xml-dev - Re: SAX Proposal: new AttributesBuilder interface

[John Cowan <jcowan@reutershealth.com>]

James Strachan wrote:

> The implementation of XMLReader will come with a standard implementation of
> AttributesBuilder. But this new interface and method allows users of the
> XMLReader to override how to build an Attributes instance to use a more
> applicable data structure.

The trouble with this scheme is that it blocks a very common implementation
technique.  Since an Attribute object is valid only during a startElement
callback, there is no reason for a parser to ever instantiate more than
one such object, and indeed it is common for the SAXParser object to be
the object in question.

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