OwlCyberSecurity - MANAGER
Edit File: layer.cpython-39.pyc
a ���ey" � @ 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$� Zd%d&� Ze ee�Zd'd(� Zd0d*d+�Zd,d-� Zd.S )1�Layerza A class that wraps an OGR Layer, needs to be instantiated from a DataSource object. c C s6 |s t d��|| _|| _t�| j�| _| �d�| _dS )a7 Initialize on an OGR C pointer to the Layer and the `DataSource` object that owns this layer. The `DataSource` object is required so that a reference to it is kept with this Layer. This prevents garbage collection of the `DataSource` while this Layer is still active. z*Cannot create Layer, invalid pointer givens RandomReadN) r �ptr�_ds�capiZget_layer_defn�_ptr�_ldefn�test_capability� _random_read)�selfZ layer_ptrr � r �^/home/gouroczh/virtualenv/pat/3.9/lib/python3.9/site-packages/django/contrib/gis/gdal/layer.py�__init__ s zLayer.__init__c sf t |t�r$|dk rtd��� �|�S t |t�rZ|�� j�\}}}� fdd�t|||�D �S td��dS )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.N) � isinstance�int� IndexErrorr �slice�indices�num_feat�range� TypeError)r �index�start�stopZstrider r# r � __getitem__* s �zLayer.__getitem__c c s4 t �| j� t| j�D ]}tt �| j�| �V qdS )z'Iterate over each Feature in the Layer.N)r Z reset_readingr r, r+ r Zget_next_feature)r �ir r r �__iter__< s zLayer.__iter__c C s | j S )z%The length is the number of features.)r+ r# r r r �__len__C s z Layer.__len__c C s | j S )z The string name of the layer.)�namer# r r r �__str__G s z Layer.__str__c C s^ | j r2ztt�| j|�| �W S ty. Y qN0 n | D ]}|j|kr6| S q6td| ��dS )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.N)r r r Z get_featurer r r" r( )r Zfeat_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 Z 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�Z strings_only)r Z get_fd_namer r r �encoding)r r5 r r r r5 i s z Layer.namer8 c C s t �| j|�S )z+Return the number of features in the Layer.)r Zget_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 Zget_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 Zget_fd_geom_typer r# r r r � geom_typey s zLayer.geom_typec C s6 z t �| j�}tt�|��W S ty0 Y dS 0 dS )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 ~ s z Layer.srsc s � 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 )Tr; )r r Zget_field_name�get_field_defnr r r< �r! r2 r# r r r$ � s ��z Layer.fields.<locals>.<listcomp>�r, r> r# r r# r �fields� s �z Layer.fieldsc s � fdd�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�t�� j|�� �qS r )r r Zget_field_typerA r rB r# r r r$ � s �z%Layer.field_types.<locals>.<listcomp>rC r# r r# r � field_types� s �zLayer.field_typesc s � fdd�t � j�D �S )z;Return a list of the maximum field widths for the features.c s g | ]}t �t �� j|���qS r )r Zget_field_widthrA r rB r# r r r$ � s �z&Layer.field_widths.<locals>.<listcomp>rC r# r r# r � field_widths� s �zLayer.field_widthsc s � fdd�t � j�D �S )z-Return the field precisions for the features.c s g | ]}t �t �� j|���qS r )r Zget_field_precisionrA r rB r# r r r$ � s �z*Layer.field_precisions.<locals>.<listcomp>rC r# r r# r �field_precisions� s �zLayer.field_precisionsc C s2 zt t�t�| j���W S ty, Y d S 0 d S )N)r �geom_apiZ clone_geomr Zget_spatial_filterr r r# r r r �_get_spatial_filter� s zLayer._get_spatial_filterc C s� t |t�r t�| j|j� njt |ttf�rft|�dks>td��t t |�\}}}}t� | j||||� n |d u r~t�| jd � nt 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 Zset_spatial_filterr �tuple�list�len� ValueError�mapr Zset_spatial_filter_rectr- )r �filterZxminZyminZxmaxZymaxr r r �_set_spatial_filter� s �zLayer._set_spatial_filterc s( � | j vrtd� ��� 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! r7 �� field_namer r r$ � r% z$Layer.get_fields.<locals>.<listcomp>)rD r )r rU r rT r � get_fields� s zLayer.get_fieldsFc s4 |r"ddl m� � fdd�| D �S dd� | D �S dS )zb Return a list containing the OGRGeometry for every Feature in the Layer. r �� GEOSGeometryc s g | ]}� |j j��qS r )r ZwkbrS rW r r r$ � r% z#Layer.get_geoms.<locals>.<listcomp>c S s g | ] }|j �qS r r rS r r r r$ � r% N)Zdjango.contrib.gis.geosrX )r Zgeosr rW 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 Z capabilityr r r r � s zLayer.test_capabilityN)r8 )F)�__name__� __module__� __qualname__�__doc__r r1 r3 r4 r6 r �propertyr: r5 r+ r> r? r rD rE rF rG rI rQ Zspatial_filterrV rY r r r r r r sB 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 rH r r@ Zdjango.contrib.gis.gdal.srsr Zdjango.utils.encodingr r r r r r r �<module> s