JSF and conditionnal rendered

Question

Hi all,
Does anyone can help me to solve the unability of JSF to evaluate a conditional rendered property ?
My goal is to set rendered property to true or false for components having a specific id (something like PROTECTEDxxxxx where xxxxx is a resource number). If the logged user have in B the authorization for using resource xxxxx, then the component must be rendered otherwise not.
I've search in the docs and in different forums, found posts about "viewhandler customization", but didn't understood exactly how to do it ( some posts also propose to use the getter of backingbean properties created for each protected item, but this is definitely not a good solution if you are looking for a generic method intended to work for thousands of protected items in an application !).
I imagine the way to achive this is to intercept (where in the lifecycle ? this is the first good question...) the component tree, test the protected values, replace their rendered attribute and let the rest of the process occur with the modified version of the component tree. But how ?...
Thx in advance for your help !

Answer 1

Hi! I've been facing the similar problem.
I've a property and a backing component called imcId and imcIdComponent. Following is the code I'm using:
<h:inputText id="imcId" value="#{imc.imcId}" binding="#{imc.imcIdComponent}" rendered="#{imc.imcId ne 0}" />
<h:outputText id="imcId" value="<Not Assigned>" rendered="#{imc.imcId eq 0}" />The problem I'm facing is the rendered tag is working okay and the components are rendered accordingly. When I submit page using rendered="#{imc.imcId ne 0}", the value is not assigned to the backing component, but if I change it to rendered="true", it works fine.
This is beyond my understanding that why the value is not assigned to the backing component when rendered is assigned dynamically. If the dynamic assigned value of rendered works okay for displaying the component then why it doesn't work for submitting the value to the backing component.
Very wierd behaviour!!
Farrukh