public String rolesToYml ( Collection < Role > roles ) { try { Map < String , Role > map = new TreeMap <> ( ) ; roles . forEach ( role -> map . put ( role . getKey ( ) , role ) ) ; return mapper . writeValueAsString ( map ) ; } catch ( Exception e ) { log . error ( "Failed to create roles YML file from collection, error: {}" , e . getMessage ( ) , e ) ; } return null ; }
Convert roles collection to yml string .