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"""
This module houses the GDAL & SRS Exception objects, and the
check_err() routine which checks the status code returned by
GDAL/OGR methods.
"""
# #### GDAL & SRS Exceptions ####
class GDALException(Exception):
pass
# Legacy name
OGRException = GDALException
class SRSException(Exception):
pass
class OGRIndexError(GDALException, KeyError):
"""
This exception is raised when an invalid index is encountered, and has
the 'silent_variable_feature' attribute set to true. This ensures that
django's templates proceed to use the next lookup type gracefully when
an Exception is raised. Fixes ticket #4740.
"""
silent_variable_failure = True
# #### GDAL/OGR error checking codes and routine ####
# OGR Error Codes
OGRERR_DICT = {
1: (GDALException, 'Not enough data.'),
2: (GDALException, 'Not enough memory.'),
3: (GDALException, 'Unsupported geometry type.'),
4: (GDALException, 'Unsupported operation.'),
5: (GDALException, 'Corrupt data.'),
6: (GDALException, 'OGR failure.'),
7: (SRSException, 'Unsupported SRS.'),
8: (GDALException, 'Invalid handle.'),
}
# CPL Error Codes
# http://www.gdal.org/cpl__error_8h.html
CPLERR_DICT = {
1: (GDALException, 'AppDefined'),
2: (GDALException, 'OutOfMemory'),
3: (GDALException, 'FileIO'),
4: (GDALException, 'OpenFailed'),
5: (GDALException, 'IllegalArg'),
6: (GDALException, 'NotSupported'),
7: (GDALException, 'AssertionFailed'),
8: (GDALException, 'NoWriteAccess'),
9: (GDALException, 'UserInterrupt'),
10: (GDALException, 'ObjectNull'),
}
ERR_NONE = 0
def check_err(code, cpl=False):
"""
Checks the given CPL/OGRERR, and raises an exception where appropriate.
"""
err_dict = CPLERR_DICT if cpl else OGRERR_DICT
if code == ERR_NONE:
return
elif code in err_dict:
e, msg = err_dict[code]
raise e(msg)
else:
raise GDALException('Unknown error code: "%s"' % code)
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