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- """
- This module houses the OGR & SRS Exception objects, and the
- check_err() routine which checks the status code returned by
- OGR methods.
- """
- #### OGR & SRS Exceptions ####
- class GDALException(Exception):
- pass
- class OGRException(Exception):
- pass
- class SRSException(Exception):
- pass
- class OGRIndexError(OGRException, 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
- #### OGR error checking codes and routine ####
- # OGR Error Codes
- OGRERR_DICT = {
- 1: (OGRException, 'Not enough data.'),
- 2: (OGRException, 'Not enough memory.'),
- 3: (OGRException, 'Unsupported geometry type.'),
- 4: (OGRException, 'Unsupported operation.'),
- 5: (OGRException, 'Corrupt data.'),
- 6: (OGRException, 'OGR failure.'),
- 7: (SRSException, 'Unsupported SRS.'),
- 8: (OGRException, 'Invalid handle.'),
- }
- OGRERR_NONE = 0
- def check_err(code):
- "Checks the given OGRERR, and raises an exception where appropriate."
- if code == OGRERR_NONE:
- return
- elif code in OGRERR_DICT:
- e, msg = OGRERR_DICT[code]
- raise e(msg)
- else:
- raise OGRException('Unknown error code: "%s"' % code)
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