* Plugins can choose to report a warning to users when unresolved paths exist.
     */
    PathType UNRESOLVED = new PathType() {
        @Override
        public String name() {
            return "UNRESOLVED";
        }

        @Override
        public String id() {
            return "UNRESOLVED";
        }

        @Override

     */
    Optional<PathType> selectPathType(Set<PathType> types, Predicate<PathType> filter, Path path) throws IOException {
        PathType selected = null;
        boolean classes = false;
        boolean modules = false;
        boolean unknown = false;
        for (PathType type : types) {
            if (filter.test(type)) {

     */
    Optional<PathType> selectPathType(Set<PathType> types, Predicate<PathType> filter, Path path) throws IOException {
        PathType selected = null;
        boolean classes = false;
        boolean modules = false;
        boolean unknown = false;
        for (PathType type : types) {
            if (filter.test(type)) {

        Map<PathType, List<Path>> dispatched = session.resolveDependencies(
                coord, PathScope.TEST_COMPILE, Arrays.asList(JavaPathType.CLASSES, JavaPathType.MODULES));
        List<Path> classes = dispatched.get(JavaPathType.CLASSES);
        List<Path> modules = dispatched.get(JavaPathType.MODULES);
        List<Path> unresolved = dispatched.get(PathType.UNRESOLVED);

    private final boolean includesDependencies;
    private final Set<PathType> pathTypes;
    private final Map<String, String> properties;

    public DefaultType(
            String id,
            Language language,
            String extension,
            String classifier,
            boolean includesDependencies,
            PathType... pathTypes) {
        this.id = requireNonNull(id, "id");

    @Override
    public String toString() {
        return "PathType[" + id() + "]";
    }

    /**
     * Type of path which is applied to only one specific Java module.
     * The main case is the Java {@code --patch-module} option.
     *
     * @see #PATCH_MODULE
     * @see #patchModule(String)
     */
    public final class Modular implements PathType {
        /**

     * @see org.apache.maven.api.services.DependencyResolver#resolve(Session, Project, PathScope)
     */
    @Nonnull
    Map<PathType, List<Path>> resolveDependencies(
            @Nonnull DependencyCoordinate dependencyCoordinate,
            @Nonnull PathScope scope,
            @Nonnull Collection<PathType> desiredTypes);

    /**
     * Shortcut for {@code getService(DependencyResolver.class).resolve(...).getDispatchedPaths()}.

import org.apache.maven.api.Artifact;
import org.apache.maven.api.DependencyCoordinate;
import org.apache.maven.api.JavaPathType;
import org.apache.maven.api.PathScope;
import org.apache.maven.api.PathType;
import org.apache.maven.api.Project;
import org.apache.maven.api.Session;
import org.apache.maven.api.annotations.Experimental;
import org.apache.maven.api.annotations.Nonnull;

            }
        }
        addPathElement(cache.selectPathType(pathTypes, filter, path).orElse(PathType.UNRESOLVED), path);
    }

    /**
     * Returns whether the given set of path types contains at least one patch for a module.
     */
    private boolean containsPatches(Set<PathType> types) {
        for (PathType type : types) {
            if (type instanceof JavaPathType.Modular) {

                .resolve(this, project, scope)
                .getPaths();
    }

    @Override
    public Map<PathType, List<Path>> resolveDependencies(
            @Nonnull DependencyCoordinate dependency,
            @Nonnull PathScope scope,
            @Nonnull Collection<PathType> desiredTypes) {
        return getService(DependencyResolver.class)
                .resolve(DependencyResolverRequest.builder()