--- Tom Fennelly <[EMAIL PROTECTED]> wrote:
> Hi there.
>
> I have a 2Gb message (file based) and was wondering
> could I transform it
> using Xalan. I tried (supplying as a StreamSource)
> and it bombed out
> (OOM errors). I actually tried then with smaller
> files and went down to
> 100M and it's still bombing out. Am I doing
> something wrong?
The only realistic way with xsl would be processing
such data subtree by subtree. With 100 meg docs, you'd
need 400-500 megs just to hold DOM tree (or such) in
memory (typical memory usage for DOM is 3x - 5x size
of input doc; part is from utf8 -> Java's 2-byte char
expansion, rest object/structural overhead).
Aside from possibly using SAX, StAX may be bit simpler
to use for explicitly written conversion code.
There is also a streaming alternative to xsl called
stx, which might work for you if you prefer
declarative style.
Hope this helps,
-+ Tatu +-
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