[Gdal-dev] RFC 10: OGR Open Parameters
dmorissette at mapgears.com
Tue Mar 13 10:03:44 EDT 2007
Andrey Kiselev wrote:
> I have prepared new proposal regarding changes in OGR Open() functions.
> Please, add your comments and criticism:
Do we have an idea of how many third party OGR drivers exist that would
be impacted by that change? (i.e. not counting the drivers that are in
the GDAL SVN repository).
Actually, could we not avoid any backwards compatibility issue by
playing with the fact that the three Open() methods are virtual?
The base classes could define a default implementation for the new
method that just maps the call to the old method without the
OGRSFDriverRegistrar::Open( const char * pszName, int bUpdate,
OGRSFDriver ** ppoDriver,
char **papszOptions /*= NULL*/ )
/* Map this call to the old/deprecated GDAL 1.4.0 Open() method
* for drivers that do not implement the new Open() method added
* in GDAL 1.5.0+
return Open( pszName, bUpdate, ppoDriver );
If I'm not mistaken, this way old drivers would continue to work even if
they do not define the new Open() method... and upgraded drivers that
override the new Open() method could take advantage of the new
More information about the Gdal-dev