Justin Deoliveira wrote:
I am trying to build a ui to capture the paramters to a datastore. A
nice feature would be for a paramter to specify whats its allowable
values are,
For instance, the indexed shapefile data store contains a paramter
that specifies what type of index to create: rtree, quadtree, etc..
However based on the paramter itself, there is no way to infer that
these are the allowable values.
So i guess my idea is to add a method to DataStoreFactorySpi.Param
that would look like this;
List getAllowableValues() {
return null;
}
with the default implementation just returning null but allowing
subclasses to override if need be.
Not sure if this one will be a big hit, I thought I would throw it out
there anyways.
Yeah - this is why I put so much time into the ParameterGroup stuff used
by GCE and CRS. It has some of these problems solved, but is still very
difficult.
One of the best ideas was to go straight to a Java Bean configuration
object, problem is Java BeanInfo classes do not play nice with
localization (witness the crazy hacking to change locale for the
validation configuration section in geoserver).
I still am fond of the parameter model used by ISO 19119, see diagrams
in this document:
-<http://udig.refractions.net/docs/WRS.pdf>
I would also remind you of the difference between identification, and
configuration. It could be that you should make the DataStore based on
the URL, and then have an API to configure the Datastore for your
specific application. Although truth be told that should probably occur
on a FeatureSource by FeatureSource basis so that different threads can
do what is right for them ...
Jody
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