Re: SAX: 1998-04-18 pre-release

David Megginson (ak117@freenet.carleton.ca)
Sun, 19 Apr 1998 07:53:29 -0400


James Clark writes:

> Making the read methods on ByteStream and CharacterStream throw
> SAXException seems wrong to me. In a Java environment I need to be able
> to throw an IOException. So they should be declared as throwing either
> Exception or IOException. The approach in InputStreamAdapter of just
> passing through the message from IOExceptions is not acceptable. An
> application may need to deal with different classes of IOExceptions
> differently, so it needs to be possible to propagate the IOException up
> to Parser.parse.

It would be easiest to have them throw Exception, since IOException
describes a constraint that will not make sense for a ByteStream or
CharacterStream implemented in another language. I have just made
this change now, and the only difficulty comes in the optional
CharacterStreamAdapter and ByteStreamAdapter classes, where I have to
wrap the message from non-IOExceptions in an IOException.

All the best,

David

-- 
David Megginson                 ak117@freenet.carleton.ca
Microstar Software Ltd.         dmeggins@microstar.com
      http://home.sprynet.com/sprynet/dmeggins/

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