How to enable/disable components in jsf/icefaces ?

Question

Hi, I am looking for how to enable and disable the icefaces components based on the user login ? For example:

if login as admin i need to enable the come more components and login as user, disable some components as well as add some other components in one page ? How to do this function in jsf/icefaces ?

These two enable and disable in one page .

I appericate your suggestions.

Answer 1

Use the rendered attribute. It accepts a boolean expression. Add a method to the User entity like isAdmin() or getRole() and let the rendered attribute intercept on that.

<h:someComponent rendered="#{user.admin}">
    Will be displayed when user.isAdmin() returns true.
</h:someComponent>
<h:someComponent rendered="#{user.role != 'ADMIN'}">
    Will be displayed when user.getRole() (String or enum) does not equal ADMIN.
</h:someComponent>

For the case you're interested, here are some more examples how you could use boolean expressions in EL:

<h:someComponent rendered="#{bean.booleanValue}" />
<h:someComponent rendered="#{bean.intValue > 10}" />
<h:someComponent rendered="#{bean.objectValue == null}" />
<h:someComponent rendered="#{bean.stringValue != 'someValue'}" />
<h:someComponent rendered="#{!empty bean.collectionValue}" />
<h:someComponent rendered="#{!bean.booleanValue && bean.intValue != 0}" />
<h:someComponent rendered="#{bean.enumValue == 'ONE' || bean.enumValue == 'TWO'}" />