Module: Roxy::Moxie::ClassMethods

Defined in:
lib/roxy/moxie.rb

Instance Method Summary collapse

Instance Method Details

#proxy(name, options = {}, &block) ⇒ Object

Set up this class to proxy on the given name



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# File 'lib/roxy/moxie.rb', line 11

def proxy(name, options = {}, &block)
  
  # Make sure args are OK
  original_method = method_defined?(name) ? instance_method(name) : nil
  raise "Cannot proxy an existing method, \"#{name}\", and also have a :to option.  Please use one or the other." if
    original_method and options[:to]  
  
  # If we're proxying an existing method, we need to store
  # the original method and move it out of the way so
  # we can take over
  if original_method        
    new_method = "proxied_#{name}"
    alias_method new_method, "#{name}"
    options[:to] = original_method
  end
  
  # Thanks to Jerry for this simplification of my original class_eval approach
  # http://ryandaigle.com/articles/2008/11/10/implement-ruby-proxy-objects-with-roxy/comments/8059#comment-8059
  if !original_method or original_method.arity == 0
    define_method name do
      (@proxy_for ||= {})[name] ||= Proxy.new(self, options, nil, &block)
    end
  else
    define_method name do |*args|
      Proxy.new(self, options, args, &block)
    end
  end      
end