try_chain.rb

#doesn't accept args for the methods... probably next on that
class Object
  def try_chain(*args)
    method = args.shift
    if respond_to?(method)
      args.empty? ? self.send(method) : self.send(method).try_chain(*args)
    else
      nil
    end
  end
end


class MyClass 
  attr_accessor :domain_object
  attr_accessor :text_value
  def initialize(domain_object,text_value=nil)
    @domain_object = domain_object
    @text_value = text_value
  end
  def to_s 
    return @text_value + " to_s"
  end
end


obj = MyClass.new(MyClass.new(MyClass.new(nil,"obj3"),"obj2"),"obj 1")

puts obj.try_chain(:domain_object)
puts obj.domain_object
puts "*******"
puts obj.try_chain(:domain_object,:domain_object,:domain_object,:domain_object)
puts obj.domain_object.domain_object.text_value
puts "*******"
puts obj.try_chain(:domain_object,:text_value)
puts obj.try_chain(:text_value)
puts obj.try_chain(:domain_object,:domain_object)

obj2 to_s
obj2 to_s
*******
nil
obj3
*******
obj2
obj 1
obj3 to_s