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- From: Miles Sabin <msabin@cromwellmedia.co.uk>
- To: Elliotte Rusty Harold <elharo@metalab.unc.edu>, xml-dev@xml.org
- Date: Thu, 9 Mar 2000 15:59:17 -0000
Elliotte Rusty Harold wrote,
> What I suspect it should do is:
>
> public void parse (String systemId)
> throws SAXException, IOException
> {
> parse(new InputSource(systemId));
> }
>
> No similar constraint is given in the Java docs for
> XMLFilterImpl, which does not implement XMLReader, so maybe
> there's a reason for these two to behave differently. But it
> seems suspicious to me. Since XMLFilterImpl implements
> XMLFilter which extends XMLReader, I'd expect the constraints
> to inherit through.
No doubt about it: you're right, it's a bug and your solution
is the right one.
The XMLReader interface made a behavioural contract, and all
it's implementers, XMLFilterImpl included must honour it, on
pain of violating the Liskov Substitution Princlple (qv).
Cheers,
Miles
--
Miles Sabin Cromwell Media
Internet Systems Architect 5/6 Glenthorne Mews
+44 (0)20 8817 4030 London, W6 0LJ, England
msabin@cromwellmedia.com http://www.cromwellmedia.com/
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