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If you reassign their bases, their relations with other specifications are adjusted accordingly. r c C s i | _ t�� | _t|�| _d S �N)r6 �weakref�WeakKeyDictionary� dependents�tuple� __bases__)r" �basesr r r r# � s zSpecification.__init__c C s | j �|d�d | j |< d S �Nr r )rP r, )r" � dependentr r r � subscribe� s zSpecification.subscribec C s@ | j �|d�d }|s | j |= n |dkr4|| j |< nt|��d S rT )rP r, �KeyError)r" rU �nr r r � unsubscribe� s zSpecification.unsubscribec C sB | j D ]}|�| � q|| jd< |D ]}|�| � q$| �| � d S )NrR )rR rY �__dict__rV �changed)r" rS �br r r Z __setBases� s zSpecification.__setBasesc C s | j �dd�S )NrR r )rZ r, r% r r r �<lambda>� � zSpecification.<lambda>c C s� z| ` W n ty Y n0 | j}|�� t| �}zt|vrF|�t� W n tyZ Y n0 t|�| _ tdd� |D ��| _ |D ] }d||< q~t| j � � �D ]}|� |� q�dS )z4We, or something we depend on, have changed c S s g | ]}t |t�r|�qS r )� isinstance�InterfaceClass)�.0�ancestorr r r � <listcomp>� s �z)Specification.changed.<locals>.<listcomp>r N)�_v_attrs�AttributeErrorr6 �clearr � Interfacer � NameErrorrQ Z__sro__�__iro__rP r/ r[ )r" Zoriginally_changedZimpliedZ ancestorsrb rU r r r r[ � s$ zSpecification.changedc c s8 i }| j D ](}|�� D ]}||vrd||< |V qq dS )�DReturn an iterator for the interfaces in the specification. r N)rR � interfaces)r" �seen�baser< r r r rk � s zSpecification.interfacesTc C s || j v o| p| |kS )z�Does the specification extend the given interface? Test whether an interface in the specification extends the given interface r; )r" r< �strictr r r �extends s �zSpecification.extendsNc C s t �| |�S rM )rN �ref)r" �callbackr r r rN s zSpecification.weakrefc C sx z | j }W n ty& i }| _ Y n0 |�|�}|du rd| jD ]"}|�|�}|dur@|||< qdq@|du rp|S |S dS )z+Query for an attribute description N)rd re r, ri �direct)r" �namer- �attrs�attrZifacer r r r, s zSpecification.get)r )T)N)N)r r2 r3 r r? r= r5 r# rV rY Z_Specification__setBases�propertyrR r[ rk ro rN r, r r r r rL � s �! rL c @ s� e Zd ZdZd3dd�Zdd� Zdd � Zd d � Zd4d d�Zdd� Z d5dd�Z dd� Z e Z dd� Z dd� Zd6dd�Zd7dd �Zd d � Zd d � Zd!d"� Zd#d$� Zd%d&� Zd'd(� Zd)d*� Zd+d,� Zd-d.� Zd/d0� Zd1d2� ZdS )8r` z0Prototype (scarecrow) Interfaces Implementation.r Nc C s� |d u r i }|d u r\|� d�}t|t�r0|d= n,zt�d�jd }W n ttfyZ Y n0 || _|� d�}|d ur�t|t �s�|d u r�|}|d= |d u r�d}t � | ||� |� t d �}|d ur�|�� D ]\}} | �|| � q�|D ]} t| t�s�td��q�t� | |� t|�� �D ]~\}} |dv �r,||= �qt| t ��rN| | _| j�s�|| _n>t| t��rnt| | |d�||< n | tu �r�||= n td | ���q|| _d | j| jf | _d S ) Nr2 r r r r zExpected base interfaces)Z __locals__r3 �__annotations__)rs zConcrete attribute, �%s.%s) r, r_ �strr r � f_globalsre rW r2 � Attributer r# �popr �itemsr1 r` rE rL �listr< r r � fromFunctionr �InvalidInterface�_InterfaceClass__attrsZ__identifier__) r" rs rS rt r r2 �dZ tagged_datar �valrm ru r r r r# 4 sV zInterfaceClass.__init__c c s | V dS )rj Nr r% r r r rk x s zInterfaceClass.interfacesc C s | j S rM )rR r% r r r �getBases} s zInterfaceClass.getBasesc C s | |kp|� | �S )zSame interface or extends?)ro )r" �otherr r r �isEqualOrExtendedBy� s z"InterfaceClass.isEqualOrExtendedByFc C sB |s| j �� S | j �� }| jD ]}|�t�|�|��� q |�� S )z4Return the attribute names defined by the interface.)r� r/ �copyrR �update�dict�fromkeys�names�r" �all�rrm r r r r� � s zInterfaceClass.namesc C s t | jdd��S )NT)r� )�iterr� r% r r r �__iter__� s zInterfaceClass.__iter__c C sP |s| j �� S i }| jddd� D ]}|�t|�|��� q"|�| j � |�� S )z=Return attribute names and descriptions defined by interface.N���)r� r} rR r� r� �namesAndDescriptionsr� r r r r� � s z#InterfaceClass.namesAndDescriptionsc C s" | � |�}|dur|S t|��dS )z4Return the attribute description for the given name.N)r, rW )r" rs r� r r r �getDescriptionFor� s z InterfaceClass.getDescriptionForc C s | � |�d uS rM �r, �r" rs r r r � __contains__� s zInterfaceClass.