def test_import_c_accel(self):
import sys
old_pp = FUT.PURE_PYTHON
assert not hasattr(sys, 'import_c_accel')
sys.import_c_accel = self
try:
FUT.PURE_PYTHON = False
d = {'__name__': 'foo', 'import_c_accel': self}
FUT.import_c_accel(d, 'sys')
assert_that(d, has_key('modules'))
assert_that(d, has_entry('__name__', 'sys'))
self.assertNotIn('import_c_accel', d)
FUT.import_c_accel(d, 'sys')
finally:
FUT.PURE_PYTHON = old_pp
del sys.import_c_accel
FutureWarning
)
if policy is NotGiven:
if policy_name is not NotGiven:
policy = getUtility(IExternalizationPolicy, policy_name)
else:
policy = manager_top[2]
memos = manager_top[1]
if memos is None:
# Don't live beyond this dynamic function call
memos = defaultdict(dict)
state = _ExternalizationState(memos, name, catch_components, catch_component_action,
request,
default_non_externalizable_replacer,
decorate, useCache, decorate_callback, policy)
_manager_push((name, memos, policy))
try:
return _to_external_object_state(obj, state, top_level=True)
finally:
_manager_pop()
from nti.externalization._compat import import_c_accel # pylint:disable=wrong-import-position,wrong-import-order
import_c_accel(globals(), 'nti.externalization.externalization._externalizer')
# XXX: We have a public user of this in nti.ntiids.oids. We need
# to document this and probably move it to a different module, or
# provide a cleaner simpler replacement.
for x in fields:
value = getattr(self, x, None)
if value is None:
continue
if converter is not None:
value = converter(value)
if value is not None:
result[ext_name] = value
return value
# Nothing. Can we adapt it?
if sup_iface is not None and sup_fields:
self = sup_iface(self, None)
if self is not None:
return choose_field(result,
self,
ext_name,
converter=sup_converter,
fields=sup_fields)
# Falling off the end: return None
return None
from nti.externalization._compat import import_c_accel # pylint:disable=wrong-import-position,wrong-import-order
import_c_accel(globals(), 'nti.externalization.externalization._fields')
Create and send an `~.ObjectModifiedFromExternalEvent` for
*containedObject* using `zope.event.notify`.
The *containedObject* is the subject of the event. The
*externalObject* is the dictionary of data that was used to update
the *containedObject*.
*external_keys* is list of keys from *externalObject* that
actually changed *containedObject*. If this is not given, we
assume that all keys in *externalObject* were changed. Note that
these should to correspond to the interface fields of interfaces
that the *containedObject* implements in order to properly be able
to create and populate the `zope.lifecycleevent` `~zope.lifecycleevent.IAttributes`.
*updater*, if given, is the `~nti.externalization.interfaces.IInternalObjectUpdater`
instance that was used to handle the updates. If this object implements
an ``_ext_adjust_modified_event`` method, it will be called to adjust (and return)
the event object that will be notified.
*kwargs* are the keyword arguments passed to the event constructor.
:return: The event object that was notified.
"""
return _notifyModified(containedObject, externalObject, updater, external_keys,
kwargs)
from nti.externalization._compat import import_c_accel # pylint:disable=wrong-import-position,wrong-import-order
import_c_accel(globals(), 'nti.externalization.internalization._events')
externalObject[k] = _update_from_external_object(
new_obj, v, args)
if _obj_has_usable_updateFromExternalObject(containedObject):
# legacy support. The __ext_ignore_updateFromExternalObject__
# allows a transition to an adapter without changing
# existing callers and without triggering infinite recursion
updater = containedObject
else:
# It's possible for INamedExternalizedObjectFactoryFinder and
# IInternalObjectUpdater to be registered at two different levels
# of specificity, so we need to look up IInternalObjectUpdater,
# not test if it's provided by what we already have.
if args.require_updater and not isinstance(containedObject, dict):
updater = IInternalObjectUpdater(containedObject)
else:
updater = IInternalObjectUpdater(containedObject, None)
if updater is not None:
notify_event(
ObjectWillUpdateFromExternalEvent(containedObject, externalObject,
args.root))
_invoke_updater(containedObject, externalObject, updater,
external_keys, args)
return containedObject
from nti.externalization._compat import import_c_accel # pylint:disable=wrong-import-position,wrong-import-order
import_c_accel(globals(), 'nti.externalization.internalization._updater')
attrs[key] = cache
cache_instances.add(cache)
return cache
def cache_for(externalizer,
ext_self): # type: (object, object) -> InterfaceCache
return cache_for_key_in_providedBy(type(externalizer),
providedBy(ext_self))
def _cache_cleanUp(instances):
# XXX: On PyPy (3 only?) ``list(instances)`` has been
# seen to raise "RuntimeError: set changed size during iteration."
# We should probably try to run a gc.collect() before iterating it.
for x in list(instances):
x.__init__()
try:
from zope.testing import cleanup
except ImportError: # pragma: no cover
pass
else:
cleanup.addCleanUp(_cache_cleanUp, args=(cache_instances, ))
# pylint:disable=wrong-import-position
from nti.externalization._compat import import_c_accel
import_c_accel(globals(), 'nti.externalization.__interface_cache')
:param bool case_sensitive: If False (the default), then the results will
have each factory twice, once with its found name, and once
with its name lower cased.
:return: An iterable of found (name, factory).
