get and set rating with JavaScript

I am trying to get and set the rating (stars) of JPEG and RAW data with JavaScript, but I cannot find an interface to do this.

I already get the file name and other information. Is there any techniques?

#target bridge

var selectedItems = app.document.selections;
var currentFolder = null;
if (selectedItems.length > 0) {
    currentFolder = selectedItems[0].parent.path;
} else {
    currentFolder = "~/Pictures";
}

var d = Folder.selectDialog("select folder", currentFolder);
var f = d.getFiles();

for(var i = 0; i < f.length; i++){
    alert(f[i].name, f[i].rating); // rating is undefined
}