GWT + CSS + JSON

I'm not very happy with my previous solution - I mean that I call one, named JavaScript function for modifying style for the row.
In this example it does not matter but assume that we have a lot of views and every view requires different row modifier. Calling one JavaScript function for all view is not a good idea.
So I decided to introduce "dynamic" JavaScript function - the name of JavaScript function is taken from resource  and can vary.
So instead of:

 private class AddStyle implements RowStyles<EmployeeRecord> { 
 
        @Override 
        public String getStyleNames(EmployeeRecord row, int rowIndex) { 

            ....
            String jsString = js.createJsonString();

            return jsAddStyle(parseJson(jsString)); 
        } 
    } 


 public static native String jsAddStyle(JavaScriptObject o) /*-{
                return $wnd.jsAddStyle(o);
    }-*/;

The following code was introduced (code).

 private class AddStyle implements RowStyles<EmployeeRecord> { 
          private final String jsString;  
        @Override 
        public String getStyleNames(EmployeeRecord row, int rowIndex) { 





            String jsString = js.createJsonString(); 

            return callJsStringFun(jsFun, jsString);
        } 
 
    } ....    




 public static native String callJsStringFun(String jsonFun, String paramS) /*-{
                return $wnd.eval(jsonFun + '(\'' + paramS + '\')');
    }-*/;   

JavaScript function should follow the pattern. Of course - in this example jsString (as above) should be equal to 'jsAddStyle'.

function jsAddStyle(s) { 
          var o = eval('(' + s + ')'); 
          var job = o.Employee.job; 
          if (job == 'MANAGER') { return 'addRow'; } 
             return null; 
        }

So this way every view could have its own customized function identified by name.