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Re: SAX2: Should SAXException extend IOException?

  • From: Ray Waldin <rwaldin@p...>
  • To: xml-dev@i...
  • Date: Thu, 23 Dec 1999 03:08:27 -0800

Re: SAX2: Should SAXException extend IOException?
from David's SAX2 Exceptions proposal:
> 5. Have all callbacks that formerly threw SAXException throw
>    IOException instead.  This should help to avoid a lot of exception
>    tunneling.

I don't see the point in a Handler throwing an IOException to a Parser in most
cases.  That is what this item implies, right?  What could a DocumentHandler
mean by throwing an IOException during a call to startElement?  The I/O has
already occurred before the handler gets involved.  The only times I can think
of where it *does* make sense is:

- EntityResolver.resolveEntity(), where the handler is taking part in IO
- ErrorHandler.*(), where a handler is passed an exception and may reflect it
back to the parser

-Ray

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