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

[James Strachan <james@metastuff.com>]

----- Original Message -----
From: "John Cowan" <jcowan@reutershealth.com>
> 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.

I don't think it does block this technique. The SAX Parser must have at
least one Attributes implementation somewhere to be able to call the SAX
ContentHandler. If a particular SAX Parser wants to keep the same Attributes
object throughout the entire parsing of a document, it can do that by
implementing its own default AttributesBuilder to return the same Attributes
object instance.

e.g. the SAX Parser could implement both the Attributes and
AttributesBuilder interfaces and return "this" in the
AttributesBuilder.createAttributes() method.

It is only in those cases where a SAX user (such as JDOM) wants to override
the AttributesBuilder that new Attributes objects would get created for each
element.

J.

James Strachan
=============
email: james@metastuff.com
web: http://www.metastuff.com




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