getting a NPE trying to access the page's root element (page is null).
Page is obtained from the active page from the page render queue.
So, it looks like you're trying to create an action link while no page
is rendering.
Cheers.
Robert
On Feb 20, 2008, at 2/202:03 PM , Joachim Van der Auwera wrote:
Does anybody have an idea what I am doing wrong?
Using the latest snapshot of tapestry5.
In the following code :
@Inject
private ComponentResources resources;
/**
* Act upon the "link"
*/
void onSelected()
{
Link link = resources.createActionLink( "action", false,
contextArray );
}
I get a NPE with the following stack trace
*
org
.apache
.tapestry
.internal
.services
.LinkFactoryImpl
.collectActivationContextForPage(LinkFactoryImpl.java:217)
*
org
.apache
.tapestry
.internal
.services.LinkFactoryImpl.createActionLink(LinkFactoryImpl.java:129)
*
org
.apache
.tapestry.internal.structure.PageImpl.createActionLink(PageImpl.java:
156)
*
org
.apache
.tapestry
.internal
.structure
.InternalComponentResourcesImpl
.createActionLink(InternalComponentResourcesImpl.java:123)
*
org
.equanda
.tapestry5.components.FormActionLink.onSelected(FormActionLink.java:
64)
*
org
.equanda
.tapestry5
.components.FormActionLink.dispatchComponentEvent(FormActionLink.java)
*
org
.apache
.tapestry
.internal
.structure
.ComponentPageElementImpl
.dispatchEvent(ComponentPageElementImpl.java:843)
*
org
.apache
.tapestry
.internal
.structure
.ComponentPageElementImpl
.triggerContextEvent(ComponentPageElementImpl.java:1004)
*
org
.apache
.tapestry
.internal
.structure
.ComponentPageElementImpl.triggerEvent(ComponentPageElementImpl.java:
934)
*
org
.apache
.tapestry
.internal
.structure
.InternalComponentResourcesImpl
.triggerEvent(InternalComponentResourcesImpl.java:154)
* org.apache.tapestry.corelib.components.Submit
$1.run(Submit.java:93)
*
org
.apache
.tapestry
.corelib
.internal.FormSupportImpl.executeDeferred(FormSupportImpl.java:114)
*
org.apache.tapestry.corelib.components.Form.onAction(Form.java:396)
*
org
.apache
.tapestry.corelib.components.Form.dispatchComponentEvent(Form.java)
*
org
.equanda.tapestry5.components.Form.dispatchComponentEvent(Form.java)
*
org
.apache
.tapestry
.internal
.structure
.ComponentPageElementImpl
.dispatchEvent(ComponentPageElementImpl.java:851)
*
org
.apache
.tapestry
.internal
.structure
.ComponentPageElementImpl
.triggerContextEvent(ComponentPageElementImpl.java:1004)
*
org
.apache
.tapestry
.internal
.services
.ComponentEventRequestHandlerImpl
.handle(ComponentEventRequestHandlerImpl.java:67)
*
org
.apache
.tapestry
.internal
.services
.ImmediateActionRenderResponseFilter
.handle(ImmediateActionRenderResponseFilter.java:42)
*
org
.apache.tapestry.internal.services.AjaxFilter.handle(AjaxFilter.java:
42)
* org.apache.tapestry.services.TapestryModule
$39.handle(TapestryModule.java:2077)
*
org
.apache
.tapestry
.internal
.services
.ComponentEventDispatcher.dispatch(ComponentEventDispatcher.java:131)
* org.apache.tapestry.services.TapestryModule
$13.service(TapestryModule.java:914)
* be.synergetics.ca.gui.services.AppModule
$2.service(AppModule.java:175)
* be.synergetics.ca.gui.services.AppModule
$1.service(AppModule.java:102)
*
org
.apache
.tapestry
.internal
.services.LocalizationFilter.service(LocalizationFilter.java:43)
* org.apache.tapestry.services.TapestryModule
$3.service(TapestryModule.java:530)
* org.apache.tapestry.services.TapestryModule
$2.service(TapestryModule.java:505)
*
org
.apache
.tapestry
.internal.services.StaticFilesFilter.service(StaticFilesFilter.java:
79)
* org.equanda.t5gui.services.AppModule
$7.service(AppModule.java:175)
* org.apache.tapestry.internal.services.CheckForUpdatesFilter
$2.invoke(CheckForUpdatesFilter.java:93)
* org.apache.tapestry.internal.services.CheckForUpdatesFilter
$2.invoke(CheckForUpdatesFilter.java:84)
*
org
.apache
.tapestry
.ioc.internal.util.ConcurrentBarrier.withRead(ConcurrentBarrier.java:
77)
*
org
.apache
.tapestry
.internal
.services.CheckForUpdatesFilter.service(CheckForUpdatesFilter.java:
106)
* org.apache.tapestry.services.TapestryModule
$12.service(TapestryModule.java:894)
*
org
.apache
.tapestry
.internal
.services.IgnoredPathsFilter.service(IgnoredPathsFilter.java:62)
*
org.apache.tapestry.TapestryFilter.doFilter(TapestryFilter.java:164)
*
org
.apache
.catalina
.core
.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:
235)
*
org
.apache
.catalina
.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
*
org
.jboss
.web
.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
*
org
.apache
.catalina
.core
.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:
235)
*
org
.apache
.catalina
.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
*
org
.apache
.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:
230)
*
org
.apache
.catalina.core.StandardContextValve.invoke(StandardContextValve.java:
175)
*
org
.jboss
.web
.tomcat
.security
.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
*
org
.apache
.catalina
.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:524)
*
org
.jboss
.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
*
org
.apache
.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
*
org
.apache
.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
*
org
.jboss
.web
.tomcat
.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:
157)
*
org
.apache
.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:
109)
*
org
.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:
262)
*
org
.apache.coyote.http11.Http11Processor.process(Http11Processor.java:
844)
* org.apache.coyote.http11.Http11Protocol
$Http11ConnectionHandler.process(Http11Protocol.java:583)
* org.apache.tomcat.util.net.JIoEndpoint
$Worker.run(JIoEndpoint.java:446)
* java.lang.Thread.run(Thread.java:595)
--
Joachim Van der Auwera
PROGS bvba, progs.be
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