Contents

require 'cfndsl/Plurals'
class Module
  private
  def dsl_attr_setter(*symbols)
    ##
    # Create setter methods
    #
    # Usage:
    #    class Something
    #      dsl_attr_setter :Thing
    #    end
    #
    # Generates a setter method like this one for each symbol in *symbols:
    #
    # def Thing(value)
    #   @Thing = value
    # end
    #
    symbols.each do |symbol|
      class_eval do 
        define_method(symbol) do |value|
          instance_variable_set( "@#{symbol}", value)
        end
      end	
    end
  end
    
  def dsl_content_object(*symbols)
    ##
    # Create object declaration methods.
    #
    # Usage:
    #   Class Something
    #     dsl_content_object :Stuff
    #   end
    #
    # Generates methods like this:
    #
    # def Stuff(name, *values, &block) 
    #   @Stuffs ||= {}
    #   @Stuffs[name] ||= CfnDsl::#{symbol}Definition.new(*values)
    #   @Stuffs[name].instance_eval &block if block_given?
    #   return @Stuffs[name]
    # end
    #
    # The effect of this is that you can then create named sub-objects
    # from the main object. The sub objects get stuffed into a container
    # on the main object, and the block is then evaluated in the context
    # of the new object.
    #
    symbols.each do |symbol|
      plural = CfnDsl::Plurals::pluralize(symbol) # @@plurals[symbol] || "#{symbol}s"
      pluralvar = "@#{plural}".to_sym
      definition_class = CfnDsl.const_get( "#{symbol}Definition" )
      class_eval do
        define_method(symbol) do |name,*values,&block|
          name = name.to_s
          hash = instance_variable_get( pluralvar )  
          if( ! hash ) then
            hash = {}
            instance_variable_set( pluralvar, hash )
          end
          hash[name] ||= definition_class.new(*values)
          hash[name].instance_eval &block if block 
          return hash[name]
        end 
      end
    end
  end
end

Version data entries

6 entries across 6 versions & 1 rubygems

Version	Path
cfndsl-0.0.11	lib/cfndsl/module.rb
cfndsl-0.0.10	lib/cfndsl/module.rb
cfndsl-0.0.9	lib/cfndsl/module.rb
cfndsl-0.0.8	lib/cfndsl/module.rb
cfndsl-0.0.7	lib/cfndsl/module.rb
cfndsl-0.0.6	lib/cfndsl/module.rb