SAX: External Entity Start and End (question 2 of 10)
Paul Prescod
papresco at technologist.com
Mon Jan 5 11:06:08 GMT 1998
David Megginson wrote:
>
> The only way that I can resolve this correctly is if I know the URI of
> the current external entity. In Lark, you provide this information
> with a separate Entity argument to each callback; this is a legitimate
> (and more powerful) option, but from the perspective of SAX, it ends
> up complicating the entire API instead of just adding two
> easily-ignored callbacks.
It is possible to have "invisible arguments" to a callback that do not
complicate the interface. This sounds very mysterious, but an "invisible
argument" is just a variable whose value can be fetched through a parser
method. getCurrentEntity() or getFileEncoding() would be examples.
I think that this is the right way to handle this entity problem.
Require the parser to track the information rather than the application.
Paul Prescod
--
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