Conditional logic in JSF

[Kalyan Anand]

I have the following code in JSF which displays a Settings URL . The URL needs to be hiiden when the parameter is null.

I was thinking about the best approach to do it. The obvious and easitest approach I see is using JSP <c:if>. Any thoughts on how this can be pertformed with other mechanisms and which one is considered better appproach ?

	
  <h:commandLink styleClass="xxxx" id="xxxx" action="#{xxxx}">
      <h:outputFormat id="xxxx" value="Settings of {0}">
         <f:param name="xxxx" value="#{test.parameter}"></f:param>
     </h:outputFormat>
   </h:commandLink>

[Kalyan Anand]

Any answers on this one ???

[Rodrigo Lazoti]

You're can use the rendered attribute. Example:

<h:commandLink styleClass="xxxx" id="xxxx" action="#{xxxx}" rendered="#{test.parameter ne null}">
  <h:outputFormat id="xxxx" value="Settings of {0}">  
    <f:param name="xxxx" value="#{test.parameter}"></f:param>  
  </h:outputFormat>  
</h:commandLink>

[Tim Holloway]

Just to be pedantic (or was that pædantic?), conditional logic (meaning business logic or wholesale rearrangement of view components) is something that you should not place in a View. It's a violation of the MVC separation of concerns.

Conditional rendering, on the other hand, is another matter.