/**
     * Obtain the {@link Type} from the specified {@code id}.
     * <p>
     * Shortcut for {@code getService(TypeRegistry.class).require(...)}.
     *
     * @see org.apache.maven.api.services.TypeRegistry#require(String)
     */
    @Nonnull
    Type requireType(@Nonnull String id);

    /**
     * Obtain the {@link Language} from the specified {@code id}.
     * <p>

                currentData = superData;
            } else if (!parentIds.add(parentData.id())) {
                StringBuilder message = new StringBuilder("The parents form a cycle: ");
                for (String parentId : parentIds) {
                    message.append(parentId).append(" -> ");
                }
                message.append(parentData.id());

 */
@Experimental
public interface RepositoryFactory extends Service {

    @Nonnull
    LocalRepository createLocal(@Nonnull Path path);

    @Nonnull
    RemoteRepository createRemote(@Nonnull String id, @Nonnull String url);

    @Nonnull
    RemoteRepository createRemote(@Nonnull Repository repository);

    @Nonnull
    List<RemoteRepository> aggregate(
            @Nonnull Session session,

    protected DependencySelector getDependencySelector() {
        return new AndDependencySelector(
                ScopeDependencySelector.legacy(
                        null, Arrays.asList(DependencyScope.TEST.id(), DependencyScope.PROVIDED.id())),
                OptionalDependencySelector.fromDirect(),
                new ExclusionDependencySelector());
    }

    protected DependencyGraphTransformer getDependencyGraphTransformer() {

        LocalRepository localRepository = s.createLocalRepository(localRepoPath);
        RemoteRepository remoteRepository = s.createRemoteRepository(
                RemoteRepository.CENTRAL_ID, remoteRepoPath.toUri().toString());
        session = s.withLocalRepository(localRepository).withRemoteRepositories(List.of(remoteRepository));
    }

    @Test

    }

    @Override
    public RemoteRepository createRemote(String id, String url) {
        return new DefaultRemoteRepository(
                new org.eclipse.aether.repository.RemoteRepository.Builder(id, "default", url).build());
    }

    @Override
    public RemoteRepository createRemote(Repository repository) throws IllegalArgumentException {

   * @param otherElements the rest of the elements the set should contain
   * @return an immutable set containing those elements, minus duplicates
   */
  // http://code.google.com/p/google-web-toolkit/issues/detail?id=3028
  @GwtCompatible(serializable = true)
  public static <E extends Enum<E>> ImmutableSet<E> immutableEnumSet(
      E anElement, E... otherElements) {

 * is meant for exclusive consumption by the model builder and is opaque to the cache implementation. The cache key is
 * formed by a combination of group id, artifact id, version and tag. The first three components generally refer to the
 * identity of a model. The tag allows for further classification of the associated data on the sole discretion of the
 * model builder.
 *
 */

    @Nonnull
    @Override
    public Optional<Path> getPath(@Nonnull Artifact artifact) {
        String id = id(nonNull(artifact, "artifact"));
        if (session.getMavenSession().getAllProjects() != null) {
            for (MavenProject project : session.getMavenSession().getAllProjects()) {
                if (id.equals(id(project.getArtifact()))
                        && project.getArtifact().getFile() != null) {

    }

    private static List<Repository> pruneRepositories(List<Repository> repositories) {
        return repositories.stream()
                .filter(r -> !org.apache.maven.api.Repository.CENTRAL_ID.equals(r.getId()))
                .collect(Collectors.toList());
    }