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Re: More on taming SAX (was Re: ANN: Amara XMLToolki

• To: lists@j...
• Subject: Re: More on taming SAX (was Re: ANN: Amara XMLToolkit 0.9.0)
• From: Karl Waclawek <karl@w...>
• Date: Thu, 23 Dec 2004 14:17:22 -0500
• Cc: Uche Ogbuji <uche.ogbuji@f...>, xml-dev@l...
• In-reply-to: <41CB11D1.50600@j...>
• References: <1103757598.10272.67.camel@borgia> <20041223055359.GK25900@s...> <1103791522.4600.68.camel@borgia> <1103792754.4600.81.camel@borgia> <41CB11D1.50600@j...>
• User-agent: Mozilla Thunderbird 1.0 (Windows/20041206)

Jeff Rafter wrote:

> Karl Waclawek has done some work in this area in both Delphi and C# in 
> his toolkit XPEA. But I am sure he will take some ideas from this thread 
> as well... it is all very interesting.

Well, XPEA really is a very low level way of building
some pattern matching on top of SAX (or other push APIs).
Predicate processing as well as attribute matching is done
through call-backs. I am not a big believer in inventing
new languages - my ambitions are a lot more modest.

Example (C# 2.0 syntax):

   IXmlReader reader;
   ...
   SaxPathDispatcher<EventStatus> disp = new SaxPathDispatcher<EventStatus>();
   disp.AttachTo(reader);
   /* Path related set-up */
   Div1Handler div1 = new Div1Handler(...);
   Div2Handler div2 = new Div2Handler(...);
   BasicPathFactory pathFactory = new BasicPathFactory(...);
   // Add path with call-back arguments: "/spec/*//div1[div1]/div2[div2]"
   BasicPath path = pathFactory.Create("/spec/*//div1[0]/div2[1]", div1, div2);
   path.AddTo(disp.Paths);
   ...
   reader.Parse(input);

Div1Handler and Div2Handler are implementations of the IElementHandler
interface and their events are called when they match the path above.
Really just one step more than SAX. I use it for writing SAX-based
transformations.

Karl

• Follow-Ups:
  • Re: More on taming SAX (was Re: ANN: Amara XMLToolkit 0.9.0)
    • From: Uche Ogbuji <uche.ogbuji@f...>

• References:
  • ANN: Amara XML Toolkit 0.9.0
    • From: Uche Ogbuji <uche.ogbuji@f...>
  • Re: ANN: Amara XML Toolkit 0.9.0
    • From: Uche Ogbuji <uche.ogbuji@f...>
  • More on taming SAX (was Re: ANN: Amara XML Toolkit 0.9.0)
    • From: Uche Ogbuji <uche.ogbuji@f...>
  • Re: More on taming SAX (was Re: ANN: Amara XMLToolkit 0.9.0)
    • From: Jeff Rafter <lists@j...>

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