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From "Stefan Seifert (JIRA)" <j...@apache.org>
Subject [jira] Closed: (FELIX-1629) SCR Annotations with Constanst reference may cause NPE
Date Mon, 16 Nov 2009 12:29:39 GMT

     [ https://issues.apache.org/jira/browse/FELIX-1629?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Stefan Seifert closed FELIX-1629.
---------------------------------


> SCR Annotations with Constanst reference may cause NPE
> ------------------------------------------------------
>
>                 Key: FELIX-1629
>                 URL: https://issues.apache.org/jira/browse/FELIX-1629
>             Project: Felix
>          Issue Type: Bug
>          Components: Maven SCR Plugin
>    Affects Versions: maven-scr-plugin-1.4.0
>            Reporter: Stefan Seifert
>            Assignee: Carsten Ziegeler
>            Priority: Minor
>             Fix For: maven-scr-plugin-1.4.1
>
>         Attachments: 090922_npe_fix_FELIX-1629.patch
>
>
> under certain circumstances the maven scr plugin throws a NPE like this
> java.lang.NullPointerException
>         at org.apache.felix.scrplugin.tags.annotation.defaulttag.Util.getAnnotationValue(Util.java:362)
>         at org.apache.felix.scrplugin.tags.annotation.defaulttag.Util.getAnnotationValues(Util.java:399)
>         at org.apache.felix.scrplugin.tags.annotation.defaulttag.Util.getStringValue(Util.java:277)
>         at org.cqstone.core.annotationtagprovider.ComponentComponentTag.<init>(ComponentComponentTag.java:31)
>         at org.cqstone.core.annotationtagprovider.CqstoneAnnotationTagProvider.getTags(CqstoneAnnotationTagProvider.java:31)
>         at org.apache.felix.scrplugin.tags.annotation.AnnotationTagProviderManager.getTags(AnnotationTagProviderManager.java:105)
>         at org.apache.felix.scrplugin.tags.annotation.AnnotationTagProviderManager.getTags(AnnotationTagProviderManager.java:90)
>         at org.apache.felix.scrplugin.tags.annotation.AnnotationTagProviderManager.hasScrPluginAnnotation(AnnotationTagProviderManager.java:118)
>         at org.apache.felix.scrplugin.tags.JavaClassDescriptorManager.getJavaClassDescription(JavaClassDescriptorManager.java:417)
>         at org.apache.felix.scrplugin.tags.JavaClassDescriptorManager.getSourceDescriptions(JavaClassDescriptorManager.java:394)
>         at org.apache.felix.scrplugin.SCRDescriptorMojo.execute(SCRDescriptorMojo.java:167)
>         at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:490)
>         at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:694)
>         at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:569)
>         at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:539)
>         at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:387)
>         at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:348)
>         at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:180)
>         at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328)
>         at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138)
>         at org.apache.maven.cli.MavenCli.main(MavenCli.java:362)
>         at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:60)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
>         at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
>         at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
>         at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
> the reason of the NPE is that the "prescan" which is done in AnnotationTagProviderManager#hasScrPluginAnnotation
to check if any annotation is present in a java class at all calls the getTags methods without
a "JavaClassDescription" object. but Util.getAnnotationValue depends on this, although this
is not needed for the "prescan" check.
> the attached patch fixes this problem.

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