I have two portlet p_01 and p_02 .
when use click on the page (contains p_01 & p_02 portlet) only the p_01 portlet must be visible , Once user fills the correct data and submit
p_02 should be visible based on some condition / value on input data .
I do think you could somehow combinate using Portlet features like IPC, Public Render Parameters, Window State and Portlet Mode to make it work. In there :
+ IPC, Public Render Parameter can be used to share information between portlet
+ Window State/Portlet Mode for controlling the visibility
Retrieving data ...