[gdal-dev] Possible to test for a layer capability before creating a layer?

[Even Rouault]

Le vendredi 19 février 2016 01:34:27, Nyall Dawson a écrit :
> On 19 February 2016 at 11:23, Even Rouault <even.rouault at spatialys.com> 
wrote:
> > Le vendredi 19 février 2016 00:55:21, Nyall Dawson a écrit :
> >> Hi all,
> >> 
> >> I'm aware that for drivers I can use OGR_Dr_TestCapability to
> >> determine whether a particular driver as a specific capability. But is
> >> there anyway to test whether a specific driver also has support for a
> >> layer capability?
> >> 
> >> The situation is that I'd like to populate a list with all available
> >> OGR drivers for which a created layer would then be able to support
> >> SequentialWrite, DeleteFeature, RandomWrite and CreateField.
> >> 
> >> What would be the best way to go about this?
> > 
> > There seems to be growing interests for such topic (see yesterday similar
> > thread :
> > https://lists.osgeo.org/pipermail/gdal-dev/2016-February/043782.html )
> 
> Yes, this would be very handy!
> 
> > The way to go is to add such capability flags at the driver metadata
> > level. This is now possible since GDAL 2.0 since OGR drivers can expose
> > arbitrary metadata items.
> > What has to be done :
> > - define which capabilities must be exposed
> > - enhance drivers to advertize them
> 
> Ok. Does this mean there's no approach which would work for past GDAL
> releases? (inc GDAL < 2.0)

Unless someone is sent back to the past, no ;-) (but I guess they would have 
more interesting things to fix or do)

> 
> Nyall
> 
> >> Nyall
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> > 
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