text: #
  # Copyright (c) 2021, NVIDIA CORPORATION.
  #
  # 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 nvtabular.dispatch import DataFrameType
  
  from .operator import ColumnSelector, Operator
  
  
  class AddMetadata(Operator):
      """
      This operator will add user defined tags and properties
      to a Schema.
      """
  
      def __init__(self, tags=None, properties=None):
          super().__init__()
          self.tags = tags or []
          self.properties = properties or {}
  
      def transform(self, col_selector: ColumnSelector, df: DataFrameType) -> DataFrameType:
          return df
  
      @property
      def output_tags(self):
          return self.tags
  
      @property
      def output_properties(self):
          return self.properties
  