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Editing: styles.cpython-38.pyc
U W[�4 � @ s d Z ddlmZmZ ddlZddlZz ddlZW n ek rL ddlZY nX ddl Z ddl Z ddl m Z m Z ddlmZ ddlmZ i Zz ddlZW n ek r� dZY nX edks�ejejkr�ejZnG dd� dejej�Zd d � Zd d � Zd d� Ze�ejee� dd� Zdd� Ze�ejee� dd� Z dd� Z e�ej e e � dd� Z dd� Z dd � Z!d d � Z"zdd l#m$Z$m%Z%m&Z' W n" ek �r� dd l(m&Z' Y n X e�e%e e � e�e$e!e"� G d!d"� d"�Z)i a*i a+d#d$� Z,d%d&� Z-d'd(� Z.G d)d*� d*�Z/dS )+z( Different styles of persisted objects. � )�division�absolute_importN)�_PY3�_PYPY)�log)�reflectc @ s e Zd ZdZdS )�_UniversalPicklingErrorzz A PicklingError catchable by both L{cPickle.PicklingError} and L{pickle.PicklingError} handlers. N)�__name__� __module__� __qualname__�__doc__� r r �:/usr/lib/python3/dist-packages/twisted/persisted/styles.pyr & s r c C s4 t rt| j| j| jjffS t| jj| j| jffS dS )z3support function for copy_reg to pickle method refsN)r �unpickleMethodr �__self__� __class__�im_func�im_self�im_class)�methodr r r � pickleMethod1 s ��r c C s t | |�}tr|S |jS )a� Retrieve the function object implementing a method name given the class it's on and a method name. @param classObject: A class to retrieve the method's function from. @type classObject: L{type} or L{types.ClassType} @param methodName: The name of the method whose function to retrieve. @type methodName: native L{str} @return: the function object corresponding to the given method name. @rtype: L{types.FunctionType} )�getattrr r )Z classObjectZ methodNameZ methodObjectr r r �_methodFunction> s r c C s� |dkrt || �S zt|| �}W nN tk rn t�d| d|� |dk sPtd��|j|kr\� t| ||j� Y S X trzd}n t |g�}t j ||f|�� }|S dS )ai Support function for copy_reg to unpickle method refs. @param im_name: The name of the method. @type im_name: native L{str} @param im_self: The instance that the method was present on. @type im_self: L{object} @param im_class: The class where the method was declared. @type im_class: L{types.ClassType} or L{type} or L{None} NZMethodz not on classz'No recourse: no instance to guess from.r ) r r �AttributeErrorr �msg�AssertionErrorr r r �tuple�types� MethodType)Zim_namer r ZmethodFunctionZ maybeClassZboundr r r r S s r c C s4 | j dkrtd�| ���ttd�| j| jg�g�fS )a� Reduce, in the sense of L{pickle}'s C{object.__reduce__} special method, a function object into its constituent parts. @param f: The function to reduce. @type f: L{types.FunctionType} @return: a 2-tuple of a reference to L{_unpickleFunction} and a tuple of its arguments, a 1-tuple of the function's fully qualified name. @rtype: 2-tuple of C{callable, native string} z<lambda>z!Cannot pickle lambda function: {}�.)r r �format�_unpickleFunctionr �joinr r )�fr r r �_pickleFunctiony s ��r$ c C s ddl m} || �S )a� Convert a function name into a function by importing it. This is a synonym for L{twisted.python.reflect.namedAny}, but imported locally to avoid circular imports, and also to provide a persistent name that can be stored (and deprecated) independently of C{namedAny}. @param fullyQualifiedName: The fully qualified name of a function. @type fullyQualifiedName: native C{str} @return: A function object imported from the given location. @rtype: L{types.FunctionType} r )�namedAny)Ztwisted.python.reflectr% )ZfullyQualifiedNamer% r r r r! � s r! c C s t | jffS )z3support function for copy_reg to pickle module refs)�unpickleModuler )�moduler r r � pickleModule� s r( c C s6 | t kr(t�d| � t | } t�| � t| i i d�S )z5support function for copy_reg to unpickle module refszModule has moved: %s�x)� oldModulesr r � __import__)�namer r r r& � s r& c C s t | �� | �� ffS )z� Reduce the given cStringO. This is only called on Python 2, because the cStringIO module only exists on Python 2. @param stringo: The string output to pickle. @type stringo: L{cStringIO.OutputType} )�unpickleStringO�getvalue�tell)Zstringor r r � pickleStringO� s r0 c C s t � }|�| � |�|� |S )a� Convert the output of L{pickleStringO} into an appropriate type for the current python version. This may be called on Python 3 and will convert a cStringIO into an L{io.StringIO}. @param val: The content of the file. @type val: L{bytes} @param sek: The seek position of the file. @type sek: L{int} @return: a file-like object which you can write bytes to. @rtype: L{cStringIO.OutputType} on