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From "Carsten Ziegeler" <cziege...@sundn.de>
Subject AW: New Source Interface & Exception Handling Issues
Date Thu, 06 Sep 2001 15:35:16 GMT
> Vadim Gritsenko wrote:
> 
> Cocooners,
> 
> After migrating to new Source interface (extended from
> XMLizable), certain exception handling issues arised:
> 
>  o Source is unable to throw ProcessingException anymore
> (from toSAX method).
> 
> Result (in SitemapSource):
> 
>  o ProcessingException is wrapped into SAXException
> 
> But, getInputSource/getInputStream still can throw
> ProcesingException. Result:
> 
>  o ProcessingException is wrapped into SAXException, which is
> wrapped into ProcessingException (again)
> 
> As a result, Sitemap might get either SAXException[ProcessingException],
> or even ProcessingException[SAXException[ProcessingException]],
> which makes exception handling code ugly and unclear.
> 
> Same story applies to FileGenerator and may be to other
> components as well.
> 
> Proposed solution:
> 1. Preserve meaningful exceptions up to the exception
> handling point (sitemap)
+1

> 2. Add "throws ProcessingException" to toSAX method of
> XMLizable (to satisfy point 1)
+1, AFAIR the old stream() method did throw the ProcessingException.


Carsten

> 3. Think about how to handle exception before writing
> "throw new ...Exception("...", exception)"
> 
> I would love to hear suggestions from others on this topic.
> 
> Regards,
> Vadim
> 
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