XInclude exceptions - how to mirror Xerces J functionality into Xerces C++? 2007-02-04 - By Simon Rowland
Michael Glavassevich wrote:
> Hi Simon,
>
> Simon Rowland <srowlandx11@(protected)> wrote on 02/03/2007 05:45:21 PM:
>
> The XInclude spec doesn't say but the various XML APIs (SAX, DOM, JAXP,
> StAX, etc...) do specify how errors are reported. Xerces-J's internal
> error reporting mechanism was designed so that it could support them. This
> includes reporting the error to a registered error handler and throwing an
> exception with location information (e.g. SAXParseException and
> XMLStreamException) up to the application if the error was fatal or if the
> error handler threw an exception. If you're planning to add XInclude
> support to Xerces-C++ as a new SAX/DOM parser feature [1] and/or as a new
> parameter [2] for DOM normalization [3] you should use the error reporting
> mechanisms which already exist for these APIs.
>
>
> [1] http://xerces.apache.org/xerces2-j/features.html#xinclude
> [2]
> http://xerces.apache.org/xerces2-j/javadocs/api/org/w3c/dom/DOMConfiguration
.html
> [3]
> http://xerces.apache.org/xerces2-j/javadocs/api/org/w3c/dom/Document.html
#normalizeDocument()
>
>
Thanks Michael, I really appreciate the reply. In the xerces c case, the
standard DOMParser to which I am adding xi as a feature can either
report errors through the clients errorHandler, which takes a
DOMException, or throw XMLException, which the client is expected to catch.
I'm currently favouring adding an XMLException, since extending
DOMException seems to go against its pretty tight spec:
http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-17189187
Several other modules inside the DOMParser e.g. platform utils etc
extend the XMLException too, so it seems inkeeping.
I've asked on c-dev too.
Thanks again for the help, Simon.
> Michael Glavassevich
> XML Parser Development
> IBM Toronto Lab
> E-mail: mrglavas@(protected)
> E-mail: mrglavas@(protected)
>
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