Andrea,
Thanks for mentioning the PropertyAccessors! I had seen them, but I
hadn't had a chance to figure them out.
With context and reading through now, they make a great deal of sense.
It seems like with an hour or two and dependencies on gt-api and gt-cql,
one could wire up CQL filtering to a custom classes. Neat.
Do folks think this should be documented? I'm mildly amused by this
since I've mucked with CQL a bit.
Thanks,
Jim
On 03/15/2015 03:19 PM, Andrea Aime wrote:
On Sun, Mar 15, 2015 at 8:06 PM, Stephen Brooke
<sbro...@mdacorporation.com <mailto:sbro...@mdacorporation.com>> wrote:
Any further thoughts you may have on this are much appreciated,
Here is another option to consider.
CQL parses to Filter, which in turn evaluates an Object, not a Feature.
So how do we evaluate properies against a random object? Using
property accessors,
which can be registered in SPI:
http://docs.geotools.org/latest/javadocs/org/geotools/filter/expression/PropertyAccessor.html
So you could write your own property accessor that knows how to
extract the properties out of
your objects, instead of converting them to simple features.
I don't think we have docs on how to write an accessor (this is kind
of advanced stuff, Jody please
correct me if I'm wrong) but have a look at PropertyAccessor sublasses
with your IDE, and see how they are getting
registered in SPI checking the META-INF/services directory in the same
geotools module
Cheers
Andrea
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