"""
# It's not totally clear why this is in legacy_factories;
# it's used from modern stuff like ext:registerAutoPackageIO
result = []
mod_name = module.__name__
# If we're dealing with a namespace object, such as what
# AutoPackaegIO produces, it may represent types from many modules
# on purpose. OTOH, if we get here via a string that was supposed
# to be a module, then we need to respect that and ignore imports.
# This is complicated by the fact that zope.deprecation puts DeprecationProxy
# objects into sys.modules, but they appear to handle that correctly
accept_any_module = not isinstance(module, types.ModuleType)
for name, value in sorted(vars(module).items()):
if (callable(value)
and getattr(value, '__external_can_create__', False)
and (accept_any_module or getattr(value, '__module__', NotGiven) == mod_name)):
result.append((name, value))
if not case_sensitive and name.lower() != name:
result.append((name.lower(), value))
return result
# pylint:disable=wrong-import-position,wrong-import-order
from nti.externalization._compat import import_c_accel
import_c_accel(globals(), 'nti.externalization.internalization._legacy_factories')
ancestor = object
for ancestor in cls.mro():
if '__new__' in ancestor.__dict__:
break
if isinstance(ancestor, SingletonMetaclass) and ancestor is not cls:
ctor = ancestor._new_instance
else:
ctor = cls.__new__
cls._new_instance = staticmethod(ctor)
the_instance = ctor(cls)
cls.__new__ = staticmethod(lambda *args: the_instance)
return cls
SingletonDecorator = SingletonMetaclass # BWC
Singleton = SingletonMetaclass(
'Singleton', (object, ), {
'__doc__':
"A base class for singletons. "
"Can be more convenient than a metaclass for Python2/Python3 compatibility."
})
from nti.externalization._compat import import_c_accel
import_c_accel(globals(), 'nti.externalization._singleton')
# In that case, we are not suitable for use with this object.
# TODO: This algorithm can and should be better in some cases, following the
# C3 algorithm that __sro__ derivation itself uses.
for iface in self._ext_schemas_to_consider(ext_self):
if iface is most_derived:
# Support interfaces that have their __module__ changed
# dynamically (e.g., test_benchmarks)
continue
if not most_derived.isOrExtends(iface):
raise TypeError(
"Most derived interface %s does not extend %s; non-tree interface structure. "
"Searching module %s and considered %s on object %s of class %s and type %s"
% (most_derived, iface, self._ext_search_module,
list(self._ext_schemas_to_consider(ext_self)), ext_self,
ext_self.__class__, type(ext_self)))
return most_derived
def _ext_schemas_to_consider(self, ext_self):
search_module_name = self._ext_search_module.__name__
return [
x for x in interface.providedBy(ext_self)
if x.__module__ == search_module_name
and not x.queryDirectTaggedValue('_ext_is_marker_interface')
]
# pylint:disable=wrong-import-position,wrong-import-order
from nti.externalization._compat import import_c_accel
import_c_accel(globals(), 'nti.externalization._datastructures')
Instances are immutable.
This class must not be subclassed; as such, there is no interface
for it, merely the class itself.
"""
__slots__ = ('use_iso8601_for_unix_timestamp', )
def __init__(self, use_iso8601_for_unix_timestamp=False):
#: Should unix timestamp fields be output as their numeric value,
#: or be converted into an ISO 8601 timestamp string? By default,
#: the numeric value is output. This is known to specifically apply
#: to "Created Time" and "Last Modified."
self.use_iso8601_for_unix_timestamp = use_iso8601_for_unix_timestamp
def __repr__(self): # pragma: no cover
return "ExternalizationPolicy(use_iso8601_for_unix_timestamp=%s)" % (
self.use_iso8601_for_unix_timestamp)
#: The default externalization policy.
DEFAULT_EXTERNALIZATION_POLICY = ExternalizationPolicy()
def get_default_externalization_policy():
return DEFAULT_EXTERNALIZATION_POLICY
from nti.externalization._compat import import_c_accel # pylint:disable=wrong-import-position
import_c_accel(globals(), 'nti.externalization.__base_interfaces')
return internal_to_standard_external_dictionary(
self,
mergeFrom,
decorate,
request,
decorate_callback,
policy,
)
def to_minimal_standard_external_dictionary(self, mergeFrom=None):
"""
Does no decoration. Useful for non-'object' types. *self* should have a *mime_type* field.
"""
result = make_external_dict()
if mergeFrom is not None:
result.update_from_other(mergeFrom)
if StandardExternalFields.CLASS not in result:
get_class(self, result)
mime_type = getattr(self, 'mimeType', None) or getattr(
self, 'mime_type', None)
if mime_type is not None and mime_type:
result[StandardExternalFields.MIMETYPE] = mime_type
return result
from nti.externalization._compat import import_c_accel # pylint:disable=wrong-import-position,wrong-import-order
import_c_accel(globals(), 'nti.externalization.externalization._dictionary')
request = get_current_request()
if request is not None:
# Request specific decorating, if given, is more specific than plain object
# decorating, so it gets to go last.
for decorator in subscribers((original_object, request),
decorate_interface):
meth = getattr(decorator, decorate_meth_name)
meth(original_object, external_object)
elif call_if_not_decorate is not NotGiven and call_if_not_decorate is not None:
# XXX: This makes no sense. What is this argument even for?
call_if_not_decorate(original_object, external_object)
return external_object
def decorate_external_mapping(
original_object,
external_object,
registry, # legacy, ignored. pylint:disable=unused-argument
request):
# A convenience API exposed to Python in __init__.py
return decorate_external_object(True, None,
IExternalStandardDictionaryDecorator,
'decorateExternalMapping', original_object,
external_object, None, request)
from nti.externalization._compat import import_c_accel # pylint:disable=wrong-import-position,wrong-import-order
import_c_accel(globals(), 'nti.externalization.externalization._decorate')