[jbossseam-issues] [JBoss JIRA] Commented: (JBSEAM-605) navigation-rules.xml to allow outcome expression

[Gavin King (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBSEAM-605?page=comments#action_12348868 ] 
            
Gavin King commented on JBSEAM-605:
-----------------------------------

This stuff fits right into pages.xml

> navigation-rules.xml to allow outcome expression
> ------------------------------------------------
>
>                 Key: JBSEAM-605
>                 URL: http://jira.jboss.com/jira/browse/JBSEAM-605
>             Project: JBoss Seam
>          Issue Type: Feature Request
>          Components: JSF
>            Reporter: Gavin King
>         Assigned To: Gavin King
>             Fix For: 1.1.1.GA
>
>
> jPDL allows us to make navigation decisions in EL instead of the Java code. This allows a lot of loose coupling and transparency. We should also support this for stateless navigation, ie:
> <page view-id="/loadCustomer.jsp">
>     <from-action expression="#{customerHome.load}" outcome="#{customerHome.found}">
>         <from-outcome value="true">
>             <render view-id="/displayCustomer.jsp"/>
>         </from-outcome>
>         <from-outcome value="false">
>             <render view-id="/notFound.jsp"/>
>          </from-outcome>
>     </from-action>
> </page>
> It can reduce to:
> <page view-id="/loadCustomer.jsp">
>     <from-action expression="#{customerHome.load}">
>         <from-outcome value="success">
>             <render view-id="/displayCustomer.jsp"/>
>         </from-outcome>
>         <from-outcome value="not-found">
>             <render view-id="/notFound.jsp"/>
>          </from-outcome>
>     </from-action>
> </page>
> to emulate a normal JSF navigation rule.

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