* <li>Information on how to use the artifact as a dependency: whether to add it to the classpath, whether to load its
 * dependencies transitively</li>
 * </ul>
 *
 */
public interface ArtifactHandler {
    @Deprecated
    String ROLE = ArtifactHandler.class.getName();

    /**
     * Returns the file name extension of the artifact;

    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <!-- *not* <scope>test</scope>; <scope>compile</scope> is right so that guava-testlib users get junit transitively. -->
      <version>${junit.version}</version>
    </dependency>
    <dependency>
      <!--
      Do not include Truth in non-test scope! Doing so creates a problematic dependency cycle.
      -->

import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 * Verifies the version of a dependency listed in a parent's
 * dependencyManagement section is chosen over another version of the same
 * dependency, listed transitively.
 *
 */
@Deprecated
@SuppressWarnings("checkstyle:UnusedLocalVariable")
class ProjectInheritanceTest extends AbstractProjectInheritanceTestCase {

    }

    @Test
    void testThatASystemScopedDependencyIsNotResolvedFromRepositories() throws Exception {
        //
        // We should get a whole slew of dependencies resolving this artifact transitively
        //
        Dependency d = new Dependency();
        d.setGroupId("org.apache.maven.its");
        d.setArtifactId("b");
        d.setVersion("0.1");
        d.setScope(Artifact.SCOPE_COMPILE);

                      ImmutableSet.copyOf(TypeToken.of(concreteClass).getTypes().rawTypes())));

  /**
   * Flattens a class's type hierarchy into a set of {@code Class} objects including all
   * superclasses (transitively) and all interfaces implemented by these superclasses.
   */
  @VisibleForTesting
  static ImmutableSet<Class<?>> flattenHierarchy(Class<?> concreteClass) {
    return flattenHierarchyCache.getUnchecked(concreteClass);

      // Note that if all the futures on the list are done prior to completing this loop, the last
      // call to addListener() will callback to setOneValue(), transitively call our cleanup
      // listener, and set this.futures to null.
      // This is not actually a problem, since the foreach only needs this.futures to be non-null
      // at the beginning of the loop.
      int i = 0;

            See <a href="https://s.apache.org/dependency-version">dependency version requirement documentation</a>
            and <a href="https://s.apache.org/transitive-dependencies-resolution">transitive dependencies resolution</a> for more details.
            ]]>
          </description>
          <type>String</type>
        </field>
        <field>
          <name>type</name>

                Arrays.asList(depender1, transitiveOnly, depender2, depender3, aProject));

        final List<MavenProject> downstreamProjects = graph.getDownstreamProjects(aProject, true);
        assertEquals(depender1, downstreamProjects.get(0));
        assertEquals(depender3, downstreamProjects.get(1));
        assertEquals(transitiveOnly, downstreamProjects.get(2));

    void downstreamProjectsShouldBeCached(boolean transitive) {
        FilteredProjectDependencyGraph graph =
                new FilteredProjectDependencyGraph(projectDependencyGraph, List.of(aProject));

        when(projectDependencyGraph.getDownstreamProjects(bProject, transitive)).thenReturn(List.of(cProject));

        graph.getDownstreamProjects(bProject, transitive);
        graph.getDownstreamProjects(bProject, transitive);

        for (String id : sorter.getDependents(projectId)) {
            if (projectIds.add(id) && transitive) {
                getDownstreamProjects(id, projectIds, transitive);
            }
        }
    }

    @Override
    public List<MavenProject> getUpstreamProjects(MavenProject project, boolean transitive) {
        Objects.requireNonNull(project, "project cannot be null");