Re: Need help with layered Map iteration in JSP

[Erik Weber]

How can I refer to the index of the current iteration with c:forEach 
(analogous to the indexId attribute to logic:iterate)?

Thanks,
Erik
Kris Schneider wrote:
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core"; %>
<c:forEach var="entry" items="${map}">
 <%-- ${entry.key} is the current key --%>
 <%-- ${entry.value} is the associated bean array --%>
 <c:forEach var="bean" items="${entry.value}">
   ...
 </c:forEach>
</c:forEach>
Quoting Erik Weber <[EMAIL PROTECTED]>:
 

I could use some Struts-EL/JSTL tag help, please.
I have a Map with each entry having a String as the key and a bean array 
as the value.

I need two iterations, one nested inside the other.
For the outer iteration, I want to iterate the keySet of the Map. I 
don't know what the keys are going to be or how many there will be.

Within that iteration, for each key in the keySet, I need to iterate 
over the buckets of the array that is the value for that key.

To make this more clear, let's say I will produce a table of tables, 
somewhat like this:

<table>
 <!-- start outer iteration here; iterate over the keySet of the Map -->
 <!-- Map key #0 -->
 <tr>
   <td>
     <table>
       <!-- start inner iteration #1 here; iterate over the Object[] that is
the value for key #1 in the Map -->
       <!-- Object[bucket #0] -->
       <tr>
         <td><!-- Object[bucket #0].property A --></td>
         <td><!-- Object[bucket #0].property B --></td>
       </tr>
       <!-- end Object[bucket #0] -->
       <!-- Object[bucket #1] -->
       <tr>
         <td><!-- Object[bucket #1].property A --></td>
         <td><!-- Object[bucket #1].property B --></td>
       </tr>
       <!-- end Object[bucket #1] -->
     </table>
   </td>
 </tr>
 <!-- end Map key #0 -->
 <!-- Map key #1 -->
 <tr>
   <td>
     <table>
       <!-- start inner iteration #2 here; iterate over the Object[] that is
the value for key #2 in the Map -->
       <!-- Object[bucket #0] -->
       <tr>
         <td><!-- Object[bucket #0].property A --></td>
         <td><!-- Object[bucket #0].property B --></td>
       </tr>
       <!-- end Object[bucket #0] -->
       <!-- Object[bucket #1] -->
       <tr>
         <td><!-- Object[bucket #1].property A --></td>
         <td><!-- Object[bucket #1].property B --></td>
       </tr>
       <!-- end Object[bucket #1] -->
     </table>
   </td>
 </tr>
 <!-- end Map key #1 -->
 <!-- end outer iteration -->
</table>
Could someone show me some skeleton JSTL or Struts-el code?
I would appreciate it very much,
Erik
   

 

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