Path path = artifactManager.getPath(artifact).orElse(null);
                if (path != null) {
                    paths.put(artifact, path);
                } else {
                    requests.add(new ArtifactRequest(aetherArtifact, repositories, null));
                }
            }
            if (!requests.isEmpty()) {
                List<ArtifactResult> results =

        if (getSource() != null && !getSource().isEmpty()) {
            buffer.append(getSource());
        }
        if (getLineNumber() > 0) {
            if (!buffer.isEmpty()) {
                buffer.append(", ");
            }
            buffer.append("line ").append(getLineNumber());
        }
        if (getColumnNumber() > 0) {
            if (!buffer.isEmpty()) {

            StringBuilder sb = new StringBuilder();
            if (groupId != null) {
                sb.append(groupId);
            }
            sb.append(":");
            if (artifactId != null) {
                sb.append(artifactId);
            }
            sb.append(":");
            if (version != null) {
                sb.append(version);
            }

            InternalSession session, LocalRepository local) {
        org.eclipse.aether.repository.LocalRepository repository = session.toRepository(local);
        if ("enhanced".equals(repository.getContentType())) {
            repository = new org.eclipse.aether.repository.LocalRepository(repository.getBasePath(), "");
        }

 * of sessions, use {@link CloseableSession#close()} method on built instance(s).
 * <p>
 * Extend this class and override methods to customize, if needed.
 *
 * @since 4.0.0
 */
public class MavenSessionBuilderSupplier implements Supplier<SessionBuilder> {
    protected final RepositorySystem repositorySystem;
    protected final InternalScopeManager scopeManager;

        String checksumPolicy = RepositoryPolicy.CHECKSUM_POLICY_FAIL;
        if (policy != null) {
            enabled = policy.isEnabled();
            if (policy.getUpdatePolicy() != null) {
                updatePolicy = policy.getUpdatePolicy();
            }
            if (policy.getChecksumPolicy() != null) {
                checksumPolicy = policy.getChecksumPolicy();
            }
        }

        if (Files.isRegularFile(source)) {
            throw new IllegalArgumentException("source file does not exist or is not a file");
        }
        if (relativeTarget.isAbsolute()) {
            throw new IllegalArgumentException("Supplied URI is not relative");
        }
        URI target = baseURI.resolve(relativeTarget);

   *
   * @throws IllegalArgumentException if the stream consists of two or more elements.
   * @throws NullPointerException if any element in the stream is {@code null}.
   * @return {@code Optional.of(onlyElement)} if the stream has exactly one element (must not be
   *     {@code null}) and returns {@code Optional.empty()} if it has none.
   */
  @SuppressWarnings("unchecked")

            throws ModelResolverException {
        try {
            ArtifactCoordinate coord = session.createArtifactCoordinate(groupId, artifactId, version, "pom");
            if (coord.getVersion().getVersionRange() != null
                    && coord.getVersion().getVersionRange().getUpperBoundary() == null) {
                // Message below is checked for in the MNG-2199 core IT.

    @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) {