Simple navigation problem

[pozezefat]

Hello,

I've a very simple navigation problem.
I've got an xhtml file liste.xhtml and a liste.page.xml file.
I would like to redirect users when they try to access directly this page and the proper data have not been initalized.

In my liste.page.xml, I've done somrthing like that :

<navigation>
  <rule if="#{action.datas == null or action.datas.isEmpty()}">
    <redirect view-id="/pages/empty.xhtml"/>
  </rule>
</navigation>

But it seems to be ignored.
When I add an action tag at the beginning of the file, the navigation works, but the method isn't useful (it's empty) :

<action execute="#{action.nothing()}"/>

<navigation>
  <rule if="#{action.datas == null or action.datas.isEmpty()}">
    <redirect view-id="/pages/empty.xhtml"/>
  </rule>
</navigation>

Is there a cleaner way to do that ?

[cosmo]

Also you can check if the conditions are fulfilled at the <action execute part. If not throw an exception and then catch it with pages.xml

[nathandennis]

i was under the impression that these navigations were action based, but i might be wrong. why not just handle it in the action you call in your bean? you are already calling it.

<action execute="#{action.nothing()}"/>

looks like you would want to do this anyway because if its not initialized than you would probably want to initialize it instead of dealing with a NPE in your xml. NPE in xml are bad juju. move it in a bean, wrap it in a try. configure the redirect path in xml as a resource if you want, complete your business logic then put the right stuff on the screen.

[nathandennis]

someone needs to do something about this spam.. i hate them.. but its time for CAPTCHA

[pozezefat]

You must be right.
As my action is initilized, I don't really need this page.xml file, I can do it all in the method.
Well, in fact, it does not really need to be initialized, I could have written :

<rule if="#{action == null or action.datas == null or action.datas.isEmpty()}">

But it needs to be on the page they will be redirected, so my problem is kinf of solved.

Thanks.