1 """

     2  This module holds the base `SpatialBackend` object, which is

     3  instantiated by each spatial backend with the features it has.

     4 """

     5 # TODO: Create a `Geometry` protocol and allow user to use

     6 # different Geometry objects -- for now we just use GEOSGeometry.

     7 from django.contrib.gis.geos import GEOSGeometry, GEOSException

     8 

     9 class BaseSpatialBackend(object):

    10     Geometry = GEOSGeometry

    11     GeometryException = GEOSException

    12 

    13     def __init__(self, **kwargs):

    14         kwargs.setdefault('distance_functions', {})

    15         kwargs.setdefault('limited_where', {})

    16         for k, v in kwargs.iteritems(): setattr(self, k, v)

    17  

    18     def __getattr__(self, name):

    19         """

    20         All attributes of the spatial backend return False by default.

    21         """

    22         try:

    23             return self.__dict__[name]

    24         except KeyError:

    25             return False

    26             

    27         

    28         

    29