text: # coding=utf-8
  # Copyright 2018-2020 EVA
  #
  # 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 eva.parser.load_statement import LoadDataStatement
  from eva.parser.evaql.evaql_parserVisitor import evaql_parserVisitor
  from eva.parser.evaql.evaql_parser import evaql_parser
  
  from eva.parser.table_ref import TableRef
  from eva.parser.types import FileFormatType
  
  
  class Load(evaql_parserVisitor):
      def visitLoadStatement(self, ctx: evaql_parser.LoadStatementContext):
          file_path = self.visit(ctx.fileName()).value
          table = TableRef(self.visit(ctx.tableName()))
  
          # Set default for file_format as Video
          file_format = FileFormatType.VIDEO
          file_options = {}
          file_options['file_format'] = file_format
  
          if ctx.fileOptions():
              file_options = self.visit(ctx.fileOptions())
  
          # set default for column_list as None
          column_list = None
          if ctx.uidList():
              column_list = self.visit(ctx.uidList())
  
          stmt = LoadDataStatement(table, file_path, column_list, 
                                   file_options)
          return stmt
  
      def visitFileOptions(self, ctx: evaql_parser.FileOptionsContext):
          file_format = FileFormatType.VIDEO
          # Check the file format 
          if ctx.CSV() is not None:
              file_format = FileFormatType.CSV
  
          # parse and add more file options in future
          file_options = {}
          file_options['file_format'] = file_format
  
          return file_options
  