Sorting and querying documents in couchbase-lite

Mobile Couchbase Lite
1

What I want to do is finding all records that match some id and sorted by a name. The data looks something like:

{
    type:"receiving",
    saleName:"Harshitha",
    penId:"7aac88118420858d62f5ea55e22"
}
{
    type:"receiving",
    saleName:"Tom",
    penId:"81fb1a79526f4e2bdc77aa7d73d"
}
{
    type:"receiving",
    saleName:"James",
    penId:"81fb1a79526f4e2bdc77aa7d73d"
}

I want to get documents with some specific penID sorted by saleName.
Ex:- I want to get documents with this penId ‘81fb1a79526f4e2bdc77aa7d73d’ and sort them by saleName. Like this order:-

{
    type:"receiving",
    saleName:"James",
    penId:"81fb1a79526f4e2bdc77aa7d73d"
}
{
    type:"receiving",
    saleName:"Tom",
    penId:"81fb1a79526f4e2bdc77aa7d73d"
}

My view like this,

      View view = database.getView("receiving_view");
      if (view.getMap() == null) {
          view.setMap(new Mapper() {
              @Override
              public void map(Map<String, Object> document, Emitter emitter) {
                  if (document.get("type").equals("receiving") ) {

                      List<Object> keys = new ArrayList<Object>();
                      keys.add(document.get("penId"));
                      keys.add(document.get("saleName"));

                      emitter.emit(keys, document);
                  }
              }
          }, "1.1");
      }
      return view;

Then I tried to get data like this,

    View view = getView("receiving_view");
    Query query = view.createQuery();

    List<Object> keys = new ArrayList<Object>();
    keys.add("81fb1a79526f4e2bdc77aa7d73d");

    List<Object> allKeys = new ArrayList<Object>();
    allKeys.add(keys);
    query.setKeys(allKeys);
    query.run();

It’s not working because I passed one key, but their are two keys in the view… But I can’t pass the ‘saleName’ as a key because I want only to sort by ‘saleName’. What is the best way to do this?