Java Iterator backed by a ResultSet

Question

I\'ve got a class that implements Iterator with a ResultSet as a data member. Essentially the class looks like this:

public class A implements Iterator{
            


        

Answer 1

Do you expect most of the data in your result set to actually be used? If so, pre-cache it. It's quite trivial using eg Spring

  List> rows = jdbcTemplate.queryForList(sql);
  return rows.iterator();

Adjust to suit your taste.