michaelmior / NoSE

module NoSE

  # Loaders which insert data into indexes from external sources

  module Loader

    # Superclass for all data loaders

    class LoaderBase

      def initialize(workload = nil, backend = nil)

        @workload = workload

        @backend = backend

      end

      # :nocov:

      # @abstract Subclasses should produce a workload

      # @return [void]

      # :nocov:

      # @abstract Subclasses should load data for the given list of indexes

      # @return [void]

      def load(_indexes, _config, _show_progress = false, _limit = nil,

               _skip_existing = true)

        fail NotImplementedError

      end

      # :nocov:

      # @abstract Subclasses should generate a model from the external source

      # :nocov:

      def model(_config)

        fail NotImplementedError

      end

      # :nocov:

    end

  end

end