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Name	Size	Permission
__init__.py	1.68 KB	-rw-r--r--
__init__.pyc	2.56 KB	-rw-r--r--
annotation.py	5.97 KB	-rw-r--r--
annotation.pyc	6.39 KB	-rw-r--r--
base.py	20.97 KB	-rw-r--r--
base.pyc	26.95 KB	-rw-r--r--
compiler.py	106.86 KB	-rw-r--r--
compiler.pyc	94.95 KB	-rw-r--r--
ddl.py	28.02 KB	-rw-r--r--
ddl.pyc	31.76 KB	-rw-r--r--
default_comparator.py	12.82 KB	-rw-r--r--
default_comparator.pyc	10.57 KB	-rw-r--r--
dml.py	29.35 KB	-rw-r--r--
dml.pyc	29.88 KB	-rw-r--r--
elements.py	119.21 KB	-rw-r--r--
elements.pyc	135.15 KB	-rw-r--r--
expression.py	5.54 KB	-rw-r--r--
expression.pyc	5.74 KB	-rw-r--r--
functions.py	17.46 KB	-rw-r--r--
functions.pyc	20.95 KB	-rw-r--r--
naming.py	4.48 KB	-rw-r--r--
naming.pyc	5.3 KB	-rw-r--r--
operators.py	21.98 KB	-rw-r--r--
operators.pyc	31.5 KB	-rw-r--r--
schema.py	131.69 KB	-rw-r--r--
schema.pyc	130.05 KB	-rw-r--r--
selectable.py	108.96 KB	-rw-r--r--
selectable.pyc	114.6 KB	-rw-r--r--
sqltypes.py	53.35 KB	-rw-r--r--
sqltypes.pyc	61.85 KB	-rw-r--r--
type_api.py	36.81 KB	-rw-r--r--
type_api.pyc	38.79 KB	-rw-r--r--
util.py	19.04 KB	-rw-r--r--
util.pyc	19.91 KB	-rw-r--r--
visitors.py	9.71 KB	-rw-r--r--
visitors.pyc	11.73 KB	-rw-r--r--

Code Editor : annotation.py

# sql/annotation.py
# Copyright (C) 2005-2014 the SQLAlchemy authors and contributors
# <see AUTHORS file>
#
# This module is part of SQLAlchemy and is released under
# the MIT License: http://www.opensource.org/licenses/mit-license.php

"""The :class:`.Annotated` class and related routines; creates hash-equivalent
copies of SQL constructs which contain context-specific markers and
associations.

"""

from .. import util
from . import operators

class Annotated(object):
    """clones a ClauseElement 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.

"""

def __new__(cls, *args):
        if not args:
            # clone constructor
            return object.__new__(cls)
        else:
            element, values = args
            # pull appropriate subclass from registry of annotated
            # classes
            try:
                cls = annotated_classes[element.__class__]
            except KeyError:
                cls = _new_annotation_type(element.__class__, cls)
            return object.__new__(cls)

def __init__(self, element, values):
        self.__dict__ = element.__dict__.copy()
        self.__element = element
        self._annotations = values

def _annotate(self, values):
        _values = self._annotations.copy()
        _values.update(values)
        return self._with_annotations(_values)

def _with_annotations(self, values):
        clone = self.__class__.__new__(self.__class__)
        clone.__dict__ = self.__dict__.copy()
        clone._annotations = values
        return clone

def _deannotate(self, values=None, clone=True):
        if values is None:
            return self.__element
        else:
            _values = self._annotations.copy()
            for v in values:
                _values.pop(v, None)
            return self._with_annotations(_values)

def _compiler_dispatch(self, visitor, **kw):
        return self.__element.__class__._compiler_dispatch(
            self, visitor, **kw)

@property
    def _constructor(self):
        return self.__element._constructor

def _clone(self):
        clone = self.__element._clone()
        if clone is self.__element:
            # detect immutable, don't change anything
            return self
        else:
            # update the clone with any changes that have occurred
            # to this object's __dict__.
            clone.__dict__.update(self.__dict__)
            return self.__class__(clone, self._annotations)

def __hash__(self):
        return hash(self.__element)

def __eq__(self, other):
        if isinstance(self.__element, operators.ColumnOperators):
            return self.__element.__class__.__eq__(self, other)
        else:
            return hash(other) == hash(self)

# hard-generate Annotated subclasses.  this technique
# is used instead of on-the-fly types (i.e. type.__new__())
# so that the resulting objects are pickleable.
annotated_classes = {}

def _deep_annotate(element, annotations, exclude=None):
    """Deep copy the given ClauseElement, annotating each element
    with the given annotations dictionary.

Elements within the exclude collection will be cloned but not annotated.

"""
    def clone(elem):
        if exclude and \
                hasattr(elem, 'proxy_set') and \
                elem.proxy_set.intersection(exclude):
            newelem = elem._clone()
        elif annotations != elem._annotations:
            newelem = elem._annotate(annotations)
        else:
            newelem = elem
        newelem._copy_internals(clone=clone)
        return newelem

if element is not None:
        element = clone(element)
    return element

def _deep_deannotate(element, values=None):
    """Deep copy the given element, removing annotations."""

cloned = util.column_dict()

def clone(elem):
        # if a values dict is given,
        # the elem must be cloned each time it appears,
        # as there may be different annotations in source
        # elements that are remaining.  if totally
        # removing all annotations, can assume the same
        # slate...
        if values or elem not in cloned:
            newelem = elem._deannotate(values=values, clone=True)
            newelem._copy_internals(clone=clone)
            if not values:
                cloned[elem] = newelem
            return newelem
        else:
            return cloned[elem]

if element is not None:
        element = clone(element)
    return element

def _shallow_annotate(element, annotations):
    """Annotate the given ClauseElement and copy its internals so that
    internal objects refer to the new annotated object.

Basically used to apply a "dont traverse" annotation to a
    selectable, without digging throughout the whole
    structure wasting time.
    """
    element = element._annotate(annotations)
    element._copy_internals()
    return element

def _new_annotation_type(cls, base_cls):
    if issubclass(cls, Annotated):
        return cls
    elif cls in annotated_classes:
        return annotated_classes[cls]

for super_ in cls.__mro__:
        # check if an Annotated subclass more specific than
        # the given base_cls is already registered, such
        # as AnnotatedColumnElement.
        if super_ in annotated_classes:
            base_cls = annotated_classes[super_]
            break

annotated_classes[cls] = anno_cls = type(
        "Annotated%s" % cls.__name__,
        (base_cls, cls), {})
    globals()["Annotated%s" % cls.__name__] = anno_cls
    return anno_cls

def _prepare_annotations(target_hierarchy, base_cls):
    stack = [target_hierarchy]
    while stack:
        cls = stack.pop()
        stack.extend(cls.__subclasses__())

_new_annotation_type(cls, base_cls)

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Code Editor : annotation.py