1 """

     2  This module houses the OGR & SRS Exception objects, and the

     3  check_err() routine which checks the status code returned by

     4  OGR methods.

     5 """

     6 #### OGR & SRS Exceptions ####

     7 class OGRException(Exception): pass

     8 class SRSException(Exception): pass

     9 class OGRIndexError(OGRException, KeyError):

    10     """

    11     This exception is raised when an invalid index is encountered, and has

    12     the 'silent_variable_feature' attribute set to true.  This ensures that

    13     django's templates proceed to use the next lookup type gracefully when

    14     an Exception is raised.  Fixes ticket #4740.

    15     """

    16     silent_variable_failure = True

    17 

    18 #### OGR error checking codes and routine ####

    19 

    20 # OGR Error Codes

    21 OGRERR_DICT = { 1 : (OGRException, 'Not enough data.'),

    22                 2 : (OGRException, 'Not enough memory.'),

    23                 3 : (OGRException, 'Unsupported geometry type.'),

    24                 4 : (OGRException, 'Unsupported operation.'),

    25                 5 : (OGRException, 'Corrupt data.'),

    26                 6 : (OGRException, 'OGR failure.'),

    27                 7 : (SRSException, 'Unsupported SRS.'),

    28                 8 : (OGRException, 'Invalid handle.'),

    29                 }

    30 OGRERR_NONE = 0

    31 

    32 def check_err(code):

    33     "Checks the given OGRERR, and raises an exception where appropriate."

    34     

    35     if code == OGRERR_NONE:

    36         return

    37     elif code in OGRERR_DICT:

    38         e, msg = OGRERR_DICT[code]

    39         raise e, msg

    40     else:

    41         raise OGRException('Unknown error code: "%s"' % code)