JSTL - total count for loop within a loop

[Garret O'Keeffe]

Hi - here is my dilema,
I need to display items in a html table from a Map using JSTL. Every odd table row should have a grey colour and every even should be white (so it looks nice).
My data is nested in HashMaps. The first map provies a key to the second map. However the second map may have differnt sizes for its different keys.
I want to display all the data from the second map for all the data in the first. At the moment I am testing for odd/even by checking if the count % 2 = 0 for the first map but because of the varying length of the second map however this is wrong. I need some means of getting the total index and then I can use the module against this.

My constrains are; I can't change the way the maps are and I cannot use scriptlets. How can I do this using JSTL?

Here is a snippet of my current code, I have commented the bad test:-

Any help would be greatly appreciated as I know this is possible but its baffling me

 
<table >   
 	<c:forEach items="${prereqsMap}" var="pSysReqMapEntry" varStatus="counter">									
 		<c:if test="${counter.count == 1}">
 			<tr class="title">
 				<th class="title">Select</th>
 				<th class="title">Grouping</th>
 				<th class="title">ID</th>
 			</tr>
 		</c:if>
 			<c:forEach items="${pSysReqMapEntry.value}" var="pSysReqValueEntry" varStatus="productListCount">				
 				<c:choose>
 					<c:when test="${(productListCount.count + counter.count) % 2 == 0}"> <!- this wrong, this needs to be fixed ->
 						<tr class="even">
 					</c:when>
 					<c:otherwise>
 						<tr class="odd">
 					</c:otherwise>
 				</c:choose>
 				
 				<td><input type="checkbox" name="sysreq_record_prereq" value="${pSysReqValueEntry.productId}"/></td>
 				<td class="ch_col"> 
 					<c:choose>
 						<c:when test="${productListCount.count == 1}">
 							${pSysReqMapEntry.key}
 						</c:when>
 						<c:otherwise></c:otherwise>
 					</c:choose>
 				</td>
 				<td class="ch_col"> 
 					${pSysReqValueEntry.recordID}
 				</td>
 		</tr>
 		</c:forEach>
 	</c:forEach>
 	</table>

[Anirvan Majumdar]

Before you start iterating over - ${pSysReqMapEntry.value} - initialise a temporary variable -

   
<c:set name="classStr" value="even"/>

Once you start the iteration of ${pSysReqMapEntry.value}, simply test and flip the value of this variable -

   
<c:choose>
   <c:when test="${classStr == 'even'}">
      <c:set name="classStr" value="odd"/>
   </c:when>
   <c:otherwise>
      <c:set name="classStr" value="even"/>
   </c:otherwise>
</c:choose>
<tr class="${classStr}">

Hope this helps!

[Sri Karr]

Please use the variable "counter" to iterate over the inner c:forEach loop and use that to find out even and odd rows.

<table>

   <c:set var="counter" value="0" />
    <c:forEach iterms=${prep...............
      
           ................
        
      <c:forEach items="${pSysReqMapEntry.value}" var="pSysReqValueEntry" varStatus="productListCount">                
                <c:choose>   
                    <c:when test="${(counter + productListCount.count) % 2 == 0}"> <!- this wrong, this needs to be fixed ->   
                        <tr class="even">   
                    </c:when>   
                    <c:otherwise>   
                        <tr class="odd">   
                    </c:otherwise>   
                </c:choose>   
                   
                <td><input type="checkbox" name="sysreq_record_prereq" value="${pSysReqValueEntry.productId}"/></td>   
                <td class="ch_col">    
                    <c:choose>   
                        <c:when test="${productListCount.count == 1}">   
                            ${pSysReqMapEntry.key}   
                        </c:when>   
                        <c:otherwise></c:otherwise>   
                    </c:choose>   
                </td>   
                <td class="ch_col">    
                    ${pSysReqValueEntry.recordID}   
                </td>   
        </tr>
        <c:set var="counter" value="${counter+1}" />   
        </c:forEach>    

</c:forEach>
</table>
[/code]

[Bear Bibeault]

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[Garret O'Keeffe]

Cool - That works great and nice & clean too. Tha