ObservableSet/Map as items for List/TableView

Question

In quite a few cases I have a model in which underlying data has no inherent sorting - it comes as an unordered set of items. They might be added/removed/updated at random time. I would like to use Set<MyItem> or Map<Key,MyItem> and let the sorting 'sort out' the ordering, but it seems that it is not possible - all controls expect ObservableList and SortedList can be created only on top of other ObservableList.
My current workaround is to just use ObservableList as a base model and do O(n) operations for removals, but I feel wrong about having strongly-ordered collection with random order as a base.
Is there any way to create ObservableList which would present Set/Map.values+provided sorting?

Answer 1

Figured it out ...was too obvious ....perhaps there is a cleaner way ...
<logic:iterate id="thisuserpolicy" name="vps" scope="request" type=VerdictsPoliciesBean" >
<% String key = (String)thisuserpolicy.getVerdictName();
String mapprop = "uservalues(" + key + ")";
String [] possiblePolicies = (String [])thisuserpolicy.getPossiblePolicies();
%>
<tr >
<td >
<bean:write name="thisuserpolicy" property="verdictName" /></td>
<td>
<html:select name="antiSpamForm" property="<%= mapprop %>">
<%
String thisPolicy="";
for ( int i = 0; i < possiblePolicies.length; i++ ) {
thisPolicy = possiblePolicies;
%>
<html:option value="<%=thisPolicy%>"/>
<%
%>
</html:select>
</td>
</tr>
</logic:iterate>