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PO<rich:extendedDataTable> <c:forEach> Displaying a table via a "Map of maps"
 

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    <p>I have a data model with structure : <code>TreeMap &lt; String, TreeMap&lt; String, Double&gt;&gt; resultMap;</code> This is stored in a <code>SessionScoped</code> <code>ManagedBean</code>.</p> <p>I am trying to output this via a dynamic <code>&lt; rich:extendedDataTable&gt;</code> where;</p> <ul> <li>Key of first map is the row label</li> <li>Value of first map is a second map ( corresponds to the columns on the row</li> <li>Key of second map is the columns header</li> <li>Value of second map is the columns value</li> </ul> <p>Source Code:</p> <pre><code>&lt;rich:extendedDataTable value="#{queryBean.resultMap.keySet().toArray()}" var="key" frozenColumns="1" styleClass="rich-extdt"&gt; &lt;rich:column width="75px"&gt; &lt;f:facet name="header"&gt; &lt;h:outputText value="Mediation" /&gt; &lt;/f:facet&gt; &lt;h:outputText value="#{key}" /&gt; &lt;/rich:column&gt; &lt;rich:column width="75px"&gt; &lt;f:facet name="header"&gt; &lt;h:outputText value="Test" /&gt; &lt;/f:facet&gt; &lt;h:outputText value="#{queryBean.resultMap[key]}" /&gt; &lt;/rich:column&gt; &lt;c:forEach items="#{queryBean.resultMap[key]}" var="map"&gt; &lt;rich:column width="75px"&gt; &lt;f:facet name="header"&gt; &lt;h:outputText value="#{map.key}" /&gt; &lt;/f:facet&gt; &lt;h:outputText value="#{map.value}" /&gt; &lt;/rich:column&gt; &lt;/c:forEach&gt; &lt;/rich:extendedDataTable&gt; </code></pre> <p>Output:</p> <p><img src="https://i.stack.imgur.com/JtMdF.png" alt="Table output via source code"></p> <p>The first column is correctly outputting the keys of the first map. The second column (used for debugging) is correctly outputting the map structure ( when I apply <code>.keySet()</code> to the structure I do get all the correct keys ). </p> <p>Using: jstl 1.2.0, jsf 2.1 - mojarra, richfaces 4.x, tomcat 7.</p> <p><strong><em>Update:</em></strong></p> <p>As stated <a href="https://stackoverflow.com/questions/16394795/rich-datatable-can-not-use-iterate-variable-for-a-nested-loop/16396322#16396322">here</a>, the <code>&lt; c:forEach&gt;</code> has no access to the <code>&lt; rich:dataTable&gt;</code> attributes, hence unable to use <code>key</code>. Is there any simple workaround to this?</p>
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