Sort Custom Field before display in Result List for Search by Premise Number

Hi All ,

I have added 3 custom Field in Result List ( CA, CA Status (Green,Red,Amber), Move-In-Move-out Date ).Before display on screen, its should be sorted based on Ca Status. first should be Green then yellow and Red.

Data shown in Result list should sorted by highlighted in Yellow field CA Status.

I have done code in DO_PREPARE_OUTPUT  and Get_CA_STATUS.

I need to short in DO_PREPARE_OUTPUT only using Mixed node ( value or Model ).

Please suggest me solution by which I  can sort Custom field using Mixed node ( value or Model ).

I don't want to used Event 'EH_ONSORT' .