with ACDK object model, but
it has several pitfalls.

Roger


-----Urspr=FCngliche Nachricht-----
Von: acd...@li...
[mailto:acd...@li...] Im Auftrag von =
Miroslav
Nachev
Gesendet: Mittwoch, 22. Juni 2005 11:23
An: acd...@li...
Betreff: [Acdk-developer] Apache Xalan-C++ & Xerces-C++ in Artefaktur

   Hi,


  =20

   Best Regards,
   Miroslav Nachev




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