iProcurement Extension For Projects List of Values

Hello,

How to do an extension in iprocurement page the project list of values should be based on the type of requisition?

is it possible to get the RequisitionHeaderId using the below in my custom controller class?

java.util.Dictionary dictionary = oapagecontext.getLovCriteriaItems();

        Number number = getLovItemNumber(oapagecontext, dictionary, "RequisitionHeaderId");