Efficient EnumSet + List
<p>Someone knows a nice solution for <a href="http://java.sun.com/j2se/1.5.0/docs/api/java/util/EnumSet.html" rel="nofollow">EnumSet</a> + List</p>

<p>I mean I need to store enum values and I also need to preserve the order , and to be able to access its index of the enum value in the collection in O(1) time.</p>
