+
−"""
+
− 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 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)