Showing links conditionally

Question

Hi
I am trying to show a link based on certain condition. If condition fails I wish to show it as a label if not show it using h:command_link.
I am using <c:choose jstl tags right now, which shows up fine. Is there a JSF way to do this?
<c:choose>
<c:when test="${MyBean.canGoPrev}">
<h:command_link actionListener="#{MyBean.gotoPrev}">
     <h:output_text value="Previous"/>
</h:command_link>
</c:when>
<c:otherwise> <h:output_text value="Previous"/> </c:otherwise>
</c:choose>
The links display as desired. But the problem is ... I have my actionListener method as below:
public void gotoPrev(ActionEvent event)
data.Prev();
UIComponent comp = event.getComponent().findComponent ("DataList");
((ValueHolder)comp).setValue(objSet.getDataList());
And when I select the link, I get .... ERROR : Duplicate id _089 found...
Any suggestions...?
Thanks

Answer 1

Assign a unique ID to each component when you use conditional tags... You can do something as such:
<c:choose>
<c:when test="${MyBean.canGoPrev}">
<h:command_link id="uniqueID1" actionListener="#{MyBean.gotoPrev}">
<h:output_text id="uniqueID2" value="Previous"/>
</h:command_link>
</c:when>
<c:otherwise> <h:output_text id="uniqueID3" value="Previous"/> </c:otherwise>
</c:choose>