def callback(klass):
""" Called when the class has been created. """
# At this point:-
#
# klass is the callable (usually a class) that takes one argument (the
# adaptee) and returns an appropriate adapter (or None if the adaptation
# is not possible).
# What the adapters created by the factory will adapt from.
if type(from_) is not list:
from_protocols = [from_]
else:
from_protocols = from_
# What the adapters created by the factory will adapt to.
if type(to) is not list:
to_protocols = [to]
else:
to_protocols = to
if factory is None:
# If the adapter is cached or has a 'when' expression then create a
# default factory:
adapter_factory = klass
if when != '':
def _conditional_factory(adaptee, *args, **kw):
namespace = {'adaptee': adaptee}
if eval(when, namespace, namespace):
return klass(adaptee, *args, **kw)
return None
adapter_factory = _conditional_factory
if cached:
adapter_factory = CachedAdapterFactory(factory=adapter_factory)
else:
adapter_factory = factory
for from_protocol in from_protocols:
for to_protocol in to_protocols:
register_factory(adapter_factory, from_protocol, to_protocol)
for to_protocol in to_protocols:
# We cannot register adapter factories that are functions. (This is
# ony relevant when using 'adapts' as a function.
if isinstance(klass, type):
# We use type(to_protocol) in case the to_protocols implements
# its own 'register' method which overrides the ABC method.
type(to_protocol).register(to_protocol, klass)
return klass
def callback(klass):
""" Called when the class has been created. """
# At this point:-
#
# klass is the callable (usually a class) that takes one argument (the
# adaptee) and returns an appropriate adapter (or None if the adaptation
# is not possible).
# What the adapters created by the factory will adapt from.
if type(from_) is not list:
from_protocols = [from_]
else:
from_protocols = from_
# What the adapters created by the factory will adapt to.
if type(to) is not list:
to_protocols = [to]
else:
to_protocols = to
if factory is None:
# If the adapter is cached or has a 'when' expression then create a
# default factory:
adapter_factory = klass
if when != '':
def _conditional_factory(adaptee, *args, **kw):
namespace = {'adaptee': adaptee}
if eval(when, namespace, namespace):
return klass(adaptee, *args, **kw)
return None
adapter_factory = _conditional_factory
if cached:
adapter_factory = CachedAdapterFactory(factory=adapter_factory)
else:
adapter_factory = factory
for from_protocol in from_protocols:
for to_protocol in to_protocols:
register_factory(adapter_factory, from_protocol, to_protocol)
for to_protocol in to_protocols:
# We cannot register adapter factories that are functions. (This is
# ony relevant when using 'adapts' as a function.
if isinstance(klass, type):
# We use type(to_protocol) in case the to_protocols implements
# its own 'register' method which overrides the ABC method.
type(to_protocol).register(to_protocol, klass)
return klass
def declareAdapter(factory, provides,
forTypes=(), forProtocols=(), forObjects=()):
from traits.adaptation.api import register_factory
from itertools import chain
for from_protocol in chain(forTypes, forProtocols, forObjects):
for to_protocol in provides:
register_factory(factory, from_protocol, to_protocol)
def declareAdapter(factory,
provides,
forTypes=(),
forProtocols=(),
forObjects=()):
from traits.adaptation.api import register_factory
from itertools import chain
for from_protocol in chain(forTypes, forProtocols, forObjects):
for to_protocol in provides:
register_factory(factory, from_protocol, to_protocol)
def test_global_convenience_functions(self):
ex = self.examples
# Global `register_factory`.
register_factory(factory=ex.UKStandardToEUStandard,
from_protocol=ex.UKStandard,
to_protocol=ex.EUStandard)
uk_plug = ex.UKPlug()
# Global `adapt`.
eu_plug = adapt(uk_plug, ex.EUStandard)
self.assertIsNotNone(eu_plug)
self.assertIsInstance(eu_plug, ex.UKStandardToEUStandard)
# Global `provides_protocol`.
self.assertTrue(provides_protocol(ex.UKPlug, ex.UKStandard))
# Global `supports_protocol`.
self.assertTrue(supports_protocol(uk_plug, ex.EUStandard))
def test_global_convenience_functions(self):
ex = self.examples
# Global `register_factory`.
register_factory(
factory = ex.UKStandardToEUStandard,
from_protocol = ex.UKStandard,
to_protocol = ex.EUStandard
)
uk_plug = ex.UKPlug()
# Global `adapt`.
eu_plug = adapt(uk_plug, ex.EUStandard)
self.assertIsNotNone(eu_plug)
self.assertIsInstance(eu_plug, ex.UKStandardToEUStandard)
# Global `provides_protocol`.
self.assertTrue(provides_protocol(ex.UKPlug, ex.UKStandard))
# Global `supports_protocol`.
self.assertTrue(supports_protocol(uk_plug, ex.EUStandard))
