text: # Copyright (C) 2019 ZTE. 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 rest_framework import serializers
  from .ext_virtual_link_data import ExtVirtualLinkDataSerizlizer
  from .vim_connection_info import VimConnectionInfoSerializer
  
  
  class ChangeExtVnfConnectivityRequestSerializer(serializers.Serializer):
      extVirtualLinks = ExtVirtualLinkDataSerizlizer(
          help_text="Information about external VLs to change (e.g. connect the VNF to).",
          many=True,
          required=True,
          allow_null=False
      )
      vimConnectionInfo = VimConnectionInfoSerializer(
          help_text="Information about VIM connections to be used for " +
          "managing the resources for the VNF instance, " +
          "or refer to external virtual links." +
          "This attribute shall only be supported and may be present " +
          "if VNF-related resource management in direct mode is applicable.",
          many=True,
          required=False,
          allow_null=True
      )
      additionalParams = serializers.DictField(
          help_text="Additional parameters passed by the NFVO as input to the process, " +
          "specific to the VNF of which the external connectivity is changed, " +
          "as declared in the VNFD as part of 'ChangeExtVnfConnectivityOpConfig'.",
          required=False,
          allow_null=True
      )
  