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o �hy" � @ s� d dl mZmZ d dlmZ d dlmZmZ d dlm Z m Z d dl m Z d dl mZ d dlmZ d dlmZ d d lmZ d d lmZ d d lmZ d d lmZ d d l m Z m Z G dd� de�Z dS )� )�byref�c_double)�GDALBase)�Envelope� OGREnvelope)� GDALException� SRSException)�Feature)� OGRFieldTypes)� OGRGeometry)� OGRGeomType)�ds��geom)�srs)�SpatialReference)� force_bytes� force_strc @ s� e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zd d � Z e dd� �Z e dd� �Z e d/dd��Z e dd� �Ze dd� �Ze dd� �Ze dd � �Ze d d � �Ze d d � �Ze d!d"� �Zd#d$� Zd%d&� Ze ee�Zd'd(� Zd0d*d+�Zd,d-� Zd.S )1�Layerza A class that wraps an OGR Layer, needs to be instantiated from a DataSource object. c C s6 |st d��|| _|| _t�| j�| _| �d�| _dS )a7 Initialize on an OGR C pointer to the Layer and the `DataSource` object that owns this layer. The `DataSource` object is required so that a reference to it is kept with this Layer. This prevents garbage collection of the `DataSource` while this Layer is still active. z*Cannot create Layer, invalid pointer givens RandomReadN) r �ptr�_ds�capi�get_layer_defn�_ptr�_ldefn�test_capability� _random_read)�self� layer_ptrr � r �P/usr/local/CyberCP/lib/python3.10/site-packages/django/contrib/gis/gdal/layer.py�__init__ s zLayer.__init__c sb t |t�r|dk r td��� �|�S t |t�r-|�� j�\}}}� fdd�t|||�D �S td��)z'Get the Feature at the specified index.r z/Negative indices are not allowed on OGR Layers.c s g | ]}� � |��qS r )� _make_feature)�.0�fid�r r r � <listcomp>6 � z%Layer.__getitem__.<locals>.<listcomp>z>Integers and slices may only be used when indexing OGR Layers.) � isinstance�int� IndexErrorr" �slice�indices�num_feat�range� TypeError)r �index�start�stop�strider r% r � __getitem__* s �zLayer.__getitem__c c s6 � t �| j� t| j�D ] }tt �| j�| �V q dS )z'Iterate over each Feature in the Layer.N)r � reset_readingr r. r- r �get_next_feature)r �ir r r �__iter__< s � �zLayer.__iter__c C � | j S )z%The length is the number of features.)r- r% r r r �__len__C � z Layer.__len__c C r9 )z The string name of the layer.)�namer% r r r �__str__G r; z Layer.__str__c C sX | j rz tt�| j|�| �W S ty Y nw | D ] }|j|kr%| S qtd| ��)a. Helper routine for __getitem__ that constructs a Feature from the given Feature ID. If the OGR Layer does not support random-access reading, then each feature of the layer will be incremented through until the a Feature is found matching the given feature ID. zInvalid feature id: %s.)r r r � get_featurer r r$ r* )r �feat_id�featr r r r" K s � � zLayer._make_featurec C s" t � }t�| jt|�d� t|�S )z.Return the extent (an Envelope) of this layer.� )r r � get_extentr r r )r �envr r r �extentb s z Layer.extentc C s t �| j�}t|| jjdd�S )z1Return the name of this layer in the Data Source.T�� strings_only)r � get_fd_namer r r �encoding)r r< r r r r< i s z Layer.namerA c C s t �| j|�S )z+Return the number of features in the Layer.)r �get_feature_countr )r �forcer r r r- o s zLayer.num_featc C s t �| j�S )z)Return the number of fields in the Layer.)r �get_field_countr r% r r r � num_fieldst s zLayer.num_fieldsc C s t t�| j��S )z4Return the geometry type (OGRGeomType) of the Layer.)r r �get_fd_geom_typer r% r r r � geom_typey s zLayer.geom_typec C s2 zt �| j�}tt�|��W S ty Y dS w )z0Return the Spatial Reference used in this Layer.N)r � get_layer_srsr r �srs_api� clone_srsr )r r r r r r ~ s �z Layer.srsc � � fdd�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�t�� j|��� jjd d��qS )TrE )r r �get_field_name�get_field_defnr r rH �r# r7 r% r r r& � s ���z Layer.fields.<locals>.<listcomp>�r. rL r% r r% r �fields� s �z Layer.fieldsc rR )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�t�� j|�� �qS r )r r �get_field_typerT r rU r% r r r& � s ��z%Layer.field_types.<locals>.<listcomp>rV r% r r% r � field_types� s �zLayer.field_typesc rR )z;Return a list of the maximum field widths for the features.c � g | ] }t �t �� j|���qS r )r �get_field_widthrT r rU r% r r r& � � ��z&Layer.field_widths.<locals>.<listcomp>rV r% r r% r � field_widths� � �zLayer.field_widthsc rR )z-Return the field precisions for the features.c rZ r )r �get_field_precisionrT r rU r% r r r& � r\ z*Layer.field_precisions.<locals>.<listcomp>rV r% r r% r �field_precisions� r^ zLayer.field_precisionsc C s. z t t�t�| j���W S ty Y d S w )N)r �geom_api� clone_geomr �get_spatial_filterr r r% r r r �_get_spatial_filter� s �zLayer._get_spatial_filterc C s� t |t�rt�| j|j� d S t |ttf�r5t|�dks td��t t |�\}}}}t� | j||||� d S |d u rBt�| jd � d S t d��)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 �set_spatial_filterr �tuple�list�len� ValueError�mapr �set_spatial_filter_rectr/ )r �filter�xmin�ymin�xmax�ymaxr r r �_set_spatial_filter� s �zLayer._set_spatial_filterc s( � | j vr td� ��� fdd�| D �S )zg Return a list containing the given field name for every Feature in the Layer. zinvalid field name: %sc s g | ]}|� � ��qS r )�get�r# r@ �� field_namer r r& � r' z$Layer.get_fields.<locals>.<listcomp>)rW r )r rv r ru r � get_fields� s zLayer.get_fieldsFc s0 |rddl m� � fdd�| D �S dd� | D �S )zb Return a list containing the OGRGeometry for every Feature in the Layer. r �� GEOSGeometryc s g | ]}� |j j��qS r )r �wkbrt rx r r r& � s z#Layer.get_geoms.<locals>.<listcomp>c S s g | ]}|j �qS r r rt r r r r& � s )�django.contrib.gis.geosry )r �geosr rx r � get_geoms� s zLayer.get_geomsc C s t t�| jt|���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 � capabilityr r r r � s zLayer.test_capabilityN)rA )F)�__name__� __module__� __qualname__�__doc__r! r4 r8 r: r= r" �propertyrD r< r- rL rN r rW rY r] r` rd rr �spatial_filterrw r} r r r r r r sD r N) �ctypesr r � django.contrib.gis.gdal.baser � django.contrib.gis.gdal.enveloper r � django.contrib.gis.gdal.errorr r � django.contrib.gis.gdal.featurer � django.contrib.gis.gdal.fieldr �"django.contrib.gis.gdal.geometriesr � django.contrib.gis.gdal.geomtyper �"django.contrib.gis.gdal.prototypesr r r ra r rP �django.contrib.gis.gdal.srsr �django.utils.encodingr r r r r r r �<module> s
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