[jdom-interest] Performance issues
venu_7278 at rediffmail.com
Wed Oct 17 22:29:48 PDT 2001
B'fore going to clear my query, i just need to know the usage of XERCERS in JDOM ???
just for some clarifications !!
On Wed, 17 Oct 2001 bob mcwhirter wrote :
> > JDOM internally uses XERCES / XALAN for
> parsing the XML Documents and gives an wrapper around
> for ease use of the XML with well know methods &
> > Thats one of the main adv. for using JDOM right !!!
> if anythign else clear me at this point.
> > Coming to realtime implementaion of JDOM we're
> supposed (atleat for our own implementaions) give an
> wrapper around the JDOM for our application access.
> > So, this create an three layers over the XML
> Document to access. First layer by XERCES(innermost),
> Second layer by JDOM and Third one is the our own
> layer(outermost) we're providing.
> > By using 3 layers, this gives an performance
> issues where the XML Datas are passed b/w 2 layers
> b'fore coming to the owr layer. Rather than using these
> 3 layers, we can provide One layer for accessing XML
> Docuemnts and our own layer.
> There really isn't a layer of objects from the
> Xerces/SAX layer.
> JDOM receives SAX events, and builds objects. Doesn't
> wrap anything
> provided by Xerces. JDOM does *not* provide a wrapper
> to DOM.
> It just converts events (energy) to objects (mass),
> following normal
> conservation-of-mass laws from physics.
> What's the point of your application's wrapper layer
> over the
> JDOM objects?
> Questions like this are always better if you can
> include a
> use-case of not what you're doing right now, but what
> attempting to do. Sure, you're wrapping JDOM objects,
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