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Edit File: annotation.pyc
� 1��fc @ s d Z d d l m Z d d l m Z d d l m Z d d l m Z d d l m Z e j � Z d e f d � � YZ d e f d � � YZ d e f d � � YZ d e f d � � YZ i Z d � Z d e d � Z d d � Z d � Z d � Z d � Z d S( s� The :class:`.Annotated` class and related routines; creates hash-equivalent copies of SQL constructs which contain context-specific markers and associations. i ( t operators( t HasCacheKey( t anon_map( t InternalTraversali ( t utilt SupportsAnnotationsc B s) e Z e Z e j d � � Z d � Z RS( c C s t � } | j | � S( N( R t _gen_annotations_cache_key( t selft anon_map_( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyt _annotations_cache_key s c sI d t � f d � g t | j � D] } | | j | f ^ q" D� � f S( Nt _annotationsc 3 sB | ]8 \ } } | t | t � r3 | j � g � n | f Vq d S( N( t isinstanceR t _gen_cache_key( t .0t keyt value( R ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pys <genexpr>$ s ( t tuplet sortedR ( R R R ( ( R sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyR s ( t __name__t __module__t EMPTY_ANNOTATIONSR R t memoized_propertyR R ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyR s t SupportsCloneAnnotationsc B s; e Z d e j f g Z d � Z d � Z d e d � Z RS( R c C sK | j � } | j j | � | _ | j j d d � | j j d d � | S( sg return a copy of this ClauseElement with annotations updated by the given dictionary. R t _generate_cache_keyN( t _cloneR t uniont __dict__t popt None( R t valuest new( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyt _annotate8 s c C sH | j � } t j | � | _ | j j d d � | j j d d � | S( sh return a copy of this ClauseElement with annotations replaced by the given dictionary. R R N( R R t immutabledictR R R R ( R R R ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyt _with_annotationsC s c C sI | s | j rA | j � } t j � | _ | j j d d � | S| Sd S( s� return a copy of this :class:`_expression.ClauseElement` with annotations removed. :param values: optional tuple of individual values to remove. R N( R R R R R R R ( R R t cloneR ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyt _deannotateN s N( R R R t dp_annotations_keyt% _clone_annotations_traverse_internalsR R! R t FalseR# ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyR 2 s t SupportsWrappingAnnotationsc B s) e Z d � Z d � Z d e d � Z RS( c C s t | | � S( sg return a copy of this ClauseElement with annotations updated by the given dictionary. ( t Annotated( R R ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyR c s c C s t | | � S( sh return a copy of this ClauseElement with annotations replaced by the given dictionary. ( R( ( R R ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyR! j s c C s | r | j � } | S| Sd S( s� return a copy of this :class:`_expression.ClauseElement` with annotations removed. :param values: optional tuple of individual values to remove. N( R ( R R R" t s( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyR# q s N( R R R R! R R& R# ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyR' b s R( c B s� e Z d Z e Z d � Z d � Z d � Z d � Z d e d � Z d � Z e d � � Z d � Z d � Z d � Z d � Z e d � � Z RS( sI clones a SupportsAnnotated and applies an 'annotations' dictionary. Unlike regular clones, this clone also mimics __hash__() and __cmp__() of the original element so that it takes its place in hashed collections. A reference to the original element is maintained, for the important reason of keeping its hash value current. When GC'ed, the hash value may be reused, causing conflicts. .. note:: The rationale for Annotated producing a brand new class, rather than placing the functionality directly within ClauseElement, is **performance**. The __hash__() method is absent on plain ClauseElement which leads to significantly reduced function call overhead, as the use of sets and dictionaries against ClauseElement objects is prevalent, but most are not "annotated". c G sg | s t j | � S| \ } } y t | j } Wn# t k rU t | j | � } n Xt j | � Sd S( N( t objectt __new__t annotated_classest __class__t KeyErrort _new_annotation_type( t clst argst elementR ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyR+ � s c C sf | j j � | _ | j j d d � | j j d d � | | _ t j | � | _ t | � | _ d S( NR R ( R t copyR R t _Annotated__elementR R R t hasht _hash( R R2 R ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyt __init__� s c C s | j j | � } | j | � S( N( R R R! 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R t TrueR# R: t propertyR= R R? R@ RB RD ( ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyR( � s c C s0 y | j } Wn t k r! | SX| | � Sd S( N( R t AttributeError( t to_annotatet annotationsR ( ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyt _safe_annotate� s c sF i � � � � � � f d � � | d k r< � | � } n d � | S( s� Deep copy the given ClauseElement, annotating each element with the given annotations dictionary. Elements within the exclude collection will be cloned but not annotated. c s� � | d <t | � } | � k r* � | S� ri t | d � ri | j j � � ri | j d � | � } nW � | j k r� � r� | j r� t | j d � | � � � } q� t | � � } n | } | j d � � | � | <| S( Nt detect_subquery_colst proxy_setR" ( t idt hasattrRM t intersectionR R t _is_immutableRK t _copy_internals( t elemR< t id_t newelem( RJ R" t cloned_idsRL t exclude( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyR" s" N( R ( R2 RJ RW RL ( ( RJ R" RV RL RW sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyt _deep_annotate s c s@ i � � � � f d � � | d k r6 � | � } n d � | S( s2 Deep copy the given element, removing annotations.c si � r t | � } n | } | � k r] | j d � d t � } | j d � � | � | <| S� | Sd S( NR R" ( RN R# RF RR ( RS R< R RU ( R" t clonedR ( sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyR" 5 s N( R ( R2 R ( ( R" RY R sL /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/sql/annotation.pyt _deep_deannotate0 s c C s | j | � } | j � | S( s Annotate the given ClauseElement and copy its internals so that internal objects refer to the new annotated object. Basically used to apply a "don't traverse" annotation to a selectable, without digging throughout the whole structure wasting time. 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