Can't read xml with a Reader?

hi,
is it correct that the java Reader classes for reading character streams can't be used for reading XML (in one-pass)?
ie you don't know what encoding to read the file as until you've read the encoding attribute of the top level tag - and by then its too late - you'd have to start again?
(i think this is how xml parsers must work?)
thanks,
asjf

to be honest this was motivated by wanting a quick method to remove the DTD reference from an inputstream, without having to worry about whichever XML API was in use further down in the code (we've since settled on a particular API so this is no longer an issue)
I've been told there are 2 legitimate ways to do this (with the help of the parser)
A) configure the parser (parser-implementation-dependent)
B) in SAX, provide an EntityResolver
Last year I had opted for a gratuitous munge-around by manually reading the inputstream and removing the DTD reference
this year we've started working with chinese documents.. so the code doesn't work since I was using the platform-encoding rather than the xml-declared encoding
its pretty clear that (B) is the way to go but there are a few other technical hurdles to overcome first..
i'm beginning to think that /all/ quick-workarounds come back to bite you soon enough..

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