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# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from neutron_lib.utils import runtime
NEUTRON_OBJECT_NAMESPACE = 'neutron.objects'
_REGISTRY = runtime.NamespacedPlugins(NEUTRON_OBJECT_NAMESPACE)
def load_class(object_class_name):
"""Return the versioned object for the given class name.
:param object_class_name: The class name of the versioned object to
get.
:returns: A reference to the class for the said object_class_name.
"""
return _REGISTRY.get_plugin_class(object_class_name)
def new_instance(object_class_name, *inst_args, **inst_kwargs):
"""Create a new instance of a versioned object.
:param object_class_name: The name of the versioned object's class to
instantiate.
:param inst_args: Any args pass onto the constructor of the versioned
object when creating it.
:param inst_kwargs: Any kwargs to pass onto the constructor of the object
when creating it.
:returns: A new instance of the versioned object.
"""
return _REGISTRY.new_plugin_instance(
object_class_name, *inst_args, **inst_kwargs)
def contains(object_class_name):
"""Determine if a given versioned object is loaded.
:param object_class_name: The class name of the versioned object to check
for.
:returns: True if the versioned object is loaded, and False otherwise.
"""
return object_class_name in _REGISTRY.loaded_plugin_names
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