Contents

module Humidifier
  module Reservoir
    # Contains the configuration for a mapping between a YAML file name and an
    # AWS resource. May optionally contain a Mapper (uses the BaseMapper) by
    # default.
    class Mapping
      attr_reader :clazz, :mapper

      def initialize(opts = {}, &block)
        @clazz = Humidifier[normalized(opts[:to])]
        raise Error, "Invalid resource: #{opts[:to].inspect}" if @clazz.nil?

        if opts[:using] && block_given?
          raise Error, 'Cannot specify :using and provide an anonymous mapper'
        end

        @mapper = mapper_from(opts, &block)
      end

      def resource_for(name, attributes)
        mapper.resource_for(clazz, name, attributes)
      end

      private

      def mapper_from(opts, &block)
        if opts[:using]
          opts[:using].new
        elsif block_given?
          Class.new(BaseMapper, &block).new
        else
          BaseMapper.new
        end
      end

      def normalized(to)
        to.start_with?('AWS') ? to : "AWS::#{to}"
      end
    end
  end
end

Version data entries

6 entries across 6 versions & 1 rubygems

Version	Path
humidifier-reservoir-0.4.0	lib/humidifier/reservoir/mapping.rb
humidifier-reservoir-0.3.0	lib/humidifier/reservoir/mapping.rb
humidifier-reservoir-0.2.3	lib/humidifier/reservoir/mapping.rb
humidifier-reservoir-0.2.2	lib/humidifier/reservoir/mapping.rb
humidifier-reservoir-0.2.1	lib/humidifier/reservoir/mapping.rb
humidifier-reservoir-0.2.0	lib/humidifier/reservoir/mapping.rb