What options do I have to read the roles of the current user from my JSP pages? I'm aware of the visibleOnUserRole="myRole"
attribute on Tomahawk components, but I need roles for a bit more complicated things than simple visibility.
views:
1649answers:
1
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A:
The ExternalContext exposes user and role information.
public class RolesAccess implements Serializable {
public String getUserPrincipalName() {
FacesContext context = FacesContext.getCurrentInstance();
Principal principal = context.getExternalContext().getUserPrincipal();
if(principal == null) {
return null;
}
return principal.getName();
}
public String getUser() {
FacesContext context = FacesContext.getCurrentInstance();
return context.getExternalContext().getRemoteUser();
}
public boolean isManager() {
FacesContext context = FacesContext.getCurrentInstance();
return context.getExternalContext().isUserInRole("manager");
}
}
If you're using JSF in servlets, this information maps to the values exposed by the HttpServletRequest.
You can use managed beans to expose values to the view via the Expression Language.
<f:view>
<h:outputLabel value="#{rolesBean.userPrincipalName}" />
<h:outputLabel value="#{rolesBean.user}" />
<h:outputLabel value="#{rolesBean.manager}" />
</f:view>
McDowell
2008-11-13 13:06:19