Re: [Vtd-xml-users] Fw: Problems with VDT (fwd)

[Tatu S. <cow...@ya...>]

--- Jimmy Zhang <cra...@co...> wrote:

> How many different kind of encoding does woodstox
> currently support??

Natively just couple (UTF-8, ISO-8859-1, UTF-32),
first 2 for performance reasons, third because JDK
doesn't support it. Others are handled by using JDK
constructed Reader. EBCDIC doesn't yet work; I'm not
sure what'd be the best way (JDK may have some
decoders, but I don't know exactly which ones to use,
nor have many sample docs). It's nice to be able to
use JDK decoders as a fallback. With NIO, perhaps
VTD-XML could use them too?

I have been thinking of writing my own UTF-16
decoder/encoder, for performance reasons and to be
able to do better character validation, but haven't
had time.

> I am thinking about adding more encoding support
> right now VTD-XML supports
> support UTF8 ascii iso-8859 UTF-16BE and UTF-16LE

That's a reasonable starting point I think.
UTF-32 is quite easy to support, but I don't know if
many use it (there were same test docs though, in
XMLTest test suite). Other iso-8859-x encodings beyond
-1 might be easy too: you just have to map byte values
128 - 255 to other parts of Unicode tables (I think).

-+ Tatu +-


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