I have a requirement to retrieve and update data from a collection in oracle package runtime. These fields are not stored anywhere in database.

For e.g. 

I have a datawindow with columns (say id , name , address)

I want to display values into this datawindow from output of the oracle package procedure, something like below

procedure get_data(argument in number, datawindow_data out <collection>) 

Also for updating I would like to call a package procedure sending all the data from datawindow to run updates on a third party system.