[jbossseam-issues] [JBoss JIRA] Commented: (JBSEAM-1231) Cannot pass empty parameters in *.page.xml

[Alan Fehr (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBSEAM-1231?page=comments#action_12360851 ] 
            
Alan Fehr commented on JBSEAM-1231:
-----------------------------------

No, I want exactly the contrary. I want to "clear" the parameter. This is useful for generating new entities (setting the id on the home to null) with the style of pages that are generated by seam-gen. It works fine when done in an s:link.

> Cannot pass empty parameters in *.page.xml
> ------------------------------------------
>
>                 Key: JBSEAM-1231
>                 URL: http://jira.jboss.com/jira/browse/JBSEAM-1231
>             Project: JBoss Seam
>          Issue Type: Bug
>    Affects Versions: 1.2.1.GA
>            Reporter: Alan Fehr
>         Assigned To: Pete Muir
>            Priority: Minor
>
> When passing an empty parameter in a redirect in a *.page.xml, I get a NullPointerException. Empty parameters work when used on pages (with s:link and <f:param name="paramName" />) but when used as mentioned I get:
> 2007-04-23 16:31:13,437 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[localhost].[/zdb].[Faces Servlet]] Servlet.service() for servlet Faces Servlet threw exception
> java.lang.NullPointerException
> 	at org.jboss.seam.pages.Param.getValueFromModel(Param.java:93)
> 	at org.jboss.seam.pages.RedirectNavigationHandler.navigate(RedirectNavigationHandler.java:36)
> 	at org.jboss.seam.pages.Rule.execute(Rule.java:91)
> 	at org.jboss.seam.pages.Navigation.navigate(Navigation.java:65)
> 	at org.jboss.seam.core.Pages.navigate(Pages.java:131)
> 	at org.jboss.seam.jsf.SeamNavigationHandler.handleNavigation(SeamNavigationHandler.java:32)
> 	at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:84)
> 	at javax.faces.component.UICommand.broadcast(UICommand.java:106)
> 	at javax.faces.component.UIViewRoot._broadcastForPhase(UIViewRoot.java:94)
> 	at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:168)
> 	at org.apache.myfaces.lifecycle.LifecycleImpl.invokeApplication(LifecycleImpl.java:343)
> 	at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:86)
> 	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:137)
> 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
> 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
> 	at org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)
> 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
> 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
> 	at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
> 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
> 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
> 	at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
> 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
> 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
> 	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
> 	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
> 	at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
> 	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:524)
> 	at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
> 	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
> 	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
> 	at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
> 	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
> 	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
> 	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
> 	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
> 	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
> 	at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
> 	at java.lang.Thread.run(Thread.java:619)

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