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 IVersionAdapter.providedBy(value):
source = self.get_source_ver(value, snapshot)
target = self.get_target_ver(value, snapshot)
if target is not None:
if target != source:
snapshot = value.adapt_version(snapshot, source, target)
value.store_version(snapshot, target, self._version_atom)
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 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 IVersionAdapter.providedBy(value):
source = self.get_source_ver(value, snapshot)
target = self.get_target_ver(value, snapshot)
if target is not None:
if target != source:
snapshot = value.adapt_version(snapshot, source, target)
value.store_version(snapshot, target, self._version_atom)
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
def convert(self, data):
try:
# Pre-convert the data if a convertor was specified
converted = self.pre_convertion(data)
# Unpack the first level of values
unpacked = self.unpack_data(converted)
# Continue unpacking level by level
self.finish_unpacking()
# Inform object that it has migrated if this is a case
if (IVersionAdapter.providedBy(unpacked) and self._migrated):
unpacked.set_migrated()
# Should be finished by now
return unpacked
finally:
# Reset the state to cleanup all references
self.reset()
def convert(self, data):
try:
# Pre-convert the data if a convertor was specified
converted = self.pre_convertion(data)
# Unpack the first level of values
unpacked = self.unpack_data(converted)
# Continue unpacking level by level
self.finish_unpacking()
# Inform object that it has migrated if this is a case
if (IVersionAdapter.providedBy(unpacked) and
self._migrated):
unpacked.set_migrated()
# Should be finished by now
return unpacked
finally:
# Reset the state to cleanup all references
self.reset()