Alternative to ui:fragment in JSF

by

Since ui:fragment doesn’t support rendered most of IDE (like Netbeans mark it as error BUT it works because in JSF parameters are inherited)

This is actually a bug in JSF 2.0 Facelets tag file declaration (in Mojarra, that’s the com/sun/faces/metadata/taglib/ui.taglib.xml file). The rendered attribute is overlooked and missing in the tag file declaration (and also in the JSF 2.0 <ui:fragment> tag documentation), while it is really present in the UIComponent. The IDE validation is based on the tag file declarations and hence it gives a misleading validation error. This issue is fixed in JSF 2.1, the missing attribute is added to the tag file declaration (and also in the JSF 2.1 <ui:fragment> tag documentation).

If either just ignoring the IDE warnings or upgrading to JSF 2.1 is not an option, then you can consider using the <h:panelGroup> component instead:

<h:panelGroup rendered="#{condition}">
   <h:outputText value="text 1"/>
   <h:outputText value="text 2"/>
   <h:outputText value="text 3"/>
</h:panelGroup>

It outputs nothing anyway if you don’t specify the id, style, styleClass and like attributes, else a simple <span> will be rendered.

If all what you have is plain vanilla HTML (i.e. no JSF components), then you can also consider using <f:verbatim>.

<f:verbatim rendered="#{condition}">
   text 1
   text 2
   text 3
</f:verbatim>

However, the <f:verbatim> is deprecated in JSF 2.0 (which in turn has also a documentary bug by the way, the JSF 2.0 <f:verbatim> tag documentation does not mention deprecation, but the JSF 2.1 <f:verbatim> tag documentation does).

More Related Contents:

  1. What is the difference between JSF, Servlet and JSP?
  2. What components are MVC in JSF MVC framework?
  3. Recommended JSF 2.0 CRUD frameworks [closed]
  4. Can I update a JSF component from a JSF backing bean method?
  5. Making Distinctions Between Different Kinds of JSF Managed-Beans
  6. Execute managebean method from javascript onload event
  7. Understanding JSF as a MVC framework
  8. Spring session-scoped beans (controllers) and references to services, in terms of serialization
  9. How to invalidate an user session when he logs twice with the same credentials
  10. Forcing a save as dialogue from any web browser from JSF application [duplicate]
  11. How to implement a possibility for user to post some html-formatted data in a safe way?
  12. JSF backing bean structure (best practices)
  13. Java EE 6 vs. Spring 3 stack [closed]
  14. JSF backing bean should be serializable?
  15. Get current page programmatically
  16. Field.get(obj) returns all nulls on injected CDI managed beans, while manually invoking getters return correct values
  17. Difference between returning null and “” from a JSF action
  18. What is the relationship between component family, component type and renderer type?
  19. JSF 2: How show different ajax status in same input?
  20. How can I show/hide component with JSF?
  21. Invoke method just before session expires
  22. what is none scope bean and when to use it?
  23. Generic JSF entity converter [duplicate]
  24. Is there a way to run a JSF page without building the whole project?
  25. Prevent suffix from being added to resources when page loads
  26. Where is Visual Web Editor for JavaServer Faces on Netbeans
  27. Injecting a Spring bean using CDI @Inject
  28. JSF tags not rendered [duplicate]
  29. Recursion in JSF (c:forEach vs. ui:repeat)
  30. How to use DTO in JSF + Spring + Hibernate

Leave a Comment