Introduce dynamic scope_path regexps
Instead of relying on scope_path's being "one slash deep", we should
instead allow for either:
1. scope_paths that have a pre-defined depth
2. scope_paths that can be arbitrarily deep
We achieve 1 by setting an entities scope_logic to another logic
module. We then recursively call getScopeDepth until we get to the
topmost entity (that is, an unscoped entity).
A little different is the solution to 2, since some entities can have
an arbitrarily deep scope (such as Documents), we need to have some
way of signaling this to getScopePattern. A clean solution is to
return None, rather than a number. If None is returned, the
SCOPE_PATH_ARG_PATTERN is returned as regexp instead, which will
match an arbitrarily deeply nested scope.
The solution for 2 requires that we return None somewhere in the
scope_logic chain, the most straight forward method to do so is to
override getScopeDepth anywhere such a scope is needed and make it
return None. A more elegant solution however, is to set the
scope_logic to that module in all entities that require it.
Patch by: Sverre Rabbelier
"""
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)