How to bind value to variables of objects which are present in a list

Question

I have a FormObject that contains a list of objects.

I want to bind value to variables of objects which are in list.

---

class Form{
 List<QualityCheck> quality;
 //setter and getters..
}

class QulaityCheck{
   GreetingStandard greetingStandard;
   ..
//setter and getters..
}

 class GreetingStandard{
  int opening;
  ..
 //setter and getters..}

---

I have tried this:

<s:textfield name="form.quality[%{#rowStatus.index}].greetingStandard.opening"/>