[
http://jira.codehaus.org/browse/MSHARED-80?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=153086#action_153086
]
MTStorm commented on MSHARED-80:
--------------------------------
Did some more research. I have copied a TreeMojo from maven-dependency-tree to
a standalone maven plugin and I had the same problem. I have also downgraded
the version from 1.2 to 1.1 and I have the same Nullpointer.
I forgot the stracktrace, oeps here it is for the bug
java.lang.NullPointerException
at
org.apache.maven.shared.dependency.tree.DefaultDependencyTreeBuilder.buildDependencyTree(DefaultDependencyTreeBuilder.java:93)
at
net.sourceforge.miauwframework.maven.dependencies.plugin.DependenciesReportMojo.constructDependencyStructure(DependenciesReportMojo.java:274)
at
net.sourceforge.miauwframework.maven.dependencies.plugin.DependenciesReportMojo.beforeExecuteReport(DependenciesReportMojo.java:362)
at
net.sourceforge.miauwframework.plugins.maven.common.AbstractMiauwframworkReport.executeReport(AbstractMiauwframworkReport.java:116)
at
org.apache.maven.reporting.AbstractMavenReport.generate(AbstractMavenReport.java:98)
at
org.apache.maven.plugins.site.ReportDocumentRenderer.renderDocument(ReportDocumentRenderer.java:139)
at
org.apache.maven.doxia.siterenderer.DefaultSiteRenderer.renderModule(DefaultSiteRenderer.java:269)
at
org.apache.maven.doxia.siterenderer.DefaultSiteRenderer.render(DefaultSiteRenderer.java:101)
at
org.apache.maven.plugins.site.SiteMojo.renderLocale(SiteMojo.java:129)
at org.apache.maven.plugins.site.SiteMojo.execute(SiteMojo.java:96)
at
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:451)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:558)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:499)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:478)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:330)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:291)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:287)
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)
[INFO] ------------------------------------------------------------------------
> NullPointer in DefaultDependencyTreeBuilder.java:93, no logger
> ---------------------------------------------------------------
>
> Key: MSHARED-80
> URL: http://jira.codehaus.org/browse/MSHARED-80
> Project: Maven Shared Components
> Issue Type: Bug
> Components: maven-dependency-tree
> Affects Versions: maven-dependency-tree 1.2
> Environment: Windows XP 64 JDK 1.6
> Reporter: MTStorm
> Priority: Critical
>
> I have a report and a mojo that seeks transversal dependencies. It shows a
> nullpointer in the DefaultDependencyTreeBuilder.
> I can not figure it out what is wrong sice the implementation off
> DependencyTreeBuilder is assigned by Maven and I have no controll on the
> logger.
> Here is the code snippet
> //members
> /**
> * Used to look up Artifacts in the remote repository.
> *
> * @parameter expression=
> *
> "${component.org.apache.maven.artifact.factory.ArtifactFactory}"
> * @required
> * @readonly
> */
> protected org.apache.maven.artifact.factory.ArtifactFactory
> artifactFactory;
> /**
> * Used to look up Artifacts in the remote repository.
> *
> * @parameter expression=
> *
> "${component.org.apache.maven.artifact.resolver.ArtifactResolver}"
> * @required
> * @readonly
> */
> protected org.apache.maven.artifact.resolver.ArtifactResolver resolver;
> /**
> * Artifact collector, needed to resolve dependencies.
> *
> * @component
> role="org.apache.maven.artifact.resolver.ArtifactCollector"
> * @required
> * @readonly
> */
> protected ArtifactCollector artifactCollector;
> /**
> * @component
> *
> role="org.apache.maven.artifact.metadata.ArtifactMetadataSource"
> * hint="maven"
> * @required
> * @readonly
> */
> protected ArtifactMetadataSource artifactMetadataSource;
> /**
> * Dependency tree builder component.
> *
> * @component expression=
> *
> "org.apache.maven.shared.dependency.tree.DependencyTreeBuilder"
> * @required
> * @readonly
> */
> private DependencyTreeBuilder dependencyTreeBuilder;
> //sample snippet to use in report and mojo
> ArtifactFilter artifactFilter = new ScopeArtifactFilter(
> Artifact.SCOPE_COMPILE);
> DependencyNode dn;
> getLog().info("Start");
> try {
> dn = dependencyTreeBuilder.buildDependencyTree(
> project, localRepository,
> artifactFactory, artifactMetadataSource,
> artifactFilter, artifactCollector);
>
> } catch (DependencyTreeBuilderException e) {
> e.printStackTrace();
> getLog().error("oeps",e);
> }
> getLog().info("Done");
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