Session Problems: "Don't know how to iterate over supplied "items""

Question

Hi, I am developing my first application using Struts and JSP. The Action Form loads an object called reportGrid into session and I am trying to display it on a JSP page. Displaying simple variables works fine, but I can display an object. The error I receive is: Don't know how to iterate over supplied "items"
My object is made up of a group of ArrayLists looks similar to this this:
        private List affiliateID;
     private List affiliateName;
     private List product1;
     private List product2;
     //etc for about 10 listsThe object is filled with data from a result set and placed into session like:
     HttpSession session = request.getSession();
     session.setAttribute("grid", reportGrid);The goal is to display each list in its own column in a HTML table.
<table>
<tr>
<c:forEach var="affiliateName" items="${grid}">
          <td>
               <c:out value="${affiliateName}" />
          </td>     
     </c:forEach>
     <c:forEach var="product1" items="${grid}">
          <td>
               <c:out value="${product1}" />
          </td>     
     </c:forEach>
     <c:forEach var="product2" items="${grid}">
          <td>
               <c:out value="${product2}" />
          </td>     
     </c:forEach>
</tr>
</table>I'm sure this has been asked before but I could not find any examples in the forums. I can place an ArrayList directly into session and iterate through using <c:forEach tags but when I try to do the same with an object it gives me the error " Don't know how to iterate over supplied "items" ".
Does anyone have any examples of pulling and displaying an object in session which contains ArrayLists? I have been stuck on this same error for a while and any help will be greatly apreciated.
James.          

Answer 1

What is the type of grid?