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Fw: SAX: Next Round

• From: "Bill la Forge" <b.laforge@j...>
• To: "John Cowan" <cowan@l...>
• Date: Fri, 22 Jan 1999 11:55:11 -0500

John,

Looks like the list server chopped things off when a '.' was the only thing
on the line.

Bill
-----Original Message-----
From: Bill la Forge <b.laforge@j...>
To: Lars Marius Garshol <larsga@i...>; XML Developers' List <xml-dev@i...>
Date: Friday, January 22, 1999 8:49 AM
Subject: Re: SAX: Next Round


>>I agree with this in the sense that the FilterManager should not be
>>specified by SAX, however, the actual Filters themselves should, I
>>think, be specified.
>>
>>The goal must be that both views should be supportable by any SAX
>>Filter, allowing the same filters to be reused in MDSAX, Cowans model
>>and in any other filter models that may spring up later.
>>
>>I think the best way to achieve this is to use interfaces that present
>>different views of the Filter, essentially what I yesterday (yesterday
>>for me, anyway :) called the 'separate interfaces' model.
>>
>>I'll see if I can find the time tomorrow to devise a design that
>>allows this.
>
>
>Lars,
>
>I think the answer is staring us right in the face. Look at John's
>ParserFilter:
>
>public abstract class ParserFilter
> implements Parser, AttributeList,
> DocumentHandler, DTDHandler, EntityResolver, ErrorHandler {
>.
>.
>.
>}
>
>Now that's a lot of interfaces. Lets say we simplify this just a tad...
>
>public abstract class Filter
> implements Parser, DocumentHandler, DTDHandler, EntityResolver, ErrorHandler {
>
>        public Filter()
>        {
>        }
>
>        public void setSourceParser(Parser sourceParser)
>        {
>                sourceParser.setDocumentHandler(this);
>                sourceParser.setDTDHandler(this);
>                sourceParser.setEntityResolver(this);
>                sourceParser.setErrorHandler(this);
>        }
>
>        public void setDestinationFilter(Filter destinationFilter)
>        {
>                destinationFilter.setSourceParser(this);
>        }
>
>}
>
>This is a minor generalization of ParserFilter which could also serve as a 
>basis for MDSAX.
>
>Bill
>


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