[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Specifying options in SAX

  • From: <david@m...>
  • To: "xml-dev@i..." <xml-dev@i...>
  • Date: Wed, 27 Jan 1999 12:52:29 -0500 (EST)

optionen von sax2
james anderson writes:

 > Why not permit the application to bind an instance to perform the
 > respective operations. It's more powerful and no harder to
 > implement or to use?

I love it, but I don't think we should do it.

James's proposal, as I understand it, is an excellent design pattern:

  // This is how Java can do a strongly-typed enumeration...
  public final class Response {
    public final static int DONTCARE = new Response();
    public final static int YES = new Response();
    public final static int NO = new Response();
    private OptionResponse () {}

  public interface OptionManager {
    public abstract Response wantValidation ();
    public abstract Response wantNamespaces ();
    public abstract Response wantEntityExpansion ();

  public interface XParser extends Parser {
    // ...
    public void setOptionManager (OptionManager manager);

Unfortunately, SAX doesn't generally swing this way: note that there
is not a separate interface/class for each SAX event type either,
despite the fact that their absence makes the interface much more

Ironically, elegant and extensible design tends to steepen the
learning curve by multiplying interfaces and classes (how many people
ever learned SP's native interface?), and SAX's target audience has
not all read Gamma/Helm/Johnson/Vlissides.

Think of SAX as a low-level device driver -- it's ugly, but you can
build beautiful things on top of it (as many people on this list

All the best,


David Megginson                 david@m...

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


Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
First Name
Last Name
Subscribe in XML format
RSS 2.0
Atom 0.3

Stylus Studio has published XML-DEV in RSS and ATOM formats, enabling users to easily subcribe to the list from their preferred news reader application.

Stylus Studio Sponsored Links are added links designed to provide related and additional information to the visitors of this website. they were not included by the author in the initial post. To view the content without the Sponsor Links please click here.

Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.