private boolean blocked;

    /**
     * Create a local repository or a test repository.
     *
     * @param id     the unique identifier of the repository
     * @param url    the URL of the repository
     * @param layout the layout of the repository
     */
    public DefaultArtifactRepository(String id, String url, ArtifactRepositoryLayout layout) {

        for (ArtifactRepository repository : remoteRepositories) {
            ArtifactRepositoryPolicy policy = metadata.getPolicy(repository);

            if (policy.isEnabled() && loadMetadata(metadata, repository, localRepository, previousMetadata)) {
                metadata.setRepository(repository);
                selected = repository;
            }
        }

import org.apache.maven.artifact.InvalidRepositoryException;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.ArtifactRepositoryFactory;
import org.apache.maven.model.DeploymentRepository;
import org.apache.maven.model.Repository;
import org.apache.maven.plugin.LegacySupport;
import org.apache.maven.repository.RepositorySystem;
import org.codehaus.plexus.PlexusContainer;

                                + " (" + repository.getUrl() + ")");
            }

            return false;
        }

        if (getLogger().isDebugEnabled()) {
            getLogger()
                    .debug("Determining update check for " + artifact + " (" + file + ") from " + repository.getId()
                            + " (" + repository.getUrl() + ")");
        }

    Object getKey();

    /**
     * Get the filename of this metadata on the local repository.
     *
     * @param repository the remote repository it came from
     * @return the filename
     */
    String getLocalFilename(ArtifactRepository repository);

    /**
     * Get the filename of this metadata on the remote repository.
     *
     * @return the filename
     */
    String getRemoteFilename();

    /**

     * identifier are added, only the first repository being added will be used.
     *
     * @param repository The repository to add to the internal search chain, must not be {@code null}.
     * @throws InvalidRepositoryException If the repository could not be added (e.g. due to invalid URL or layout).
     */
    void addRepository(Repository repository) throws InvalidRepositoryException;

    /**

        Set<String> repoIds = new HashSet<>();

        for (Repository repository : repositories) {
            validateStringNotEmpty(problems, prefix + ".id", repository.getId(), repository.getUrl());

            validateBannedCharacters(
                    problems, prefix + ".id", Severity.WARNING, repository.getId(), null, ILLEGAL_REPO_ID_CHARS);

    }

    public static RemoteRepository toRemoteRepository(Repository repository) {
        RemoteRepository.Builder builder =
                new RemoteRepository.Builder(repository.getId(), repository.getLayout(), repository.getUrl());
        builder.setSnapshotPolicy(toRepositoryPolicy(repository.getSnapshots()));
        builder.setReleasePolicy(toRepositoryPolicy(repository.getReleases()));
        return builder.build();
    }

     * @param localRepository    local repository
     * @param remoteRepository   remote repository
     * @return {@link List} $lt; {@link ArtifactVersion} >
     * @throws ArtifactMetadataRetrievalException
     *          in case of error while retrieving repository metadata from the repository.
     */
    List<ArtifactVersion> retrieveAvailableVersionsFromDeploymentRepository(

   |-->
  <mirrors>
    <!-- mirror
     | Specifies a repository mirror site to use instead of a given repository. The repository that
     | this mirror serves has an ID that matches the mirrorOf element of this mirror. IDs are used
     | for inheritance and direct lookup purposes, and must be unique across the set of mirrors.
     |
    <mirror>
      <id>mirrorId</id>
      <mirrorOf>repositoryId</mirrorOf>