JSLT and apache MultiKey Map

[Carl Jenkins]

I know in JSTL we can iterate over lists and maps, but is there a way to do the same for MultiKey maps?

[Sebastian Janisch]

You mean if the value of your map is another map or list ?

In that case just use another JSTL for each loop passing in the value of the current iteration of you root map.

[Christophe Verré]

If you are talking about org.apache.commons.collections.map.MultiKeyMap, yes you can iterate over it with c:forEach, because it implements IterableMap, which is a subinterface of Map.

[Vikas Kapoor]

you need to prepare MultiKeyMap with MultiKey as a key. and to access it in jsp through JSTL/EL

I passed MultiKeyMap and Map(HashMap)<key(String in my case,Object of MultiKey)>

so it would be something like,

${MultiKeyMap[HashMap['MyKey']]}

Christophe,
Initially I tried the same as I also thought it's same as any other map. But it accepts MultiKey as a key so I went for above approach. I don't know how can I use it as any other map.

[Christophe Verré]

The poster is asking about iterating it. So :

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
	
<%
	org.apache.commons.collections.keyvalue.MultiKey key = new org.apache.commons.collections.keyvalue.MultiKey("a","b");
	org.apache.commons.collections.map.MultiKeyMap map = new org.apache.commons.collections.map.MultiKeyMap();
	map.put(key, "one");
	key = new org.apache.commons.collections.keyvalue.MultiKey("c","d");
	map.put(key, "two");
	request.setAttribute("map", map);
%>

<c:forEach var="outvar" items="${map}">
	${outvar}<br>
	${outvar.key}<br>
	${outvar.value}<br>
	<hr>
</c:forEach>