在JSF中使用JSTL函数

Question

i want to use the JSTL function contains in JSF2 here's what i tried but the condition always evaluates to false, i think i am missing something:

<c:forEach items="#{myBean.toSendCheckBoxes}" var="entry" varStatus="loop">                             

               <input type="checkbox" name="myArray" value="#{entry.value}" />

               <c:choose>

                 <c:when test="#{fn:contains(entry.key,'g')}">
                   <ice:graphicImage url="/resources/images/image1.bmp" />
                   <b>#{entry.key}</b>                      
                 </c:when>

                 <c:otherwise>
                   <ice:graphicImage url="/resources/images/image2.bmp" />
                   <span>#{entry.key}</span>
                 </c:otherwise>



               </c:choose>

            </c:forEach>

if there's another JSF way to accomplish that, would be very nice to mention it, thanks in advance.

Answer 1

More JSFish way to do it would be

<ui:repeat value="#{myBean.toSendCheckBoxes}" var="entry" varStatus="loop">                             

  <input type="checkbox" name="myArray" value="#{entry.value}" />

  <ui:fragment rendered="#{fn:contains(entry.key,'g')}">
    <ice:graphicImage url="/resources/images/image1.bmp" />
    <b>#{entry.key}</b>                      
  </ui:fragment>

  <ui:fragment rendered="#{!fn:contains(entry.key,'g')}">
    <ice:graphicImage url="/resources/images/image2.bmp" />
    <span>#{entry.key}</span>
  </ui:fragment>

</ui:repeat>

or even

<ui:repeat value="#{myBean.toSendCheckBoxes}" var="entry" varStatus="loop">                             

  <input type="checkbox" name="myArray" value="#{entry.value}" />

  <ice:graphicImage url="#{fn:contains(entry.key,'g') ? '/resources/images/image1.bmp' : '/resources/images/image2.bmp'}" />
  <span class="#{fn:contains(entry.key,'g') ? 'bold-style' : ''}">#{entry.key}</span>
</ui:repeat>

but I would expect your condition to evaluate properly nevertheless.

Answer 2

I use t:dataList (myfaces tomahawk xmlns:t="http://myfaces.apache.org/tomahawk" ) for looping over elements to have correct identifier generation and rendered attribute for different displaying of elements in the list.

<t:dataList layout="simple" value="#{myBean.toSendCheckBoxes}" var="entry">                             
    <input type="checkbox" name="myArray" value="#{entry.value}" />
        <h:panelGroup rendered="#{fn:contains(entry.key,'g')}">
            <ice:graphicImage url="/resources/images/image1.bmp" />
            <b>#{entry.key}</b>                      
        </h:panelGroup>
        <h:panelGroup rendered="#{not fn:contains(entry.key,'g')}">
            <ice:graphicImage url="/resources/images/image2.bmp" />
            <span>#{entry.key}</span>
        </h:panelGroup>
</t:dataList>

I've had issues with dynamic element rendering (show/hide rows) within ui:repeat , so I had to use t:dataList instead.