3
gP!                 @   s   d dl mZmZ d dlmZ d dlmZmZ d dlm	Z	m
Z
 d dlmZ d dlmZ d dlmZ d dlmZ d d	lmZmZmZ d d
lmZ d dlmZmZ G dd deZdS )    )byrefc_double)GDALBase)EnvelopeOGREnvelope)GDALExceptionSRSException)Feature)OGRFieldTypes)OGRGeometry)OGRGeomType)dsgeomsrs)SpatialReference)force_bytes	force_strc               @   s   e Zd ZdZdd Zdd Zdd Zdd	 Zd
d Zdd Z	e
dd Ze
dd Ze
d/ddZe
dd Ze
dd Ze
dd Ze
dd Ze
dd Ze
dd  Ze
d!d" Zd#d$ Zd%d& Ze
eeZd'd( Zd0d*d+Zd,d- Zd.S )1LayerzSA class that wraps an OGR Layer, needs to be instantiated from a DataSource object.c             C   s6   |st d|| _|| _tj| j| _| jd| _dS )a7  
        Initialize on an OGR C pointer to the Layer and the `DataSource` object
        that owns this layer.  The `DataSource` object is required so that a
        reference to it is kept with this Layer.  This prevents garbage
        collection of the `DataSource` while this Layer is still active.
        z*Cannot create Layer, invalid pointer givens
   RandomReadN)	r   ptr_dscapiZget_layer_defn_ptr_ldefntest_capability_random_read)selfZ	layer_ptrr    r   [/var/www/tester-filtro-web/env/lib/python3.6/site-packages/django/contrib/gis/gdal/layer.py__init__   s    zLayer.__init__c                sf   t |tr$|dk rtd j|S t |trZ|j j\}}} fddt|||D S tddS )z'Get the Feature at the specified index.r   z/Negative indices are not allowed on OGR Layers.c                s   g | ]} j |qS r   )_make_feature).0fid)r   r   r   
<listcomp>3   s    z%Layer.__getitem__.<locals>.<listcomp>z>Integers and slices may only be used when indexing OGR Layers.N)	
isinstanceint
IndexErrorr   sliceindicesnum_featrange	TypeError)r   indexstartstopZstrider   )r   r   __getitem__'   s    


zLayer.__getitem__c             c   s8   t j| j x&t| jD ]}tt j| j| V  qW dS )z'Iterate over each Feature in the Layer.N)r   Zreset_readingr   r)   r(   r	   Zget_next_feature)r   ir   r   r   __iter__7   s    zLayer.__iter__c             C   s   | j S )z%The length is the number of features.)r(   )r   r   r   r   __len__>   s    zLayer.__len__c             C   s   | j S )zThe string name of the layer.)name)r   r   r   r   __str__B   s    zLayer.__str__c             C   s^   | j r2yttj| j|| S  tk
r.   Y qNX nx| D ]}|j|kr8|S q8W td| dS )a.  
        Helper routine for __getitem__ that constructs a Feature from the given
        Feature ID.  If the OGR Layer does not support random-access reading,
        then each feature of the layer will be incremented through until the
        a Feature is found matching the given feature ID.
        zInvalid feature id: %s.N)r   r	   r   Zget_featurer   r   r!   r%   )r   Zfeat_idfeatr   r   r   r   F   s    

