How to dynamically create params for Cewolf ChartProcessor ?

Question

Hi folks,

I have an issue trying to create a pie chart in my JSP. I am using Cewolf (and Jfreechart). My code is the following :

<cewolf:chartpostprocessor id="pieChartPP">
<c:forEach items="${requestScope.statsClientGlobal}" var="statClient">
<cewolf:param name="${statClient.siteName}"value="${requestScope.colorMap[statClient.siteCode]}"/>
</c:forEach>
</cewolf:chartpostprocessor>
</cewolf:chart>

As you can see I would like to dynamically create the cewolf param line but I get this error:

Error 500: org.apache.taglibs.standard.tag.rt.core.ForEachTag
incompatible with de.laures.cewolf.taglib.tags.Parameterized.

Any idea how I could make it work ?