import org.apache.maven.artifact.resolver.ArtifactNotFoundException;
import org.apache.maven.artifact.resolver.ArtifactResolutionException;
import org.apache.maven.artifact.resolver.ArtifactResolutionRequest;
import org.apache.maven.artifact.resolver.ArtifactResolutionResult;
import org.apache.maven.artifact.resolver.MultipleArtifactsNotFoundException;
import org.apache.maven.artifact.resolver.ResolutionErrorHandler;

     * @see ArtifactResolver#resolve(ArtifactResolverRequest)
     */
    DependencyResolverResult resolve(DependencyResolverRequest request)
            throws DependencyCollectorException, DependencyResolverException, ArtifactResolverException;

    @Nonnull
    default DependencyResolverResult resolve(@Nonnull Session session, @Nonnull Project project) {
        return resolve(DependencyResolverRequest.build(session, project));

    /**
     * Collects the transitive dependencies and builds a dependency graph.
     * Note that this operation is only concerned about determining the coordinates of the
     * transitive dependencies and does not actually resolve the artifact files.
     *
     * @param request the dependency collection request, must not be {@code null}
     * @return the collection result, never {@code null}

     * @return The resolved plugin artifact, never {@code null}.
     * @throws PluginResolutionException If the plugin artifact could not be resolved.
     */
    Artifact resolve(Plugin plugin, List<RemoteRepository> repositories, RepositorySystemSession session)
            throws PluginResolutionException;

    /**
     * Resolves the runtime dependencies of the specified plugin.
     *

     * @param artifactCoordinate The artifact coordinate for which the version needs to be resolved, must not be {@code null}
     * @return The version result, never {@code null}.
     * @throws VersionResolverException If the metaversion could not be resolved.
     */
    @Nonnull
    default VersionResolverResult resolve(@Nonnull Session session, @Nonnull ArtifactCoordinate artifactCoordinate)

import org.apache.maven.api.annotations.Nonnull;
import org.apache.maven.api.annotations.Nullable;

import static org.apache.maven.api.services.BaseRequest.nonNull;

/**
 * A Source specific to load POMs.  The {@link #resolve(ModelLocator, String)} method
 * will be used to find POMs for children modules.
 *
 * @since 4.0.0
 */
public interface ModelSource extends Source {

    interface ModelLocator {
        /**

@Named
public class DefaultRootLocator implements RootLocator {

    public boolean isRootDirectory(Path dir) {
        if (Files.isDirectory(dir.resolve(".mvn"))) {
            return true;
        }
        // we're too early to use the modelProcessor ...
        Path pom = dir.resolve("pom.xml");
        try (InputStream is = Files.newInputStream(pom)) {
            XMLStreamReader parser = new WstxInputFactory().createXMLStreamReader(is);

import static org.apache.maven.internal.impl.Utils.nonNull;

@Named
@Singleton
public class DefaultArtifactResolver implements ArtifactResolver {

    @Override
    public ArtifactResolverResult resolve(ArtifactResolverRequest request)
            throws ArtifactResolverException, IllegalArgumentException {
        nonNull(request, "request");
        InternalSession session = InternalSession.from(request.getSession());

     *             parameter {@code coordinate} is {@code null} or invalid
     */
    default ArtifactResolverResult resolve(Session session, Collection<? extends ArtifactCoordinate> coordinates) {
        return resolve(ArtifactResolverRequest.build(session, coordinates));
    }

                    && RepositoryUtils.repositoriesEquals(repositories, that.repositories)
                    && Objects.equals(collect, that.collect)
                    && Objects.equals(resolve, that.resolve)
                    && aggregating == that.aggregating;
        }
    }

    protected final Map<Key, CacheRecord> cache = new ConcurrentHashMap<>();