module RubyXL::OOXMLObjectClassMethods

def process_attribute(obj, raw_value, params)
  val = raw_value &&
          case params[:attr_type]
          when :double then Float(raw_value)  # http://www.datypic.com/sc/xsd/t-xsd_double.html
          when :string then raw_value
          when Array   then raw_value # Case of Simple Types
          when :sqref  then RubyXL::Sqref.new(raw_value)
          when :ref    then RubyXL::Reference.new(raw_value)
          when :bool   then ['1', 'true'].include?(raw_value)  # http://www.datypic.com/sc/xsd/t-xsd_boolean.html
          when :int    then Integer(raw_value)
          when :uint   then
            v = Integer(raw_value)
            raise ArgumentError.new("invalid value for unsigned Integer(): \"#{raw_value}\"") if v < 0
            v
          end
  obj.send("#{params[:accessor]}=", val)
end