http://snippets.dzone.com/posts Sat, 26 Jul 2008 19:38:11 GMT DZone Snippets: metaprogramming code http://snippets.dzone.com/posts/show/4087 Given an existing object "obj", wraps all of its methods. In this case, the wrapper prints a log of the method invocation, and the call stack of the call, but you can modify it to do anything... <br /> <br /><code> <br />virtual_class = class <<obj; self; end <br /> <br />virtual_class.class_eval { <br /> obj.methods.each { |method| <br /> the_alias = method.gsub(/([^?]+)(\??)/, "\\1_orig\\2").to_sym <br /> alias_method the_alias, method <br /> <br /> define_method(method) { |*args| <br /> args_str = args.map { |a| a.inspect }.join(", ") <br /> unless method == "to_s" <br /> puts "#{self.inspect_orig}.#{method}(#{args_str}) called from #{caller.inspect}" <br /> end <br /> self.send_orig(the_alias, *args) <br /> } <br /> } <br />} <br /></code> Thu, 31 May 2007 23:23:12 GMT http://snippets.dzone.com/posts/show/4087 haberman (Joshua Haberman)