title: p:column instead c:foreach on datatable primefaces cannot show result
body: <p>i have a problem with p:column instead c:foreach
  when i show size of list in p:column value found
  but when i used p:column instead c:foreach result is empty</p>
  
  <pre><code>&lt;h:form id="frmDataTable"&gt;
          &lt;p:dataTable widgetVar="widgetVarCrudDataTable" var="list"
               id="dataTable"
              value="#{workshiftListBean.listWorkshiftRqDtl}"
              emptyMessage="No record found"&gt;
              &lt;p:columnGroup type="header"&gt;
                  &lt;p:row&gt;
                      &lt;c:forEach items="#{workshiftListBean.listVoHeader}"
                          var="listHeader"&gt;
                          &lt;p:column headerText="#{listHeader.headerDays}"
                              styleClass="#{listHeader.weekendStyle}" /&gt;
                      &lt;/c:forEach&gt;
                  &lt;/p:row&gt;
                  &lt;p:row&gt;
                      &lt;c:forEach items="#{workshiftListBean.listVoHeader}"
                          var="listHeader"&gt;
                          &lt;p:column headerText="#{listHeader.headerDates}"
                              styleClass="#{listHeader.weekendStyle}" /&gt;
                      &lt;/c:forEach&gt;
                  &lt;/p:row&gt;
              &lt;/p:columnGroup&gt;
  
  
              &lt;!--size found --&gt;
              &lt;p:column&gt;
                      #{list.listVoShift.size()}
              &lt;/p:column&gt;
  
              &lt;!-- but when i used c:foreach this result is empty --&gt;
              &lt;c:forEach items="#{list.listVoShift}" var="shift"&gt;
                  &lt;p:column&gt;
                      &lt;p:inputText value="#{shift.property}" /&gt;
                  &lt;/p:column&gt;
              &lt;/c:forEach&gt;
  </code></pre>
  
  <p>my code problem in :
           
                  
                          #{list.listVoShift.size()}
                  </p>
  
  <pre><code>            &lt;!-- but when i used c:foreach this result is empty --&gt;
              &lt;c:forEach items="#{list.listVoShift}" var="shift"&gt;
                  &lt;p:column&gt;
                      &lt;p:inputText value="#{shift.property}" /&gt;
                  &lt;/p:column&gt;
              &lt;/c:forEach&gt;
  </code></pre>