Checking which fields were modified by the user

Question

Hi
I could not find an answer for this in this forum. I have an Apex 3 page with a few fields, and after the page is submitted, in a post-submit PL/SQL process, I need to know what fields were modified by the user.
I know that I can save the original field values in hidden fields, but this is cumbersome especially if there is a big number of fields. Is there a built-in functionality to do this?
Thanks
Luis

Answer 1

Thanks Timo.
I am using ADF Data Control (which are created from Web Service proxy) to display/update the data.
In the backing bean, the operation that is invoked at the time persisting data is as follows:
public void commitOperation {
BindingContainer bindings = getBindings();
OperationBinding operationBinding = bindings.getOperationBinding("operationA");
DCIteratorBinding dciter = (DCIteratorBinding)bindings.get("someIterator");
for(int i=0; i<dciter.getViewObject().getEstimatedRowCount(); i++)
Row row=dciter.getRowAtRangeIndex(i);
SomeObject someObject= new SomeObject ();
someObject.setAttr1(row.getAttribute("Attrbute1").toString());
someObject.setAttr2(row.getAttribute("Attribute2").toString());
objectList.add(someObject);
operationBinding.getParamsMap().put("param1", objectList);
ResultObject result = (ResultObject) operationBinding.execute();
Inside the for loop (or any other place in the backing bean), I would like to figure out if the row was modified by the user. Please let me know if how to get that. If ADF provides this automatically, that would be GREAT.
Thanks,
Ash K