zLayer._make_featurec             C   s"   t  }tj| jt|d t|S )z.Return the extent (an Envelope) of this layer.   )r   r   Z
get_extentr   r   r   )r   envr   r   r   extent]   s    zLayer.extentc             C   s   t j| j}t|| jjddS )z1Return the name of this layer in the Data Source.T)strings_only)r   Zget_fd_namer   r   r   encoding)r   r2   r   r   r   r2   d   s    z
Layer.namer5   c             C   s   t j| j|S )z+Return the number of features in the Layer.)r   Zget_feature_countr   )r   forcer   r   r   r(   j   s    zLayer.num_featc             C   s   t j| jS )z)Return the number of fields in the Layer.)r   Zget_field_countr   )r   r   r   r   
num_fieldso   s    zLayer.num_fieldsc             C   s   t tj| jS )z4Return the geometry type (OGRGeomType) of the Layer.)r   r   Zget_fd_geom_typer   )r   r   r   r   	geom_typet   s    zLayer.geom_typec             C   s4   yt j| j}ttj|S  tk
r.   dS X dS )z0Return the Spatial Reference used in this Layer.N)r   Zget_layer_srsr   r   srs_apiZ	clone_srsr   )r   r   r   r   r   r   y   s
    z	Layer.srsc                s    fddt  jD S )zt
        Return a list of string names corresponding to each of the Fields
        available in this Layer.
        c                s.   g | ]&}t tjtj j| jjd dqS )T)r8   )r   r   Zget_field_nameget_field_defnr   r   r9   )r    r/   )r   r   r   r"      s   z Layer.fields.<locals>.<listcomp>)r)   r;   )r   r   )r   r   fields   s    
zLayer.fieldsc                s    fddt  jD S )z
        Return a list of the types of fields in this Layer.  For example,
        return the list [OFTInteger, OFTReal, OFTString] for an OGR layer that
        has an integer, a floating-point, and string fields.
        c                s$   g | ]}t tjtj j| qS r   )r
   r   Zget_field_typer>   r   )r    r/   )r   r   r   r"      s   z%Layer.field_types.<locals>.<listcomp>)r)   r;   )r   r   )r   r   field_types   s    
zLayer.field_typesc                s    fddt  jD S )z;Return a list of the maximum field widths for the features.c                s    g | ]}t jt j j|qS r   )r   Zget_field_widthr>   r   )r    r/   )r   r   r   r"      s   z&Layer.field_widths.<locals>.<listcomp>)r)   r;   )r   r   )r   r   field_widths   s    
zLayer.field_widthsc                s    fddt  jD S )z-Return the field precisions for the features.c                s    g | ]}t jt j j|qS r   )r   Zget_field_precisionr>   r   )r    r/   )r   r   r   r"      s   z*Layer.field_precisions.<locals>.<listcomp>)r)   r;   )r   r   )r   r   field_precisions   s    
zLayer.field_precisionsc             C   s0   yt tjtj| jS  tk
r*   d S X d S )N)r   geom_apiZ
clone_geomr   Zget_spatial_filterr   r   )r   r   r   r   _get_spatial_filter   s    zLayer._get_spatial_filterc             C   s   t |trtj| j|j njt |ttfrft|dks>tdt	t
|\}}}}tj| j|||| n |d kr~tj| jd  ntdd S )N   z/Spatial filter list/tuple must have 4 elements.zJSpatial filter must be either an OGRGeometry instance, a 4-tuple, or None.)r#   r   r   Zset_spatial_filterr   tuplelistlen
ValueErrormapr   Zset_spatial_filter_rectr*   )r   filterZxminZyminZxmaxZymaxr   r   r   _set_spatial_filter   s    
zLayer._set_spatial_filterc                s(    | j krtd   fdd| D S )zg
        Return a list containing the given field name for every Feature
        in the Layer.
        zinvalid field name: %sc                s   g | ]}|j  qS r   )get)r    r4   )
field_namer   r   r"      s    z$Layer.get_fields.<locals>.<listcomp>)r?   r   )r   rN   r   )rN   r   
get_fields   s    
zLayer.get_fieldsFc                s4   |r"ddl m   fdd| D S dd | D S dS )zb
        Return a list containing the OGRGeometry for every Feature in
        the Layer.
        r   )GEOSGeometryc                s   g | ]} |j jqS r   )r   Zwkb)r    r4   )rP   r   r   r"      s    z#Layer.get_geoms.<locals>.<listcomp>c             S   s   g | ]
}|j qS r   )r   )r    r4   r   r   r   r"      s    N)Zdjango.contrib.gis.geosrP   )r   Zgeosr   )rP   r   	get_geoms   s    zLayer.get_geomsc             C   s   t tj| jt|S )ah  
        Return a bool indicating whether the this Layer supports the given
        capability (a string).  Valid capability strings include:
          'RandomRead', 'SequentialWrite', 'RandomWrite', 'FastSpatialFilter',
          'FastFeatureCount', 'FastGetExtent', 'CreateField', 'Transactions',
          'DeleteFeature', and 'FastSetNextByIndex'.
        )boolr   r   r   r   )r   Z
capabilityr   r   r   r      s    zLayer.test_capabilityN)r5   )F)__name__
__module____qualname____doc__r   r.   r0   r1   r3   r   propertyr7   r2   r(   r;   r<   r   r?   r@   rA   rB   rD   rL   Zspatial_filterrO   rQ   r   r   r   r   r   r      s0   	

	
r   N) ctypesr   r   Zdjango.contrib.gis.gdal.baser   Z django.contrib.gis.gdal.enveloper   r   Zdjango.contrib.gis.gdal.errorr   r   Zdjango.contrib.gis.gdal.featurer	   Zdjango.contrib.gis.gdal.fieldr
   Z"django.contrib.gis.gdal.geometriesr   Z django.contrib.gis.gdal.geomtyper   Z"django.contrib.gis.gdal.prototypesr   r   r   rC   r   r=   Zdjango.contrib.gis.gdal.srsr   Zdjango.utils.encodingr   r   r   r   r   r   r   <module>   s   