Enable/Disable Editing of Form Fields based on User Roles

There are many ways to attack this problem,  and I’m sure someone will have a more elegant solution, but here’;s what I do.

 

I assume your userId is available as a request parameter or attribute.  ; If so you an initialize role properties in the backing bean constructor,  by that I mean look them up based on the user id and cache them in member variables, or a map.   On your backing bean provide access to these roles with property getters, for example

 

   public boolean isSomethingAllowed();

   public Boolean isAnotherThingAllowed();

 

etc

 

In the jsf bean selectively enable/disable components based on these properties using expression language,&nbsp; for example  <h:outputText disabled=&#8221;#{!bean.somethingAllowed}&#8221;/>.

 

Alternatively your bean can return the users role itself as a string and the logic for what’;s allowed put in the jsf

 

 &nbsp; public String getRole();&nbsp;  à &nbsp;  <h:outputText disabled=&#8221;#{!bean.role == ‘;superUser&#8217;}R21;/>

 

Hope that is helpful.

 

Jim

 

 

I know JSF/MyFaces has disable attribute but wondering how do i enable/disable based on user roles .

My other question is how do i pass userId from JSF page to Backing Bean.

Here is the situation
The JSF page has userId available from Single Sign On application. Now i wanna pass this userId to the Backing Bean so that i can retrieve user roles from the database based on userId.

Back to JSF form based on user roles i would like to enable/disable editing of certain form fields

Any pointers/suggestion on how to do this will be highly appreciated.
I am using MyFaces 1.1.4, Tomahawk 1.1.3, Sanbox, Facelets 1.1.12, Ajax4JSF 1.04, Spring, Hibernate

Regards
Bansi

 

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