[fdo-users] How does FDO handle invalid fgf geometries?

[Mateusz Loskot]

Jackie Ng wrote:
> Hi All,
> 
> How does FDO handle invalid FGF binary data?

Jackie,

 From my experience, I've observed that FDO does not strictly
validate FGF/WKB input on geometry creation.
Actually, GeometryFactory checks if WKB stream has minimal length of 9 
bytes and it does not prevent to create geometry from bytes stream of 
garbage.

Here is a small test of valid and invalid WKB input (see main function):

http://mateusz.loskot.net/tmp/fdo/test_geometry_factory.cpp.html

This is the result of 3 test cases included in the test:

Expected WKT: POINT(15.123 21.456)
Output WKT  : POINT (-7.84591113289983e+298 0)

Expected WKT: POINT(15.123 21.456)
Output WKT  : POINT (15.123 21.456)

*** FDO Error:
   *** (.\Src\Geometry\Fgf\GeometryFactory.cpp: 568) 
FDO_1_INVALID_INPUT_ON_CLASS_CREATION


Best regards,
-- 
Mateusz Loskot, http://mateusz.loskot.net
Charter Member of OSGeo, http://osgeo.org