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"""
This module holds the base `SpatialBackend` object, which is
instantiated by each spatial backend with the features it has.
"""
# TODO: Create a `Geometry` protocol and allow user to use
# different Geometry objects -- for now we just use GEOSGeometry.
from django.contrib.gis.geos import GEOSGeometry, GEOSException
class BaseSpatialBackend(object):
Geometry = GEOSGeometry
GeometryException = GEOSException
def __init__(self, **kwargs):
kwargs.setdefault('distance_functions', {})
kwargs.setdefault('limited_where', {})
for k, v in kwargs.iteritems(): setattr(self, k, v)
def __getattr__(self, name):
"""
All attributes of the spatial backend return False by default.
"""
try:
return self.__dict__[name]
except KeyError:
return False
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