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From "MTStorm (JIRA)" <j...@codehaus.org>
Subject [jira] Commented: (MSHARED-80) NullPointer in DefaultDependencyTreeBuilder.java:93, no logger
Date Wed, 05 Nov 2008 22:19:51 GMT

    [ http://jira.codehaus.org/browse/MSHARED-80?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=153181#action_153181
] 

MTStorm commented on MSHARED-80:
--------------------------------

Thanks, but the problem remains. Even when I copy the entire TreeMojo and deploy it in an
other groupId, the nullpointer remains...  Here is how the TreeMojo does it.

    /**
     * The dependency tree builder to use.
     * 
     * @component
     * @required
     * @readonly
     */
    private DependencyTreeBuilder dependencyTreeBuilder;

> 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
>            Assignee: Mark Hobson
>            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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