Difference between setOrder and setOrderColumn in Seam

Difference between setOrder and setOrderColumn in Seam

 

1. This code work fine.
   

programList.setOrder("program.programName asc, program.programId desc");

1. The below code snippet won't work –
   
   1. programList.setOrderColumn("program.programName asc, program.programId desc");
      
   2. programList.setOrderColumn("program.programName asc);
      

      It throws the following exceptions - Caused by java.lang.IllegalArgumentException with message: "invalid order column ("program.programName asc, program.programId desc" must match the regular expression "^\w+(\.\w+)*$")"
      

   3. This works fine - programList.setOrderColumn("program.programName");
      
      1. But we have to set
         

         customerList.setOrderDirection("asc"); or customerList.setOrderDirection("desc");