U
    û‚ºe¸  ã                   @   sR   d dl Z d dlmZmZ d dlmZ d dlmZ G dd„ deƒZG dd„ dƒZ	dS )	é    N)ÚCoordTransformÚSpatialReference©ÚSerializerDoesNotExist)Ú
Serializerc                       sP   e Zd ZdZ‡ fdd„Zdd„ Zdd„ Z‡ fdd	„Zd
d„ Z‡ fdd„Z	‡  Z
S )r   z<
    Convert a queryset to GeoJSON, http://geojson.org/
    c                    sn   t ƒ  ¡  | j dd ¡| _| j dd ¡| _| j dd¡| _| jd k	rj| jd k	rj| j| jkrj| j| jf•| _d S )NÚgeometry_fieldÚid_fieldÚsridiæ  )ÚsuperÚ_init_optionsZjson_kwargsÚpopr   r   r	   Úselected_fields©Úself©Ú	__class__© úJ/tmp/pip-unpacked-wheel-lctamlir/django/contrib/gis/serializers/geojson.pyr      s    
ÿþ
ýzSerializer._init_optionsc                 C   s$   |   ¡  i | _| j d| j ¡ d S )Nzg{"type": "FeatureCollection", "crs": {"type": "name", "properties": {"name": "EPSG:%d"}}, "features": [)r   Ú_ctsÚstreamÚwriter	   r   r   r   r   Ústart_serialization   s    þÿzSerializer.start_serializationc                 C   s   | j  d¡ d S )Nz]})r   r   r   r   r   r   Úend_serialization"   s    zSerializer.end_serializationc                    sD   t ƒ  |¡ d | _| jd kr@|jjD ]}t|dƒr$|j| _ q@q$d S )NZ	geom_type)r
   Ústart_objectÚ	_geometryr   Ú_metaÚfieldsÚhasattrÚname©r   ÚobjÚfieldr   r   r   r   %   s    

zSerializer.start_objectc                 C   sÖ   d| j d kr|jn
t|| j ƒ| jdœ}| jd ks:d| jkr\d|d kr\|jj |¡|d d< | jrÊ| jj| jkr¶| jj| j	kr t
| jƒ}t| jj|ƒ| j	| jj< | j | j	| jj ¡ t | jj¡|d< nd |d< |S )NZFeature)ÚtypeÚidÚ
propertiesÚpkr$   Zgeometry)r   r%   ÚgetattrÚ_currentr   r   Zvalue_to_stringr   r	   r   r   r   ÚsrsZ	transformÚjsonÚloadsZgeojson)r   r    Údatar(   r   r   r   Úget_dump_object/   s.    ýÿÿ
þ
 ÿzSerializer.get_dump_objectc                    s,   |j | jkr| |¡| _ntƒ  ||¡ d S )N)r   r   Zvalue_from_objectr   r
   Úhandle_fieldr   r   r   r   r-   H   s    zSerializer.handle_field)Ú__name__Ú
__module__Ú__qualname__Ú__doc__r   r   r   r   r,   r-   Ú__classcell__r   r   r   r   r      s   	
r   c                   @   s   e Zd Zdd„ ZdS )ÚDeserializerc                 O   s   t dƒ‚d S )Nz*geojson is a serialization-only serializerr   )r   ÚargsÚkwargsr   r   r   Ú__init__P   s    zDeserializer.__init__N)r.   r/   r0   r6   r   r   r   r   r3   O   s   r3   )
r)   Zdjango.contrib.gis.gdalr   r   Zdjango.core.serializers.baser   Zdjango.core.serializers.jsonr   ZJSONSerializerr3   r   r   r   r   Ú<module>   s
   G