ModSAX: Proposed Core Properties
david at megginson.com
Wed Mar 17 21:15:17 GMT 1999
Ronald Bourret writes:
> David Megginson wrote:
> > So far, for consistency, I've made all pre-parse properties
> > write-only and all parse-time properties read-only. We'll have
> > to think about this one.
> What is the possible benefit of making any property write-only?
> That is, can any harm ever come from reading a property?
There are three benefits:
1. Keep the API absolutely as small as possible.
2. Avoid confusion.
3. Allow properties to be unknown until set.
Any attempt to access a property can generate a
SAXNotSupportedException (or the derived SAXNotRecognizedException),
but there is no guarantee that they will be symmetrical. For example,
a driver built on top of a parser might allow you to set the namespace
separator but not to query it, or vice-versa.
All the best,
David Megginson david at megginson.com
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