def obj_class_from_name(cls, objname, objver):
"""Returns a class from the registry based on a name and version."""
if objname not in cls._obj_classes:
LOG.error(_LE('Unable to instantiate unregistered object type '
'%(objtype)s'), dict(objtype=objname))
raise exception.UnsupportedObjectError(objtype=objname)
latest = None
compatible_match = None
for objclass in cls._obj_classes[objname]:
if objclass.VERSION == objver:
return objclass
version_bits = tuple([int(x) for x in objclass.VERSION.split(".")])
if latest is None:
latest = version_bits
elif latest < version_bits:
latest = version_bits
if versionutils.is_compatible(objver, objclass.VERSION):
compatible_match = objclass
if compatible_match:
return compatible_match
latest_ver = '%i.%i' % latest
raise exception.IncompatibleObjectVersion(objname=objname,
objver=objver,
supported=latest_ver)
def obj_from_primitive(cls, primitive, context=None):
"""Simple base-case hydration.
This calls self._attr_from_primitive() for each item in fields.
"""
if primitive['ironic_object.namespace'] != 'ironic':
# NOTE(danms): We don't do anything with this now, but it's
# there for "the future"
raise exception.UnsupportedObjectError(
objtype='%s.%s' % (primitive['ironic_object.namespace'],
primitive['ironic_object.name']))
objname = primitive['ironic_object.name']
objver = primitive['ironic_object.version']
objclass = cls.obj_class_from_name(objname, objver)
return objclass._obj_from_primitive(context, objver, primitive)
