Thomas Jones-Low wrote:
Dennis Sosnoski wrote:
The Javolution pull parser is not an implementation of XMLPull - it's
similar in functionality, but that doesn't count where compatibility
is concerned. It's using CharSequence rather than String, which I
think is a good idea - I've suggested it in the past to the XPP3
team, but they haven't been very interested in pursuing it. The only
drawback to CharSequence is that it's strictly 1.4 and above.
My brain is slowly remembering this. I thought it would be a
simple thing to fix, but ended up digging deeper and deeper into the
JiBX code, and ultimately getting lost.
I'm not sure how much faster the Javolution parser really is, and
if it would make that much of a difference. But if someone really
needs that last bit of speed it may be an interesting idea.
It'd be interesting to try, but would require some pervasive changes to
be used consistently. The nastiest part is that using CharSequence would
break 1.3 compatibility. It's also possible that using the interface
would actually make things slower with other parsers (since going
through an interface was slower than direct calls to methods defined on
an object, at least the last time I checked - 1.3 or 1.4).
The only case where you'd see any gain from using CharSequence rather
than String is when the characters are being consumed by a conversion
process (as with ints, floats, etc.) rather than stored as Strings. The
most common primitive values are handled specially in the current
unmarshalling code, with type-specific method calls. You could try
changing UnmarshallingContext to use the Javolution parser and just
convert the CharSequence to a String for external consumption, while
using CharSequence versions of the conversion code for the primitive
types with special handling. I doubt it'd make a big difference in
performance, but I'd be interested in seeing the results.
- Dennis
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