Python 2, L{io.StringIO} on Python 3. )� _cStringIO�write�seek��valZsekr) r r r r- � s r- c C s t | �� | �� ffS )aQ Reduce the given cStringI. This is only called on Python 2, because the cStringIO module only exists on Python 2. @param stringi: The string input to pickle. @type stringi: L{cStringIO.InputType} @return: a 2-tuple of (C{unpickleStringI}, (bytes, pointer)) @rtype: 2-tuple of (function, (bytes, int)) )�unpickleStringIr. r/ )Zstringir r r � pickleStringI� s r7 c C s t | �}|�|� |S )a� Convert the output of L{pickleStringI} into an appropriate type for the current Python version. This may be called on Python 3 and will convert a cStringIO into an L{io.StringIO}. @param val: The content of the file. @type val: L{bytes} @param sek: The seek position of the file. @type sek: L{int} @return: a file-like object which you can read bytes from. @rtype: L{cStringIO.OutputType} on Python 2, L{io.StringIO} on Python 3. )r1 r3 r4 r r r r6 � s r6 )� InputType� OutputType�StringIO)r: c @ s( e Zd ZdZdd� Zdd� Zdd� ZdS ) � Ephemeralzh This type of object is never persisted; if possible, even references to it are eliminated. c C s t dfS )zu Serialize any subclass of L{Ephemeral} in a way which replaces it with L{Ephemeral} itself. r )r; )�selfr r r � __reduce__ s zEphemeral.__reduce__c C sJ t �d| � tsFdd l}t|dd �rF|�| �D ]}t �d|f � q0d S )Nz!WARNING: serializing ephemeral %sr � get_referrersz referred to by %s)r r r �gcr r> )r< r? �rr r r � __getstate__ s zEphemeral.__getstate__c C s t �d| j � t| _d S )Nz#WARNING: unserializing ephemeral %s)r r r r; �r< �stater r r � __setstate__" s zEphemeral.__setstate__N)r r r r r= rA rD r r r r r; s r; c C s& t t�� �D ] } t| � q i ai ad S �N)�list�versionedsToUpgrade�values�requireUpgrade�upgraded)Z versionedr r r � doUpgrade* s rK c C s0 t | �}|tkr,|tkr,dt|< | �� | S dS )zDRequire that a Versioned instance be upgraded completely first. � N)�idrG rJ �versionUpgrade)�objZobjIDr r r rI 1 s rI c C s@ | t g}t�| �D ] }||krt|t �r|�|� q|dd� S )z� Get all of the parent classes of C{c}, not including C{c} itself, which are strict subclasses of L{Versioned}. @param c: a class @returns: list of classes � N)� Versioned�inspectZgetmro� issubclass�append)�c�l�br r r �_aybabtu: s rX c @ s2 e Zd ZdZdZdZdd� Zd dd�Zd d � ZdS ) rQ a� This type of object is persisted with versioning information. I have a single class attribute, the int persistenceVersion. After I am unserialized (and styles.doUpgrade() is called), self.upgradeToVersionX() will be called for each version upgrade I must undergo. For example, if I serialize an instance of a Foo(Versioned) at version 4 and then unserialize it when the code is at version 9, the calls:: self.upgradeToVersion5() self.upgradeToVersion6() self.upgradeToVersion7() self.upgradeToVersion8() self.upgradeToVersion9() will be made. If any of these methods are undefined, a warning message will be printed. r r c C s | t t| �< || _d S rE )rG rM �__dict__rB r r r rD b s zVersioned.__setstate__Nc C s~ t � |p | j�}t| j�}|�� |�| j� |D ]F}d|jkrZ|jD ]}||krF||= qFd|jkr2|j|dt� |� < q2|S )zAGet state, adding a version number to it on its way out. �persistenceForgets�persistenceVersion�%s.persistenceVersion) �copyrY rX r �reverserT rZ r[ r �qual)r< �dictZdct�bases�baseZslotr r r rA f s zVersioned.__getstate__c C sV t | j�}|�� |�| j� d| jkr�| jd }| jd= d}d}|D ]$}d|jkrVqF|j|krF|}|j}qF|r�|| jdt�|� < |D ]�}t|j kr�d|jkr�q�|j}dt�|� }| j� |�p�d}|r�| j|= ||ks�t d��||k r�|d }|j� d| d�} | �r<t � dt�|�t�| j�t| �|f � | | � q�t � d ||f � q�q�dS ) z)(internal) Do a version upgrade. r[ r Nr\ z"Sorry, can't go backwards in time.rL zupgradeToVersion%sz'Upgrading %s (of %s @ %s) to version %sz(Warning: cannot upgrade %s to version %s)rX r r^ rT rY r[ r r_ rQ � __bases__�getr r r rM ) r< ra ZpverZhighestVersionZ highestBaserb Z currentVersZpverNameZ persistVersr r r r rN v sD �( zVersioned.versionUpgrade)N) r r r r r[ rZ rD rA rN r r r r rQ K s rQ )0r Z __future__r r r �pickleZcopy_reg� ImportError�copyregr] rR Ztwisted.python.compatr r Ztwisted.pythonr r r* ZcPickleZ PicklingErrorr r r r r r$ r! � FunctionTyper( r& � ModuleTyper0 r- r7 r6 � cStringIOr8 r9 r: r1 �ior; rG rJ rK rI rX rQ r r r r �<module> sh � $ �
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