ó J~‰Pc@s@dZddlmZddlmZdefd„ƒYZdS(sų The GeometryProxy object, allows for lazy-geometries. The proxy uses Python descriptors for instantiating and setting Geometry objects corresponding to geographic model fields. Thanks to Robert Coup for providing this functionality (see #4322). i’’’’(t memoryview(tsixt GeometryProxycBs&eZd„Zdd„Zd„ZRS(cCs||_||_dS(sp Proxy initializes on the given Geometry class (not an instance) and the GeometryField. N(t_fieldt_klass(tselftklasstfield((s;../Django//lib/python/django/contrib/gis/db/models/proxy.pyt__init__ s cCsˆ|dkr|S|j|jj}t||jƒr>|}nF|dksV|dkr_d}n%|j|ƒ}t||jj|ƒ|S(sź This accessor retrieves the geometry, initializing it using the geometry class specified during initialization and the HEXEWKB value of the field. Currently, only GEOS or OGR geometries are supported. tN(tNonet__dict__Rtattnamet isinstanceRtsetattr(Rtobjttypet geom_valuetgeom((s;../Django//lib/python/django/contrib/gis/db/models/proxy.pyt__get__s   cCsŹ|jj}t||jƒrit|jƒjƒ|ksE|dkri|jdkr³|jj|_q³nJ|dks³t|tj t fƒr‘n"t d|j j t|ƒfƒ‚||j|jj<|S(sĢ This accessor sets the proxied geometry with the geometry class specified during initialization. Values of None, HEXEWKB, or WKT may be used to set the geometry as well. tGEOMETRYs2cannot set %s GeometryProxy with value of type: %sN(Rt geom_typeR RtstrtuppertsridR Rt string_typesRt TypeErrort __class__t__name__RR R (RRtvaluetgtype((s;../Django//lib/python/django/contrib/gis/db/models/proxy.pyt__set__,s 9%"N(Rt __module__RR RR(((s;../Django//lib/python/django/contrib/gis/db/models/proxy.pyR s  N(t__doc__tdjango.contrib.gisRt django.utilsRtobjectR(((s;../Django//lib/python/django/contrib/gis/db/models/proxy.pyts