AbstractSiteRenderingMojo causes a NPE if url of current project is not set
---------------------------------------------------------------------------
Key: MSITE-176
URL: http://jira.codehaus.org/browse/MSITE-176
Project: Maven 2.x Site Plugin
Issue Type: Bug
Affects Versions: 2.0
Environment: WinXP, Java5
Reporter: Martin Zeltner
Priority: Blocker
Attachments: patch_maven-site-plugin.txt
AbstractSiteRenderingMojo causes a NullPointerException in
org.apache.maven.doxia.site.decoration.inheritance.DefaultDecorationModelInheritanceAssembler
if url of current project is not set.
$ mvn site:site
...
[INFO] [site:site]
[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] null
[INFO] ------------------------------------------------------------------------
[INFO] Trace
java.lang.NullPointerException
at
org.apache.maven.doxia.site.decoration.inheritance.DefaultDecorationModelInheritanceAssembler.getParentPrefix
(DefaultDecorationModelInheritanceAssembler.java:340)
at
org.apache.maven.doxia.site.decoration.inheritance.DefaultDecorationModelInheritanceAssembler.assembleModelIn
heritance(DefaultDecorationModelInheritanceAssembler.java:46)
at
org.apache.maven.plugins.site.AbstractSiteRenderingMojo.getDecorationModel(AbstractSiteRenderingMojo.java:225
)
at
org.apache.maven.plugins.site.AbstractSiteRenderingMojo.getDecorationModel(AbstractSiteRenderingMojo.java:217
)
at
org.apache.maven.plugins.site.AbstractSiteRenderingMojo.getDecorationModel(AbstractSiteRenderingMojo.java:492
)
at
org.apache.maven.plugins.site.AbstractSiteRenderingMojo.createSiteRenderingContext(AbstractSiteRenderingMojo.
java:431)
at
org.apache.maven.plugins.site.SiteMojo.renderLocale(SiteMojo.java:108)
at org.apache.maven.plugins.site.SiteMojo.execute(SiteMojo.java:92)
at
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:417)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:534)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:488)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:458)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.jav
a:306)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:273)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:140)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:393)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:182)
at
org.apache.maven.embedder.MavenEmbedder.execute(MavenEmbedder.java:690)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:380)
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:585)
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)
This url is mostly not set, anyway not for each child module. To solve this
issue I did the following in method *getDecorationModel* of
*org.apache.maven.plugins.site.AbstractSiteRenderingMojo*:
If the parent model descriptor exists, the current and the parent model will be
assembled by using following url parameters:
If parent's url is null but child's not child's url will be used for parent.
If both urls are null the "url" "./" will be used for current and parent.
See appended patch.
Cheers,
Martin
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