def _dive(self,
ref: str,
path: Path,
visited_refs: ty.Optional[VisitedRefs] = None,
ref_resolver: ty.Optional[RefResolver] = None,
registry: ty.Optional[Registry] = None,
**context: ty.Any) -> ty.Any:
visited_refs = visited_refs or set()
assert ref_resolver is not None
assert registry is not None
try:
with ref_resolver.resolving(ref) as target:
target_path = Path(ref_resolver.resolution_scope)
if target_path in visited_refs:
raise RecursiveReferenceError()
result = registry.get(target_path)
if result is Bad:
raise SchemaError(
Error(path, self.messages['bad_reference']))
elif result is not None:
return result
proxy = ObjectProxy(Dummy)
registry[target_path] = proxy
visited_refs.add(target_path)
try:
result = self._deeper(target,
target_path,
visited_refs=visited_refs,
ref_resolver=ref_resolver,
registry=registry,
**context)
except SchemaError as e:
registry[target_path] = Bad
raise SchemaError(
Error(path, self.messages['bad_reference']), *e.errors)
except RecursiveReferenceError:
registry[target_path] = Bad
raise SchemaError(
Error(path, self.messages['recursive_reference']))
else:
proxy.__wrapped__ = weakref.proxy(result)
registry[target_path] = result
finally:
visited_refs.discard(target_path)
return result
except RefResolutionError:
raise SchemaError(
Error(path, self.messages['unresolvable_reference']))
def _entry(self,
value: ty.Any,
path: Path,
visited_refs: ty.Optional[VisitedRefs] = None,
registry: ty.Optional[Registry] = None,
**context: ty.Any) -> ty.Any:
ref = self._get_ref(value)
if ref is not None:
return self._dive(ref,
path,
visited_refs=visited_refs,
registry=registry,
**context)
else:
assert registry is not None
result = registry.get(path)
if result is Bad:
pass
elif result is not None:
return result
proxy = ObjectProxy(Dummy)
registry[path] = proxy
try:
result = self.subtype.convert(value,
path,
registry=registry,
**context)
except SchemaError:
registry[path] = Bad
raise
else:
proxy.__wrapped__ = weakref.proxy(result)
registry[path] = result
return result
