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http://issues.apache.org/jira/browse/MYFACES-453?page=comments#action_12330629 
] 

Rob Raymond commented on MYFACES-453:
-------------------------------------

I ran into a similar issue with t:tabbedPane but the offending cast to 
HttpServletRequest was in
addAdditionalHeaderInfoToRender() of AddResource.java . Since this method is 
manipulating the header and that is not possible in a portal, the right thing 
might be to check if isPortalRequest and do nothing.

> Tomahawk's use of HttpServletRequest breaks JSF Portlets
> --------------------------------------------------------
>
>          Key: MYFACES-453
>          URL: http://issues.apache.org/jira/browse/MYFACES-453
>      Project: MyFaces
>         Type: Bug
>   Components: Tomahawk
>     Versions: 1.0.9m9
>     Reporter: Stan Silvert
>     Assignee: Stan Silvert
>  Attachments: AddResource.239380.patch
>
> I have a report of a user who wanted to use JSCookMenu in a portlet.  This 
> results in a ClassCastException because 
> org.apache.myfaces.component.html.util.AddResource assumes that the 
> underlying request object will be an HttpServletRequest.
> I will fix this for AddResource, but I suspect that there are other offending 
> classes in Tomahawk.  
> For future reference, you should always use methods from  ExternalContext 
> instead of doing (HttpServletRequest)ExternalContext.getRequest().
> If you MUST use features of HttpServletRequest that ExternalContext doesn't 
> offer then you should use the PortletUtil to make sure that you don't break 
> portlets.  To tell if you are running in a portlet environment, you can say:
> org.apache.myfaces.portlet.PortletUtil.isPortletRequest(FacesContext 
> facesContext)
> Note: calling PortletUtil does not put any dependency on the Portlet API.

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