I have made a change to the expression API for Conjunction (List of expressions added with AND) and Disjunction (List of expression added with OR).

List<Customer> list = server.find(Customer.class)
        .where().disjunction()
                    .startsWith("name", "r")
                    .eq("anniversary", onAfter)
                    .eq("status", Customer.Status.ACTIVE)
                    .endJunction()
        .where().gt("id", 20)
        .order().asc("name")
        .findList();

Junction extends ExpressionList so you can simply add a bunch of expressions after the conjunction() or disjunction().

Use endJunction() to take you back to the 'parent' expression list or use where() to take you to the 'root' level expression list (WHERE clause).