On Sat, Jan 29, 2011 at 12:47 PM, Jody Garnett <[email protected]> wrote:
> Okay; let us get this one moving.
>
> I ambushed aaime on his weekend to see if this was slated for gt-api as a 
> simple patch; or if it would go through the proposal process.
>
> My initial thought was that this should be handled in a similar fashion to 
> the other marker interface we have in there:
>
>> public interface BoundedSpatialOperator extends SpatialOperator {
>> }
>
> This is a marker interface used on spatial filters that can be optimised with 
> a bounding box query up front.
>
> With that in mind I was thinking of:
>
> package org.opengis.filter.expression;
> public interface VolitileFunction extends Function {
> }
>
> Q: Why gt-opengis?
> A: It is next to the other filter stuff and thus can be easily found; there 
> are already marker interfaces present so it is in good company
>
> Q: Isn't this just an implementation detail that can be placed in gt-main?
> A: No; we need to commit to it as public api; so implementations can 
> communicate to us how their function is to be used?

Works for me.
Just a question: is a proposal required for this one?

The patch would involve three changes:
- adding the new interface
- modifying the simplifying filter visitor to use it in order to
simplify out function calls
- adding the marker to random

All in all the patch may be a few kb (if it reaches a kb at all), so
pretty small.
Then again it's an api addition

Your call, the proposal is going to be a copy and past of my previous
mail anyways,
no big deal for me

Cheers
Andrea


-- 
Ing. Andrea Aime
Technical Lead

GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054  Massarosa (LU)
Italy

phone: +39 0584962313
fax:     +39 0584962313

http://www.geo-solutions.it
http://geo-solutions.blogspot.com/
http://www.linkedin.com/in/andreaaime
http://twitter.com/geowolf

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