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- From: John Cowan <firstname.lastname@example.org>
- To: XML Dev <email@example.com>
- Date: Fri, 13 Nov 1998 11:18:21 -0500
> This is much easier to handle with a SAX filter that implements both
> Parser and DocumentHandler and buffers the character data.
Which someone using my ParserFilter class can write in < 1 day.
> In fact, a string of filters (Chain of Responsibility in
> Design-Pattern-speak) can give users an awful lot of control for very
> little work.
You betcha. And because each filter component can specified by a Java
system property, chaining can be done at run time very neatly.
The highest level filter is specified as org.xml.sax.parser, and
each lower level is specified by <successor class name>.parser, thus:
sets up a chain where SAXDriver (the real parser) passes
to tinker, which passes to evers, which passes to chance, :-) which
passes to the application.
Of course all this can be set up programmatically too.
> All of this can be done above the parser/driver level, so
> there's no need to complicate SAX by including it in the core spec
> itself (except for including a canonical Filter interface).
> Yes, but how do we accomplish this? Do we invent a new package name
> for SAX 1.0.1 to avoid collision?
I think that would be better than new class names.
John Cowan http://www.ccil.org/~cowan firstname.lastname@example.org
You tollerday donsk? N. You tolkatiff scowegian? Nn.
You spigotty anglease? Nnn. You phonio saxo? Nnnn.
Clear all so! 'Tis a Jute.... (Finnegans Wake 16.5)
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