__contains__c C s | j �|�S rM )r� r, r� r r r rr � s zInterfaceClass.directc C s | � ||�S rM r� )r" rs r- r r r �queryDescriptionFor� s z"InterfaceClass.queryDescriptionForc C s� | � dg �D ]L}z ||� W q tyV } z"|du r8� n |�|� W Y d}~q d}~0 0 q | jD ]2}z|�||� W q` ty� |du r�� Y q`0 q`|r�t|��dS )z&validate object to defined invariants.r N)r. r r rR �validateInvariants)r" rF �errorsr �erm r r r r� � s " z!InterfaceClass.validateInvariantsc C sV z| j W S tyP | j}| j}|r2d||f }d| jj|f }|| _ | Y S 0 d S )Nrx z<%s %s>)Z_v_reprre r r2 � __class__)r" rs �mr� r r r �__repr__� s zInterfaceClass.__repr__c C s6 z || �W S t y0 t�� d jd ur,� Y n0 d S )N� )rE r �exc_info�tb_next)r" rG r r r rB � s z InterfaceClass._call_conformc C s | j S rM r$ r% r r r � __reduce__� s zInterfaceClass.__reduce__c C sL |du r dS t | dd�t | dd�f}t |dd�t |dd�f}||k||k S )a� Make interfaces sortable TODO: It would ne nice if: More specific interfaces should sort before less specific ones. 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Nr� r r r2 )rA )r" r� Zn1Zn2r r r Z__cmp� s zInterfaceClass.__cmpc C s4 | j }d|vsd|vr$t�d� dS t| j| jf�S )Nr2 r z-Hashing uninitialized InterfaceClass instancer )rZ �warnings�warn�hashr r2 )r" r� r r r �__hash__ s zInterfaceClass.__hash__c C s | � |�}|dkS �Nr ��_InterfaceClass__cmp�r" r� �cr r r �__eq__ s zInterfaceClass.__eq__c C s | � |�}|dkS r� r� r� r r r �__ne__ s zInterfaceClass.__ne__c C s | � |�}|dk S r� r� r� r r r �__lt__ s zInterfaceClass.__lt__c C s | � |�}|dkS r� r� r� r r r �__le__ s zInterfaceClass.__le__c C s | � |�}|dkS r� r� r� r r r �__gt__ s zInterfaceClass.__gt__c C s | � |�}|dkS r� r� r� r r r �__ge__" s zInterfaceClass.__ge__)r NNN)F)F)N)N) r r2 r3 r r# rk r� r� r� r� r� r� � __getitem__r� rr r� r� r� rB r� r� r� r� r� r� r� r� r� r r r r r` , s6 � D r` rg zzope.interface)r2 c @ s e Zd ZdZdZdS )r{ zAttribute descriptions N)r r2 r3 r r< r r r r r{ ) s r{ c @ s` e Zd ZdZd ZZd Z ZZdd� Z dd� Z dd � Z e e e e �Z d d � Zd d � Zdd� ZdS )�Methodz�Method interfaces The idea here is that you have objects that describe methods. This provides an opportunity for rich meta-data. r Nc C s | j d u ri S | j S rM �� _optionalr% r r r � _get_optionalC s zMethod._get_optionalc C s || _ d S rM r� )r" �optr r r � _set_optionalG s zMethod._set_optionalc C s d | _ d S rM r� r% r r r � _del_optionalI s zMethod._del_optionalc O s t | j| j��d S rM )�BrokenImplementationr< r )r" �args�kwr r r r> M s zMethod.__call__c C s | j | j| j| j| jd�S )N�� positional�required�optional�varargs�kwargsr� r% r r r �getSignatureInfoP s �zMethod.getSignatureInfoc C s� g }| j D ]:}|�|� || j�� v r |d dt| j| � 7 < q | jr\|�d| j � | jrr|�d| j � dd�|� S )Nr� �=�*z**z(%s)z, )r� r r� r/ �reprr� r� �join)r" Zsig�vr r r �getSignatureStringX s zMethod.getSignatureString)r r2 r3 r r� r� r� r� r� r� r� r� rv r� r> r� r� r r r r r� 5 s r� c C s |p| j }t|| j�}t| dd �p$d}| j}|j| }|j|d � }i } |t|� } | dk rn|| d � }d} | �t t || d � |��� |d |� |_ |d | � |_ | |_ |} |jt@ r�|| |_| d } nd |_|jt@ r�|| |_nd |_||_| j�� D ]\} } |�| | � �q |S )N� __defaults__r r r )r r� r rA �__code__� co_argcount� co_varnames�lenr� r� �zipr� r� r� �co_flags� CO_VARARGSr� �CO_VARKEYWORDSr� r< rZ r} r1 )�funcr< �imlevelrs �method�defaults�codeZnar� r� �nrZargnor r r r r r e s6 r c C s& t | t�r| j}n| }t||d|d�S )Nr )r� rs )r_ r �__func__r )�methr< rs r� r r r � fromMethod� s r� c C sh ddl m} ddlm} | t|� ddlm} | t|� ddlm} | t|� ddlm } | t |� d S )Nr )�classImplements)� IAttribute)�IMethod)� IInterface)�ISpecification) � declarationsr� rk r� r{ r� r� r� r` r� rL )r� r� r� r� r� r r r �_wire� s r� )r9 )r5 )r� )r� )Nr N)NN)*r Z __future__r r r �typesr r r� rN � exceptionsr r r� r� r �objectr r r r r4 r? 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