def _validate_model_factory(factory):
if (factory is None
or isinstance(factory, str)
or IModelFactory.providedBy(factory)):
return factory
if callable(factory):
return staticmethod(factory)
return IModelFactory(factory)
def _got_model_factory(self, model_factory, source, view):
model = source
factory = None
if IModelFactory.providedBy(model_factory):
factory = IModelFactory(model_factory)
elif isinstance(model_factory, str):
factory = get_factory(model_factory)
if factory is not None:
model = factory(source)
return self._init_model(model, view)
def _wrap_source(self, source, view, model_factory):
if source is None:
return source
if IReference.providedBy(source):
return source
if IModel.providedBy(source):
return self._init_model(source, view)
if not IModelFactory.providedBy(model_factory):
if callable(model_factory):
ctx = self.model.make_context(key=self.name, view=view)
d = model_factory(source, ctx)
d.addCallback(self._got_model_factory, source, view)
return d
return self._got_model_factory(model_factory, source, view)