Layout controller java class file

Hi all
I want to edit a layout controller java class file.
When I click on edit button, it shows me the path of the layout controller java class file.
Anybody can tell me the location from where I can download this java file.
I have followed this thread discussion, please refer following link:
https://forums.sdn.sap.com/thread.jspa?threadID=83494
Regards
Kapil

Hi Romano and Robert
The concept of 'hot deployment' is still a bit unclear to me in terms of implementation. I followed the links provided by you but they explained theory and no steps to implement it.
I however followed this blog link : http://www.sdn.sap.com/irj/scn/weblogs?blog=/pub/wlg/5800
"Flexible UI component development demystified" by Thilo.
I downloaded his sample project : https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/webcontent/uuid/3091fdd3-a999-2910-f18f-eae1386d2ae0
I imported it in my studio, replaced appropriate jar files to get it in rebuildable state and then deployed it on portal.
After deployement and restarting the server, I created and applied the new layout controller to the layout set of KM iview.
This time however a blank KM page was displayed.
I checked the deploy messages in NWDS, it showed me following warning and info messages:
1. com.sap.portal.plugins.config-archiver: Config archive successfully created (time to export 578 ms)
2. com.sap.portal.plugins.config-archiver: Invalid structure (missing /FlexibleUIComponents/src.config/install/meta/expanded folder)
3. com.sap.portal.plugins.config-archiver: No privateArchive.properties file is defined.
Please note, I have not modified anything in the downloaded sample project, just fixed it with required jar files picked up from the server directories.
I am using SP15 NWDS and EP server is 7.00SP16.
As a beginner, I just want to first get this downloaded sample project implementation correct.
Please let me know corrections/pointers for this. It would be highly appreciated.
Thanks
Kapil.

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Layout controller java class file

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