U
    Cvf                     @  s   d dl mZ d dlZd dlZd dlZd dlmZmZm	Z	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mZmZmZ d dlmZ e ZG d	d
 d
e	ZG dd deZG dd de
Zeed< dS )    )annotationsN)BACKEND_ENTRYPOINTSAbstractDataStoreBackendArrayBackendEntrypoint_normalize_path)SerializableLockensure_lock)StoreBackendEntrypoint)indexing)Frozen
FrozenDictclose_on_errormodule_available)Variablec                   @  s$   e Zd Zdd Zdd Zdd ZdS )CfGribArrayWrapperc                 C  s    || _ |j| _|j| _|| _d S N)	datastoreshapeZdtypearray)selfr   r    r   ;/tmp/pip-unpacked-wheel-h316xyqg/xarray/backends/cfgrib_.py__init__   s    zCfGribArrayWrapper.__init__c                 C  s   t || jt jj| jS r   )r   Zexplicit_indexing_adapterr   ZIndexingSupportZBASIC_getitemr   keyr   r   r   __getitem__"   s       zCfGribArrayWrapper.__getitem__c              
   C  s*   | j j | j| W  5 Q R  S Q R X d S r   )r   lockr   r   r   r   r   r   '   s    
zCfGribArrayWrapper._getitemN)__name__
__module____qualname__r   r   r   r   r   r   r   r      s   r   c                   @  sB   e Zd ZdZdddZdd Zdd Zd	d
 Zdd Zdd Z	dS )CfGribDataStorezP
    Implements the ``xr.AbstractDataStore`` read-only API for a GRIB file.
    Nc              
   K  sl   zdd l }W n4 ttfk
r@ } ztd |W 5 d }~X Y nX |d krNt}t|| _|j|f|| _	d S )Nr   zFailed to load cfgrib - most likely there is a problem accessing the ecCodes library. Try `import cfgrib` to get the full error message)
cfgribImportErrorRuntimeErrorwarningswarnECCODES_LOCKr	   r   	open_fileds)r   filenamer   Zbackend_kwargsr#   errr   r   r   r   1   s    
zCfGribDataStore.__init__c                 C  sV   t |jtjr|j}nt| |j}t|}| jj	 }|jj
|d< t|j||j|S )NZoriginal_shape)
isinstancedatanpZndarrayr   r   ZLazilyIndexedArrayr*   encodingcopyr   r   
dimensions
attributes)r   namevarr.   Zwrapped_arrayr0   r   r   r   open_store_variableA   s    
z#CfGribDataStore.open_store_variablec                   s   t  fdd jj D S )Nc                 3  s"   | ]\}}|  ||fV  qd S r   )r6   .0kvr   r   r   	<genexpr>N   s    z0CfGribDataStore.get_variables.<locals>.<genexpr>)r   r*   	variablesitemsr;   r   r;   r   get_variablesM   s    
zCfGribDataStore.get_variablesc                 C  s   t | jjS r   )r   r*   r3   r;   r   r   r   	get_attrsR   s    zCfGribDataStore.get_attrsc                 C  s   t | jjS r   )r   r*   r2   r;   r   r   r   get_dimensionsU   s    zCfGribDataStore.get_dimensionsc                 C  s   |   }ddd | D iS )NZunlimited_dimsc                 S  s   h | ]\}}|d kr|qS r   r   r7   r   r   r   	<setcomp>Z   s      z/CfGribDataStore.get_encoding.<locals>.<setcomp>)rA   r>   )r   Zdimsr   r   r   get_encodingX   s    zCfGribDataStore.get_encoding)N)
r   r    r!   __doc__r   r6   r?   r@   rA   rC   r   r   r   r   r"   ,   s   
r"   c                   @  sD   e Zd ZedZdd Zdddddddddi g dddd	d
dZdS )CfgribfBackendEntrypointr#   c                 C  s4   zt j|\}}W n tk
r*   Y dS X |dkS )NF>   .grib.grb.grib2.grb2)ospathsplitext	TypeError)r   filename_or_obj_extr   r   r   guess_can_open`   s
    z'CfgribfBackendEntrypoint.guess_can_openTNz{path}.{short_hash}.idx)Z	parametertimeZ	geographyZvertical)rR   step)mask_and_scaledecode_timesconcat_charactersdecode_coordsdrop_variables
use_cftimedecode_timedeltar   	indexpathfilter_by_keys	read_keys	encode_cfsqueeze	time_dimsc                C  sX   t |}t||
||||||	d}t }t|  |j||||||||d}W 5 Q R X |S )N)r[   r\   r]   r^   r_   r`   r   )rT   rU   rV   rW   rX   rY   rZ   )r   r"   r
   r   open_dataset)r   rN   rT   rU   rV   rW   rX   rY   rZ   r   r[   r\   r]   r^   r_   r`   storeZstore_entrypointr*   r   r   r   ra   g   s0    


z%CfgribfBackendEntrypoint.open_dataset)r   r    r!   r   	availablerQ   ra   r   r   r   r   rE   ]   s"   rE   r#   )
__future__r   rJ   r&   Znumpyr/   Zxarray.backends.commonr   r   r   r   r   Zxarray.backends.locksr   r	   Zxarray.backends.storer
   Zxarray.corer   Zxarray.core.utilsr   r   r   r   Zxarray.core.variabler   r(   r   r"   rE   r   r   r   r   <module>   s   18