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- From: "John Wilson" <tug@wilson.co.uk>
- To: "XML Developers' List" <xml-dev@ic.ac.uk>
- Date: Tue, 9 Mar 1999 16:06:03 -0000
----- Original Message -----
From: Glenn Vanderburg <glv@vanderburg.org>
To: Bill la Forge <b.laforge@jxml.com>
Cc: John Wilson <tug@wilson.co.uk>; XML Developers' List <xml-dev@ic.ac.uk>
Sent: 09 March 1999 15:40
Subject: Re: SAX: ModSAX addition, general property query
>Bill la Forge wrote:
>>
>> From: John Wilson <tug@wilson.co.uk>
>> >I don't think that it's unreasonable to insist that objects
>> >representing a Feature, Handler or Property should either implement
>> >a distinct interface or subclass a distinct class. If this is so
>> >the Parser can tell what Feature, Handler or Property is being set
>> >by enquiring of the type of the object.
>>
>> Filters often implement more than one (generally all) handler
>> interface and then register themselves with the underlying
>> parser/filter for the same events requested by the overlaying
>> application/filter.
>
>Yes, and as written, John's proposal would require distinct handler
>objects for each feature, which would be bad. However, with a slight
>modification, it would work beautifully. Instead of using a string
>as a feature ID, use a type descriptor (in Java, an instance of
>java.lang.Class). Feature handlers would be registered by supplying
>the Class object that represents the feature being implemented, along
>with a handler object that is assignable to that type.
This seems to me to be an excellent suggestion;)
John Wilson
The Wilson Partnership
5 Market Hill, Whitchurch, Aylesbury, Bucks HP22 4JB, UK
+44 1296 641072, +44 976 611010(mobile), +44 1296 641874(fax)
Mailto: tug@wilson.co.uk
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