[jbossseam-issues] [JBoss JIRA] Created: (JBSEAM-2469) add postback flag to page actions

[Dan Allen (JIRA)]

add postback flag to page actions
---------------------------------

                 Key: JBSEAM-2469
                 URL: http://jira.jboss.com/jira/browse/JBSEAM-2469
             Project: JBoss Seam
          Issue Type: Feature Request
          Components: Core
    Affects Versions: 2.0.1.CR1
            Reporter: Dan Allen
         Assigned To: Dan Allen
             Fix For: 2.0.x


Page actions are incredibly useful, but sometimes they can get in the way during a postback. I would like to see a postback attribute added to the <action> tag that can be used to disable the action on postback. It's possible using a conditional, but it is ugly and a lot of typing.

Here is the logic that would go into Pages.java

    private boolean isPostBack(FacesContext facesContext)
    {
        return facesContext.getExternalContext().getRequestParameterMap().
              containsKey(ResponseStateManager.VIEW_STATE_PARAM);
    }

The conditional alternative would be:

<action execute="#{component.action}" if="#{empty param['javax.faces.ViewState']}"/>

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