app/django/contrib/gis/db/backend/base.py
author Sverre Rabbelier <srabbelier@gmail.com>
Fri, 13 Feb 2009 19:22:34 +0000
changeset 1298 a04ab9bd300a
parent 323 ff1a9aa48cfd
permissions -rw-r--r--
Fixes as requested by Leslie on behalf of the Legal team Upped the copyright statement from 2008 to 2009, and link to the GAE Terms of Service instead of any custom ToS. Patch by: Sverre Rabbelier

"""
 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