}

            if (!plugin.isExtensions()
                    && artifacts.size() == 1
                    && artifacts.get(0).getFile() != null) {
                /*
                 * This is purely for backward-compat with 2.x where <extensions> consisting of a single artifact where

    public String getType() {
        return metadata.getRemoteFilename();
    }

    private String emptify(String string) {
        return (string != null) ? string : "";
    }

    @Override
    public File getFile() {
        return null;
    }

    @Override
    public MetadataBridge setFile(File file) {
        return this;
    }

    @Override
    public Path getPath() {
        return null;

            boolean v4api = foreignImports != null && foreignImports.containsValue(maven4ApiRealm);
            for (Artifact artifact : artifacts) {
                if (!isProvidedArtifact(artifact, v4api) && artifact.getFile() != null) {
                    constituents.add(new ArtifactClassRealmConstituent(artifact));
                } else if (logger.isDebugEnabled()) {
                    logger.debug("  Excluded: {}", getId(artifact));

        if (!Features.consumerPom(session.getConfigProperties())) {
            try {
                Model model = read(project.getFile().toPath());
                String version = model.getVersion();
                if (version == null && model.getParent() != null) {
                    version = model.getParent().getVersion();
                }

            } catch (InvalidVersionSpecificationException e) {
                throw new InvalidDependencyVersionException(project.getId(), d, project.getFile(), e);
            }

            if (dependencyArtifact != null) {
                artifacts.add(dependencyArtifact);
            }
        }

        return artifacts;
    }

    @Override
    public Model getModel() {
        return project.getModel().getDelegate();
    }

    @Nonnull
    @Override
    public Path getPomPath() {
        return Objects.requireNonNull(project.getFile(), "pomPath cannot be null")
                .toPath();
    }

    @Nonnull
    @Override
    public Path getBasedir() {
        return Objects.requireNonNull(project.getBasedir(), "basedir cannot be null")

    @Override
    public String getType() {
        return type;
    }

    @Override
    public void setFile(File file) {
        this.file = file;
    }

    @Override
    public File getFile() {
        return file;
    }

    @Override
    public ArtifactRepository getRepository() {
        return repository;
    }

    @Override

                org.eclipse.aether.graph.Dependency dep = RepositoryUtils.toDependency(artifact, exclusions);
                if (!DependencyScope.SYSTEM.is(dep.getScope())
                        && dep.getArtifact().getFile() != null) {
                    // enable re-resolution
                    org.eclipse.aether.artifact.Artifact art = dep.getArtifact();
                    art = art.setFile(null).setVersion(art.getBaseVersion());

        // only show msg if a change is actually taking place
        if (!replacement.getScope().equals(artifact.getScope())) {
            String msg = indent + artifact + " (applying system path: " + replacement.getFile() + ")";
            logger.debug(msg);
        }
    }

                if (pomFiles == null) {
                    pomFiles = new ArrayList<>(Arrays.asList(collision.getFile(), project.getFile()));
                    collisions.put(projectId, pomFiles);
                } else {
                    pomFiles.add(project.getFile());
                }
            }
        }

        if (!collisions.isEmpty()) {