Hi ,
the best possible way to achieve this is to create an additional column in your dataprovider and write routine to get the actual date in that column. I'm sure ABAP will have some function to convert week number to date range.
Alternatively you can use the below logic to get it.
Multiply your week number by 7 so you get 14. Now add 14 to Jan 1 that gives your Jan 14th.Now once you get this just use week() function to get the week number to cross verify if it is equal to 2 . if not subtract 7 days and use last day of the week function to get the higher limit and subtract 7 to get lower limit.
1. Var = Weeknumber*7
2. Var2 = relativedate("01/01/2015";Var ) here 01/01/2015 can be a variable instead to get you the first day of current year
3. Var3 = week([Var2])
4. Var4 = if ( [Var3] = weeknumber) then [Var2] else relativedate([Var2],-7)
5. Var5 = lastdayofweek([Var4]) .... upper limit
6. Var6 = relativedate([Var5];-7) .... lower limit
Now in your table you can concatenate Var 5 and Var 6 to get output as jan 5 2015 to jan 11 2015
Let me know how this works
-Tanveer.