Contents

# encoding: utf-8
#
module Mode
  module Sdk
    # Represents a set of Mode::Column instances
    #
    class ColumnSet
      attr_reader :original_columns

      # Construct a new ColumnSet instance
      #
      # @param original_columns [Array<Hash>] an array of hashes defining
      #   column names and types
      #
      # @return [Mode::Sdk::ColumnSet] the instance
      #
      def initialize(original_columns)
        @original_columns = original_columns
      end

      # Build an array of Mode::Sdk::Column instances
      #
      # @return [Array<Mode::Sdk::Column>] array of columns
      #
      def columns
        @columns ||= (original_columns || []).map do |column|
          Mode::Sdk::Column.new(column)
        end
      end

      # Validate the provided columns
      #
      # @raise [Mode::Sdk::ColumnSet::InvalidError] if no columns are provided
      #
      # @return [true]
      #
      def validate!
        fail InvalidError, 'No columns provided' unless columns.any?

        columns.each(&:validate!)

        true
      end

      # Convert columns to array of hashes
      #
      # @return [Array<Hash>] array of column attribute hashes
      #
      def to_array
        columns.map(&:attributes)
      end

      class InvalidError < StandardError; end
    end
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
mode-sdk-0.1.0	lib/mode/sdk/column_set.rb
mode-sdk-0.0.1	lib/mode/sdk/column_set.rb