def _calculate_object_from_path(self, path_components):
lom_object = None
if not (len(path_components) > 0 and path_components[0] in ROOT_KEYS):
raise AssertionError
selector = self._tuple_element_from_path if path_components[-1] in TUPLE_TYPES.keys() else self._property_object_from_path
lom_object = selector(path_components)
return lom_object
def _calculate_object_from_path(self, path_components):
lom_object = None
if not (len(path_components) > 0 and path_components[0] in ROOT_KEYS):
raise AssertionError
selector = self._tuple_element_from_path if path_components[-1] in TUPLE_TYPES.keys() else self._property_object_from_path
lom_object = selector(path_components)
return lom_object
def _property_object_from_path(self, path_components):
prev_component = path_components[0]
lom_object = get_root_prop(self._external_device, path_components[0])
for component in path_components[1:]:
try:
raise component.isdigit() and (is_object_iterable(lom_object)
or AssertionError)
if not prev_component in TUPLE_TYPES.keys():
raise AssertionError
lom_object = lom_object[int(component)]
else:
lom_object = getattr(lom_object, component)
if isinstance(lom_object, HIDDEN_TYPES):
raise AttributeError
except IndexError:
raise LomAttributeError("invalid index of component '%s'" %
prev_component)
except AttributeError:
raise LomAttributeError("invalid path component '%s'" %
component)
else:
prev_component = component
if not is_lom_object(lom_object, self._lom_classes):
raise LomObjectError("component '%s' is not an object" %
prev_component)
return lom_object
def _find_tuple_element_object_path(self, lom_object, parent):
component = None
for key in sorted(list(TUPLE_TYPES.keys())):
if hasattr(parent, key):
property = getattr(parent, key)
if lom_object in property:
index = list(property).index(lom_object)
component = u'%s %d' % (key, index)
break
return component
def _find_tuple_element_object_path(self, lom_object, parent):
component = None
for key in sorted(list(TUPLE_TYPES.keys())):
if hasattr(parent, key):
property = getattr(parent, key)
if lom_object in property:
index = list(property).index(lom_object)
component = u'%s %d' % (key, index)
break
return component
def _property_object_from_path(self, path_components):
prev_component = path_components[0]
lom_object = get_root_prop(self._external_device, path_components[0])
for component in path_components[1:]:
try:
raise component.isdigit() and (is_object_iterable(lom_object) or AssertionError)
if not prev_component in TUPLE_TYPES.keys():
raise AssertionError
lom_object = lom_object[int(component)]
else:
lom_object = getattr(lom_object, component)
except IndexError:
raise LomAttributeError("invalid index of component '%s'" % prev_component)
except AttributeError:
raise LomAttributeError("invalid path component '%s'" % component)
else:
prev_component = component
if not is_lom_object(lom_object, self._lom_classes):
raise LomObjectError("component '%s' is not an object" % prev_component)
return lom_object
