Question

How can I get rid of the empty space by components not rendered via rendered attribute?

I want to display a list of objects in a dataTable and sort them by a property they have. I do it likes this:
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<t:dataTable value="#{someBean.values}" var="value">  
    <h:column>  
        <f:facet name="header">  
            <t:outputText value="X" />  
        </f:facet>  
        <h:panelGroup rendered="#{value.property eq 'X'}">  
          <!-- some stuff -->  
        </h:panelGroup>  
    </h:column>  
    <h:column>  
        <f:facet name="header">  
            <t:outputText value="Y" />  
        </f:facet>  
        <h:panelGroup rendered="#{value.property eq 'Y'}">  
          <!-- some stuff -->  
        </h:panelGroup>  
    </h:column>                 
</t:dataTable>  

It will display one item every row only, because of the rendered thingy. How can I avoid this? I stumpled upon this also on other occasions…

Thank you!

Answer 1

Use a single column and render in there.

<t:dataTable value="#{someBean.values}" var="value">  
    <h:column>  
        <f:facet name="header">  
            <t:outputText value="#{value.property}" />  
        </f:facet>  
        <h:panelGroup rendered="#{value.property eq 'X'}">  
          <!-- some stuff -->  
        </h:panelGroup>  
        <h:panelGroup rendered="#{value.property eq 'Y'}">  
          <!-- some stuff -->  
        </h:panelGroup>  
    </h:column>                 
</t:dataTable>