text: # Copyright 2013 OpenStack Foundation.
  # All Rights Reserved.
  #
  #    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.api import extensions as api_extensions
  
  from neutron._i18n import _
  from neutron.api import extensions
  from neutron.api.v2 import base
  from neutron.db import servicetype_db
  
  
  RESOURCE_NAME = "service_provider"
  COLLECTION_NAME = "%ss" % RESOURCE_NAME
  SERVICE_ATTR = 'service_type'
  PLUGIN_ATTR = 'plugin'
  DRIVER_ATTR = 'driver'
  EXT_ALIAS = 'service-type'
  
  # Attribute Map for Service Provider Resource
  # Allow read-only access
  RESOURCE_ATTRIBUTE_MAP = {
      COLLECTION_NAME: {
          'service_type': {'allow_post': False, 'allow_put': False,
                           'is_visible': True},
          'name': {'allow_post': False, 'allow_put': False,
                   'is_visible': True},
          'default': {'allow_post': False, 'allow_put': False,
                      'is_visible': True},
      }
  }
  
  
  class Servicetype(api_extensions.ExtensionDescriptor):
  
      @classmethod
      def get_name(cls):
          return _("Neutron Service Type Management")
  
      @classmethod
      def get_alias(cls):
          return EXT_ALIAS
  
      @classmethod
      def get_description(cls):
          return _("API for retrieving service providers for "
                   "Neutron advanced services")
  
      @classmethod
      def get_updated(cls):
          return "2013-01-20T00:00:00-00:00"
  
      @classmethod
      def get_resources(cls):
          """Returns Extended Resource for service type management."""
          attr_map = RESOURCE_ATTRIBUTE_MAP[COLLECTION_NAME]
          collection_name = COLLECTION_NAME.replace('_', '-')
          controller = base.create_resource(
              collection_name,
              RESOURCE_NAME,
              servicetype_db.ServiceTypeManager.get_instance(),
              attr_map)
          return [extensions.ResourceExtension(collection_name,
                                               controller,
                                               attr_map=attr_map)]
  
      def get_extended_resources(self, version):
          if version == "2.0":
              return RESOURCE_ATTRIBUTE_MAP
          else:
              return {}
  