a ‹'fh ã@s dZddlZddlZddlmZddlmZddlmZe  ej ¡e  d¡kr~ddl m Z dd l mZdd l mZdd d „Zn ddlmZdd„Zddd„ZdS)zèThis module provides utility functions for integrating with Shapely. .. note:: As GeoAlchemy 2 itself has no dependency on `Shapely`, applications using functions of this module have to ensure that `Shapely` is available. éN)Úversioné)Ú WKBElement)Ú WKTElementz1.7)Ú geom_factory)Ú WKBWriter)ÚlgeosFcKs\|dur0t |j¡}t ||¡t|ƒ}d|d<ttfi|¤Ž}|rN| |¡S| |¡SdS)a?Dump a WKB representation of a geometry to a byte or hex string. Args: ob (geometry): The geometry to export to well-known binary (WKB) representation hex (bool): If true, export the WKB as a hexadecimal string. The default is to return a binary string/bytes object. srid (int): Spatial reference system ID to include in the output. The default value means no SRID is included. Keyword Args: kwargs: See available keyword output settings in ``shapely.geos.WKBWriter``. NTZ include_srid)rZGEOSGeom_cloneZ_geomZ GEOSSetSRIDrrZ write_hexÚwrite)ÚobÚhexÚsridÚkwZgeomÚwriter©rú_/var/www/staging/api/virtual_environments/venv/lib/python3.9/site-packages/geoalchemy2/shape.pyÚdumpss    r)rcCst|ttfƒsJ‚t|tƒrTt|jtƒr2|jdfn t|jƒdf\}}tjj||dSt|tƒrŒ|j r~tj  |j  dd¡d¡Stj  |j¡SdS)a Function to convert a :class:`geoalchemy2.types.SpatialElement` to a Shapely geometry. Args: element: The element to convert into a ``Shapely`` object. Example:: lake = Session.query(Lake).get(1) polygon = to_shape(lake.geom) TF)r ú;rN) Ú isinstancerrÚdataÚstrÚbytesÚshapelyZwkbÚloadsÚextendedZwktÚsplit)Úelementrr rrrÚto_shape4s  "ÿ réÿÿÿÿcCs"ttt||r|nddƒ||dS)aGFunction to convert a Shapely geometry to a :class:`geoalchemy2.types.WKBElement`. Args: shape: The shape to convert. srid: An integer representing the spatial reference system. E.g. ``4326``. Default value is ``-1``, which means no/unknown reference system. extended: A boolean to switch between WKB and EWKB. Default value is False. Example:: from shapely.geometry import Point wkb_element = from_shape(Point(5, 45), srid=4326) ewkb_element = from_shape(Point(5, 45), srid=4326, extended=True) N)r )r r)rÚ memoryviewr)Úshaper rrrrÚ from_shapeLs ýr )FN)rF)Ú__doc__Z shapely.wkbrZ shapely.wktÚ packagingrÚelementsrrÚparseÚ __version__Zshapely.geometry.baserZ shapely.geosrrrrr rrrrÚs