Re: DOM vs JDOM

[Uche Ogbuji <uche.ogbuji@fourthought.com>]

> SNedunuri@pav.com wrote:
> > In their article Easy Java/XML integration with JDOM, Part 1 in JavaWorld,
> > http://www.javaworld.com/javaworld/jw-05-2000/jw-0518-jdom.htm
> > Hunter and McLaughlin say: "DOM represents a document tree fully held in
> > memory."
>
> This is a statement to promote their project and generate FUD for the
> DOM.  While I like JDOM and have my complaints about the DOM, there's
> not much difference between JDOM and most DOM implementations other than
> the fact that JDOM isn't interface and factory-based.
>
> > Is there anything inherent in the DOM interface that requires the document
> > to be held in memory? Why does the DOM interface require that a document be
> > fully held any more than the JDOM interface does?
>
> There is nothing that requires a DOM tree to be held in memory other
> than the DOM implementation itself.  Lazy DOMs allow you to
> incrementally retrieve and traverse DOM trees, I believe the Xerces
> project was working on such a beast, and the dbXML DOM is partially a
> lazy DOM.

Yep.  4Suite's DbDom is also a lazy DOM.  I agree that the claims quoted
from the article are disingenuous.


-- 
Uche Ogbuji                               Principal Consultant
uche.ogbuji@fourthought.com               +1 303 583 9900 x 101
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