Spring 3 + Freemarker binding issue

[SaratKumarM]

I am facing a problem with <@spring bind ... /> macro in FTL .

Question 1 : is <@spring bind .. /> macro adhere to Java 5 features ?

Let me explain my issue :
My Domain Objects:

class ParentRecord{

private String rawData;

//getters & setters ..
}


class ARecord extends ParentRecord{

String orginalValue;

//getters & setters ..

}

class BRecord extends ParentRecord{

String previousValue;

//getters & setters ..

}

My Model Attribute:

class JobRecords{

List<? extends ParentRecord> list= new ArrayList<ParentRecord>();
//getters & setters ..

}

Controller:

@RequestMapping(value = "/jobs/pre/{jobName}", method = RequestMethod.POST)
	public String launch(ModelMap model@ModelAttribute("jobRecords") JobRecords jobRecords,Errors errors,..){
...
jobRecords.setList(records);
...

In the above method based on the jobName , corresponding list of objects will be added (i.e List of ARecord or BRecord) .

From the FTL , I am able to access the model attriubtes values.

..
<@spring.bind "jobRecords.list[${content_index}].originalvalue" />			<td><input type="text"							name="${spring.status.expression}"							value="${spring.status.value?default("")}"  /></td>
..

when I post the form , it unable to dynamic object (ARecord) contents .I can figure out that Spring bind macro has only intialized List of ParentRecords not list of Arecord objects will submission .

Can any one help me in resolving this issue

[SaratKumarM]

Any One help me