* @see Repository
 * @see LocalRepository
 * @see Session#getSettings()
 * @see ModelBase#getRepositories()
 * @see ModelBase#getPluginRepositories()
 */
@Experimental
@Immutable
public interface RemoteRepository extends Repository {

    @Nonnull
    String getUrl();

    @Nonnull
    String getProtocol();

        assertTrue(updateCheckManager.isUpdateRequired(metadata, remoteRepository, file));

        updateCheckManager.touch(metadata, remoteRepository, file);

        assertFalse(updateCheckManager.isUpdateRequired(metadata, remoteRepository, file));

        assertNotNull(updateCheckManager.readLastUpdated(
                touchFile, updateCheckManager.getMetadataKey(remoteRepository, file)));
    }

    @Test

 * under the License.
 */
package org.apache.maven.plugin.version;

import java.util.List;

import org.eclipse.aether.repository.LocalRepository;
import org.eclipse.aether.repository.RemoteRepository;

/**
 * PluginVersionResolutionException
 */
public class PluginVersionResolutionException extends Exception {
    private final String groupId;

    private final String artifactId;

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

    @Nonnull
    RemoteRepository createRemote(@Nonnull Repository repository);

    @Nonnull
    List<RemoteRepository> aggregate(
            @Nonnull Session session,
            @Nonnull List<RemoteRepository> dominant,
            @Nonnull List<RemoteRepository> recessive,
            boolean processRecessive);

            DependencyFilter dependencyFilter,
            List<RemoteRepository> repositories,
            RepositorySystemSession session)
            throws PluginResolutionException;

    DependencyResult resolvePlugin(
            Plugin plugin,
            Artifact artifact,
            DependencyFilter dependencyFilter,
            List<RemoteRepository> remotePluginRepositories,

    List<org.apache.maven.artifact.repository.ArtifactRepository> toArtifactRepositories(
            List<RemoteRepository> repositories);

    org.apache.maven.artifact.repository.ArtifactRepository toArtifactRepository(RemoteRepository repository);

    MavenSession getMavenSession();

        ArtifactCoordinates coords2 = mock(ArtifactCoordinates.class);
        RemoteRepository repo1 = mock(RemoteRepository.class);
        RemoteRepository repo2 = mock(RemoteRepository.class);

        List<RemoteRepository> repositories1 = Arrays.asList(repo1, repo2);
        List<RemoteRepository> repositories2 = Arrays.asList(repo1, repo2);

    }

    public static List<RemoteRepository> toRepos(List<ArtifactRepository> repos) {
        return Optional.ofNullable(repos).orElse(Collections.emptyList()).stream()
                .map(RepositoryUtils::toRepo)
                .collect(Collectors.toList());
    }

    public static RemoteRepository toRepo(ArtifactRepository repo) {
        RemoteRepository result = null;
        if (repo != null) {

     * @throws IllegalArgumentException if the list contains null repository entries
     */
    default List<RemoteRepository> validate(List<RemoteRepository> repositories) {
        if (repositories == null) {
            return null;
        }
        HashSet<RemoteRepository> set = new HashSet<>(repositories);
        if (repositories.size() != set.size()) {
            throw new IllegalArgumentException(

        while (iterator.hasNext()) {
            RemoteRepository remoteRepository = iterator.next();
            if (remoteRepository.getId().equals(id)) {
                iterator.remove();
            }
        }
    }

    @Override
    public ModelResolver newCopy() {
        return new DefaultModelResolver(this);
    }

    @Override