1 files changed, 29 insertions, 0 deletions
diff --git a/webapp/django/contrib/gis/db/backend/base.py b/webapp/django/contrib/gis/db/backend/base.py
new file mode 100644
index 0000000000..d45ac7b6f1
--- /dev/null
+++ b/webapp/django/contrib/gis/db/backend/base.py
@@ -0,0 +1,29 @@
+"""
+ 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
+            
+        
+        
+