[TAPESTRY-1004] NPE in EventListenerAnnotationWorker

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.1
• Fix Version/s: 4.1
• Component/s: Annotations
• Environment: jdk 1.5.0_07; tapestry snapshot 4.1.0-20060711.165511-11; jetty 5.1.10
• Assignee: Jesse Kuhnert
• Reporter: Mark Reynolds
• Created: 12/Jul/06 06:38
• Updated: 15/Jul/06 19:38
• Resolved: 15/Jul/06 19:38

Description

I hope this stack trace is enough. I will try to narrow it down to a reproduction recipe if need be. I am not using the new @EventListener annotation. I just dropped in the 4.1.0-SNAPSHOT as a replacement for 4.0.2 and hit this.

Error: Error enhancing method public abstract int com.whatever.page.presentation.ListPresentations.getDefaultPageSize(): java.lang.NullPointerException

• org.apache.tapestry.annotations.EventListenerAnnotationWorker.peformEnhancement(EventListenerAnnotationWorker.java:50)
• $SecondaryAnnotationWorker_10c5fea843f.peformEnhancement($SecondaryAnnotationWorker_10c5fea843f.java)
• $SecondaryAnnotationWorker_10c5fea8441.peformEnhancement($SecondaryAnnotationWorker_10c5fea8441.java)
• $SecondaryAnnotationWorker_10c5fea843b.peformEnhancement($SecondaryAnnotationWorker_10c5fea843b.java)
• org.apache.tapestry.annotations.AnnotationEnhancementWorker.performMethodEnhancement(AnnotationEnhancementWorker.java:119)
• org.apache.tapestry.annotations.AnnotationEnhancementWorker.performEnhancement(AnnotationEnhancementWorker.java:70)
• $EnhancementWorker_10c5fea8439.performEnhancement($EnhancementWorker_10c5fea8439.java)
• $EnhancementWorker_10c5fea8438.performEnhancement($EnhancementWorker_10c5fea8438.java)
• $EnhancementWorker_10c5fea843a.performEnhancement($EnhancementWorker_10c5fea843a.java)
• $EnhancementWorker_10c5fea8411.performEnhancement($EnhancementWorker_10c5fea8411.java)
• $EnhancementWorker_10c5fea8410.performEnhancement($EnhancementWorker_10c5fea8410.java)
• org.apache.tapestry.services.impl.ComponentConstructorFactoryImpl.getComponentConstructor(ComponentConstructorFactoryImpl.java:97)
• $ComponentConstructorFactory_10c5fea83fe.getComponentConstructor($ComponentConstructorFactory_10c5fea83fe.java)
• $ComponentConstructorFactory_10c5fea83fd.getComponentConstructor($ComponentConstructorFactory_10c5fea83fd.java)
• org.apache.tapestry.pageload.PageLoader.instantiatePage(PageLoader.java:567)
• org.apache.tapestry.pageload.PageLoader.loadPage(PageLoader.java:594)
• $IPageLoader_10c5fea83f7.loadPage($IPageLoader_10c5fea83f7.java)
• $IPageLoader_10c5fea83f8.loadPage($IPageLoader_10c5fea83f8.java)
• org.apache.tapestry.pageload.PageSource.getPage(PageSource.java:117)
• $IPageSource_10c5fea8358.getPage($IPageSource_10c5fea8358.java)
• $IPageSource_10c5fea8357.getPage($IPageSource_10c5fea8357.java)
• org.apache.tapestry.engine.RequestCycle.loadPage(RequestCycle.java:249)
• org.apache.tapestry.engine.RequestCycle.getPage(RequestCycle.java:236)
• org.apache.tapestry.engine.RequestCycle.activate(RequestCycle.java:580)
• org.apache.tapestry.engine.PageService.service(PageService.java:66)
• $IEngineService_10c5fea83e1.service($IEngineService_10c5fea83e1.java)
• org.apache.tapestry.services.impl.EngineServiceInnerProxy.service(EngineServiceInnerProxy.java:77)
• org.apache.tapestry.services.impl.EngineServiceOuterProxy.service(EngineServiceOuterProxy.java:72)
• org.apache.tapestry.engine.AbstractEngine.service(AbstractEngine.java:241)
• org.apache.tapestry.services.impl.InvokeEngineTerminator.service(InvokeEngineTerminator.java:60)
• $WebRequestServicer_10c5fea83b6.service($WebRequestServicer_10c5fea83b6.java)
• $WebRequestServicer_10c5fea83b5.service($WebRequestServicer_10c5fea83b5.java)
• $WebRequestServicer_10c5fea83b2.service($WebRequestServicer_10c5fea83b2.java)
• $WebRequestServicer_10c5fea83b1.service($WebRequestServicer_10c5fea83b1.java)
• org.apache.tapestry.services.impl.WebRequestServicerPipelineBridge.service(WebRequestServicerPipelineBridge.java:56)
• $ServletRequestServicer_10c5fea839e.service($ServletRequestServicer_10c5fea839e.java)
• $ServletRequestServicer_10c5fea839d.service($ServletRequestServicer_10c5fea839d.java)
• org.apache.tapestry.request.DecodedRequestInjector.service(DecodedRequestInjector.java:55)
• $ServletRequestServicerFilter_10c5fea839a.service($ServletRequestServicerFilter_10c5fea839a.java)
• $ServletRequestServicerFilter_10c5fea8399.service($ServletRequestServicerFilter_10c5fea8399.java)
• $ServletRequestServicer_10c5fea839f.service($ServletRequestServicer_10c5fea839f.java)
• org.apache.tapestry.multipart.MultipartDecoderFilter.service(MultipartDecoderFilter.java:52)
• $ServletRequestServicerFilter_10c5fea8398.service($ServletRequestServicerFilter_10c5fea8398.java)
• $ServletRequestServicerFilter_10c5fea8397.service($ServletRequestServicerFilter_10c5fea8397.java)
• $ServletRequestServicer_10c5fea839f.service($ServletRequestServicer_10c5fea839f.java)
• org.apache.tapestry.services.impl.SetupRequestEncoding.service(SetupRequestEncoding.java:53)
• $ServletRequestServicerFilter_10c5fea839c.service($ServletRequestServicerFilter_10c5fea839c.java)
• $ServletRequestServicerFilter_10c5fea839b.service($ServletRequestServicerFilter_10c5fea839b.java)
• $ServletRequestServicer_10c5fea839f.service($ServletRequestServicer_10c5fea839f.java)
• $ServletRequestServicer_10c5fea8392.service($ServletRequestServicer_10c5fea8392.java)
• $ServletRequestServicer_10c5fea8391.service($ServletRequestServicer_10c5fea8391.java)
• org.apache.tapestry.ApplicationServlet.doService(ApplicationServlet.java:123)
• org.apache.tapestry.ApplicationServlet.doGet(ApplicationServlet.java:104)
• javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
• javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
• org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
• org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:473)
• org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
• org.mortbay.http.HttpContext.handle(HttpContext.java:1530)
• org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:633)
• org.mortbay.http.HttpContext.handle(HttpContext.java:1482)
• org.mortbay.http.HttpServer.service(HttpServer.java:909)
• org.mortbay.http.HttpConnection.service(HttpConnection.java:816)
• org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:982)
• org.mortbay.http.HttpConnection.handle(HttpConnection.java:833)
• org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)
• org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
• org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)