Extending Controller for a std OAF page

Question

Hi,
I have a requirment to extend the CO of a std OAF page.
The requirement is,On click of a submit button (Apply) invoke a custom method before the std code gets executed
To achieve the same I will use personalization and extend the standard CO and override PFR as follows
CustomCO extends StdCO
public void PR()
super.PR(); ----do I need to invoke super here?
public void PFR()
super.PFR();-----------A
if( Apply button clicked)
invoke custom code()
super.PFR(); -----------B
My question is
1) Can i copy the part std CO code(using decompiler) in my custom CO (i guess not a good practice)
2) Instead of 1) above can i invoke super as shown in B(in the code above)?
3) If i invoke super after my custom code in the if loop can I remove super pointed as A (in the code above)? Will it harm the std functionality?
Thanks,
kamath.

Answer 1

I agree with you, Tapash .... there might be a few cases where you might want to call seeded code first. But, the point I wanted to stress is for a submitButton, mostly the seeded controller will redirect to currentpage or any other page (depending on logic) in its code. So if you are extending the functionality of it, it becomes necessary to call ur custom code first. If you still want the seeded code to be executed first, then you might have to decompile the class file, paste the complete code in custom controller and insert your custom logic whereever you feel is appropriate.
And Senthil's suggestion also shows calling super method after custom code ... so we are all on same page :-)