def _adapt_snapshot(self, restorator, snapshot):
if self._source_ver is not None:
# TODO: If external adapter is needed change this to a cast
if IVersionAdapter.providedBy(restorator):
adapter = IVersionAdapter(restorator)
snapshot = adapter.adapt_version(snapshot, self._source_ver, self._target_ver)
return snapshot
def flatten_instance(self, value, caps, freezing):
self.check_capabilities(Capabilities.instance_values, value, caps, freezing)
referenceable = getattr(value, "referenceable", True)
if referenceable:
deref = self._prepare(value)
if deref is not None:
return deref
snapshot = value.snapshot()
if self._source_ver is not None:
# TODO: If external adapter is needed change this to a cast
if IVersionAdapter.providedBy(value):
adapter = IVersionAdapter(value)
snapshot = adapter.adapt_version(snapshot, self._source_ver, self._target_ver)
dump = self.flatten_value(snapshot, caps, freezing)
if freezing:
packer, data = self.pack_frozen_instance, [dump]
else:
packer, data = (self.pack_instance, [[self.pack_type_name, value.type_name], dump])
if referenceable:
return self._preserve(value, packer, data)
else:
return packer, data
def _adapt_snapshot(self, restorator, snapshot):
try:
adapter = IVersionAdapter(restorator)
except TypeError:
pass
else:
target = self.get_target_ver(restorator, snapshot)
source = self.get_source_ver(restorator, snapshot)
if target is not None and target != source:
snapshot = adapter.adapt_version(snapshot, source, target)
return snapshot