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Posted to dev@tapestry.apache.org by "Hudson (JIRA)" <de...@tapestry.apache.org> on 2009/11/19 05:42:40 UTC
[jira] Commented: (TAPESTRY-2570) NPE when trying to report an
exception involving an instance that returns null for toString()
[ https://issues.apache.org/jira/browse/TAPESTRY-2570?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12779826#action_12779826 ]
Hudson commented on TAPESTRY-2570:
----------------------------------
Integrated in tapestry-4.1-trunk #11 (See [http://hudson.zones.apache.org/hudson/job/tapestry-4.1-trunk/11/])
> NPE when trying to report an exception involving an instance that returns null for toString()
> ---------------------------------------------------------------------------------------------
>
> Key: TAPESTRY-2570
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2570
> Project: Tapestry
> Issue Type: Bug
> Components: Framework
> Affects Versions: 4.1.5
> Reporter: Patrick Moore
> Assignee: Andreas Andreou
> Priority: Minor
> Fix For: 4.1.7
>
>
> Problem occured when I had a custom hivemind schema. The custom hivemind schema was trying to set a non-existent property on an object that was being created. Because the 'value's toString() method just returns one of its properties as its string value, value.toString() returns null.
> Code from ExceptionAnaylzer:
> (line 178) stringValue = value.toString().trim();
> if (stringValue.length() == 0)
> continue;
> ------------------------
> value.toString() returns null. Seems somewhat useless code.....
> I don't understand why the stringValue.length is being checked for it being an empty string because then stringValue is not used. And no comments to help :-(
> ----------------------
> Thread trace:
> Thread [main] (Suspended (exception NullPointerException))
> ExceptionAnalyzer.buildDescription(Throwable) line: 178
> ExceptionAnalyzer.analyze(Throwable) line: 87
> ExceptionAnalyzer.reportException(Throwable, PrintStream) line: 371
> ApplicationServlet.show(Exception) line: 158
> ApplicationServlet.init(ServletConfig) line: 207
> StandardWrapper.loadServlet() line: 1139
> StandardWrapper.load() line: 966
> StandardContext.loadOnStartup(Container[]) line: 3956
> StandardContext.start() line: 4230
> StandardHost(ContainerBase).addChildInternal(Container) line: 760
> StandardHost(ContainerBase).addChild(Container) line: 740
> StandardHost.addChild(Container) line: 544
> HostConfig.deployDescriptor(String, File, String) line: 626
> HostConfig.deployDescriptors(File, String[]) line: 553
> HostConfig.deployApps() line: 488
> HostConfig.start() line: 1149
> HostConfig.lifecycleEvent(LifecycleEvent) line: 311
> LifecycleSupport.fireLifecycleEvent(String, Object) line: 120
> StandardHost(ContainerBase).start() line: 1022
> StandardHost.start() line: 736
> StandardEngine(ContainerBase).start() line: 1014
> StandardEngine.start() line: 443
> StandardService.start() line: 448
> StandardServer.start() line: 700
> Catalina.start() line: 552
> NativeMethodAccessorImpl.invoke0(Method, Object, Object[]) line: not available [native method]
> NativeMethodAccessorImpl.invoke(Object, Object[]) line: 39
> DelegatingMethodAccessorImpl.invoke(Object, Object[]) line: 25
> Method.invoke(Object, Object...) line: 597
> Bootstrap.start() line: 295
> Bootstrap.main(String[]) line: 433
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