Converting to a Java charset feels really wrong to me. For 1.9 support I would almost prefer working directly with a RubyString and using cat19 over that. The main problem is not all supported Encodings in Ruby have an equaivalent Java Charset (although this is pretty rare). I won't close this atm and perhaps @headius or @lopex may have a better solution. I feel like this entire method needs to be rewritten and split out from the 1.8 version on it atm.

MRI uses rb_str_append for members and rb_str_cat2 for fixed parts of the result

@enebo @lopex Thank you for your advice. I was refactoring the code. And I was adding the test case of a Struct with utf8 symbol. Please review 1a9ef29.

@k77ch7 Since your second commit corrects flaws (duplication of cat19 logic) in the first one, can you force push this all as a single commit please?

Thanks for your help!

@headius Thanks for reviewing. I just pushed.