Thanks Andrea for the pointers,

I am working on it, although it is becoming more painful that I expected.
Anyway, I will create a pull request when it is ready, then we can
discuss if it is suitable to be included in trunk.

Best regards,

César

On 23 February 2018 at 18:01, Andrea Aime <[email protected]> wrote:
> Hi Cesar,
> sure, it seems like a nice addition.
>
> Just in case you have not found these already, here are the contribution
> guides:
> http://docs.geotools.org/latest/developer/procedures/contribute.html
> https://github.com/geotools/geotools/blob/master/CONTRIBUTING.md
>
> If you have any questions, ask away :-)
>
> Cheers
> Andrea
>
>
> On Fri, Feb 23, 2018 at 3:24 PM, César Martínez Izquierdo
> <[email protected]> wrote:
>>
>> Hi,
>>
>> We are evaluating using Geotools as the basis for our CRS management
>> libraries on gvSIG project (a desktop, Java-based GIS application).
>>
>> We have performed some tests to ensure we can implement all our
>> current use-cases using Geotools. Most of them can be easily
>> implemented, but I don't find an evident way to list available
>> operations to convert/transform between two CRSs (when more than one
>> operation is available on the EPSG database).
>>
>> I am aware it is possible to use CRS.findOperation(source, target) to
>> get "the preferred operation", but in this way we can't offer the
>> users the possibility to choose the transformation themselves.
>>
>> Ideally, I would expect a method like:
>> Set<CoordinateOperation> ops = CRS.findOperations(source, target);
>>
>> which would mean adding a new method in CoordinateOperationFactory:
>>
>> Set<CoordinateOperation> listOperations(sourceCRS, targetCRS)
>>
>> I believe it would be quite simple to add this method in
>> CoordinateOperationFactory. As far as I've seen, it would need some
>> changes in DefaultCoordinateOperationFactory,
>> BufferedCoordinateOperationFactory and AuthorityBackedFactory, but
>> they are mostly method additions and some code refactoring.
>>
>> We are wondering if you would accept this contribution, as it is
>> currently the main blocker for going forward.
>>
>> Best regards,
>>
>> César Martínez Izquierdo
>>
>>
>>
>>
>> --
>> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
>>    César Martínez Izquierdo
>>    GIS developer
>>    -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -
>>    SCOLAB: http://www.scolab.es
>> - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
>>
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>
>
>
>
> --
>
> Regards,
>
> Andrea Aime
>
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-- 
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
   César Martínez Izquierdo
   GIS developer
   -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -  -
   SCOLAB: http://www.scolab.es
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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