[XML-SIG] The '_' thingy
Mon, 26 Jun 2000 18:21:09 -0600
Jim Fulton wrote:
> Mike Olson wrote:
> > So, I think I see this as a general concensius:
> Are you kidding?
No. '_' issues aside I think most people want attribute access. I
didn't tally a vote or anything, but that was the sense I got. Am I
> > 1. DOM will never (in forseeable future) be used over an ORB, so the
> > IDL should be used as a guide.
> Uh, this doesn't make sense.
We don't need to stick strickly to IDL (I don't think that was the
original intention), because we won't be doing distributed DOM for a
> > 2. Most people will access the DOM via attributes.
> Who says? What do you have to support this? Most people
> will access the DOM through whatever interface we define.
Again, just the sense I got.
So where are we at on the attribute vs. accessor debate?
I throw in my hat for attribute
> Whatever path we start down, it should begin with a draft
> that documements the DOM mapping for Python.
Agreed, but I think we can work out some of the larger issues on the
> > A
> > langauge mapping is something we can put into the next release of 4DOM
> > (something we've been meaning to do any ways). The rest of the cahnges
> > are actually in place (unless we define a different callback naming
> > convention). We will be slowly depricating _get_* soon as well.
> > However we will still need __setattr__ callbacks in some cases....
> In summary, I think using attribute-based access for the Python DOM
> API would be a mistake because it will make efficient DOM implementations
> harder than necessary to create. I'd prefer to see accessor functions used
> to provide access to DOM attributes.
> There has, however, been relatively lettle discussion on this.
> I'm curious what opinions others have.
Jim, I don't see your arguements.
How is n.firstChild less efficent the n.get_firstChild() ?
In the first, you modfy appendChild, et al and at the end put in if
self.childNodes == newNode: self.firstChild = newNode
In the second you do a "return self.childNodes"
I don't see a major memory or speed difference? You can do the same for
all other attributes.
I don't see how accessors call get around circular references either.
Believe me we have tried with this one. We have come up with a few
schemes in our time, proxied nodes and such, but nothing that made it
worth the overhead. Its much simplier/efficient to have a utility
function to clean up a tree if you need it too.
> Jim Fulton mailto:firstname.lastname@example.org Python Powered!
> Technical Director (888) 344-4332 http://www.python.org
> Digital Creations http://www.digicool.com http://www.zope.org
> Under US Code Title 47, Sec.227(b)(1)(C), Sec.227(a)(2)(B) This email
> address may not be added to any commercial mail list with out my
> permission. Violation of my privacy with advertising or SPAM will
> result in a suit for a MINIMUM of $500 damages/incident, $1500 for
Mike Olson Principal Consultant
email@example.com (303)583-9900 x 102
Fourthought, Inc. http://Fourthought.com
Software-engineering, knowledge-management, XML, CORBA, Linux, Python