OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help



   Re: multiple handlers

[ Lists Home | Date Index | Thread Index ]
  • From: David Megginson <ak117@freenet.carleton.ca>
  • To: "Michael Kay" <M.H.Kay@eng.icl.co.uk>
  • Date: Tue, 24 Feb 1998 13:51:04 -0500

Michael Kay writes:

 > >In a private message, one SAX user raised the issue again of multiple
 > >handlers
 > >Any further thoughts on this issue?
 > >
 > I've implemented a layer on top of SAX that provides not only multiple
 > handlers, but also per-element-type handlers. Since it is trivial to
 > implement this on top of SAX, I suggest it shouldn't go into SAX itself.

I had this same thought when I was walking my girls to school after
lunch.  Unlike a GUI, which spends most of its time waiting for the
user to do something interesting, an XML parser has to deal with
hundreds or thousands of events each second, and perhaps millions of
events in a hefty XML document.  

Upon reflection, I am becoming more inclined to agree with the
arguments that people made in the first round, that the overhead of
walking through a vector of handlers and delivering each event to each
one can be excessive.  Besides, as Michael rightly points out,
implementing a multi-listener interface on top of SAX is trivial if
you really need it.

All the best,


David Megginson                 ak117@freenet.carleton.ca
Microstar Software Ltd.         dmeggins@microstar.com

xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@ic.ac.uk
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/
To (un)subscribe, mailto:majordomo@ic.ac.uk the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo@ic.ac.uk the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa@ic.ac.uk)


News | XML in Industry | Calendar | XML Registry
Marketplace | Resources | MyXML.org | Sponsors | Privacy Statement

Copyright 2001 XML.org. This site is hosted by OASIS