*
 * <p>Remote repositories are used for:
 * <ul>
 *   <li>Resolving artifacts and their metadata</li>
 *   <li>Downloading parent POMs and dependency POMs</li>
 *   <li>Retrieving version information and ranges</li>
 *   <li>Accessing plugin artifacts and their dependencies</li>
 * </ul>
 *
 * <p>Repository validation ensures data integrity by:
 * <ul>

        List<Artifact> artifacts = (List<Artifact>) value;

        assertEquals(1, artifacts.size());

        Artifact result = artifacts.get(0);

        assertEquals("testGroup", result.getGroupId());
    }

    @Test
    void testRootDirectoryNotPrefixed() throws Exception {
        ExpressionEvaluator ee = createExpressionEvaluator(createDefaultProject(), null, new Properties());

            toArtifacts(artifacts, node.getChildren(), nodeTrail, filter);
        }
    }

    public static Artifact toArtifact(org.apache.maven.artifact.Artifact artifact) {
        if (artifact == null) {
            return null;
        }

        String version = artifact.getVersion();
        if (version == null && artifact.getVersionRange() != null) {
            version = artifact.getVersionRange().toString();

  <groupId>com.google.guava</groupId>
  <artifactId>guava-bom</artifactId>
  <version>999.0.0-HEAD-jre-SNAPSHOT</version>
  <packaging>pom</packaging>

  <name>Guava BOM</name>
  <description>BOM for Guava artifacts</description>
  <url>https://github.com/google/guava</url>
  <inceptionYear>2010</inceptionYear>

  <licenses>
    <license>
      <name>Apache License, Version 2.0</name>

    // ConflictResolver methods -----------------------------------------------

    /*
     * @see org.apache.maven.artifact.resolver.conflict.ConflictResolver#resolveConflict(org.apache.maven.artifact.resolver.ResolutionNode,
     *      org.apache.maven.artifact.resolver.ResolutionNode)
     */

    @Override
    public ResolutionNode resolveConflict(ResolutionNode node1, ResolutionNode node2) {

     *
     * @param plugin The plugin whose descriptor should be retrieved, must not be {@code null}.
     * @param repositories The plugin repositories to use for resolving the plugin's main artifact, must not be {@code
     *            null}.
     * @param session The repository session to use for resolving the plugin's main artifact, must not be {@code null}.

import javax.inject.Named;
import javax.inject.Singleton;

import org.apache.maven.artifact.resolver.ResolutionNode;
import org.apache.maven.artifact.versioning.ArtifactVersion;
import org.apache.maven.artifact.versioning.OverConstrainedVersionException;

/**
 * Resolves conflicting artifacts by always selecting the newest declaration. Newest is defined as the

        assertInstanceOf(Collection.class, value);

        @SuppressWarnings("unchecked")
        Collection<Artifact> artifacts = (Collection<Artifact>) value;

        assertEquals(1, artifacts.size());

        Artifact result = artifacts.iterator().next();

        assertEquals("org.myco.plugins", result.getGroupId());
    }

    @Test

  particularly when we move mojos to a singleton instantiation model, and then
  run a reactorized project...the successive calls may leave behind configuration
  artifacts from invocation to invocation.

Maven Modifications

* DefaultPluginManager

  s/getMojoConfiguration()/getConfiguration()/g

  That should re-enable usage of mojo configuration. Ideally, we won't need any

    // ConflictResolver methods -----------------------------------------------

    /*
     * @see org.apache.maven.artifact.resolver.conflict.ConflictResolver#resolveConflict(org.apache.maven.artifact.resolver.ResolutionNode,
     *      org.apache.maven.artifact.resolver.ResolutionNode)
     */

    @Override
    public ResolutionNode resolveConflict(ResolutionNode node1, ResolutionNode node2) {