* The default implementation will look for a {@code .mvn} child directory
 * or a {@code pom.xml} containing the {@code root="true"} attribute.
 */
public interface RootLocator {

    String UNABLE_TO_FIND_ROOT_PROJECT_MESSAGE = "Unable to find the root directory. "
            + "Create a .mvn directory in the root directory or add the root=\"true\""
            + " attribute on the root project's model to identify it.";

    @Nonnull

    public UnknownRepositoryLayoutException(String repositoryId, String layoutId) {
        super("Cannot find ArtifactRepositoryLayout instance for: " + layoutId, repositoryId);
        this.layoutId = layoutId;
    }

    public UnknownRepositoryLayoutException(String repositoryId, String layoutId, ComponentLookupException e) {
        super("Cannot find ArtifactRepositoryLayout instance for: " + layoutId, repositoryId, e);
        this.layoutId = layoutId;

/**
 * LocalArtifactRepository
 */
@Deprecated
public abstract class LocalArtifactRepository extends MavenArtifactRepository {
    public static final String IDE_WORKSPACE = "ide-workspace";

    public abstract Artifact find(Artifact artifact);

    public abstract boolean hasLocalMetadata();

 here's what I do currently in the netbeans part of the mavenide project to
 find the relevant subprojects/sibling projects. I check if the user has
 defined the maven.multiproject.includes property in any of his properties
 files for the current project. if yes. then I'm able to find projects that
 can be offered to be opened together with the current project.
 problems with the current solution are:

import org.apache.maven.project.path.PathTranslator;
import org.codehaus.plexus.interpolation.Interpolator;
import org.codehaus.plexus.interpolation.RegexBasedInterpolator;

/**
 * Use a regular expression search to find and resolve expressions within the POM.
 *
 * TODO Consolidate this logic with the PluginParameterExpressionEvaluator, minus deprecations/bans.
 */
@Deprecated

    public UserLocalArtifactRepository(ArtifactRepository localRepository) {
        this.localRepository = localRepository;
        setLayout(localRepository.getLayout());
    }

    @Override
    public Artifact find(Artifact artifact) {
        File artifactFile = new File(localRepository.getBasedir(), pathOf(artifact));

        // We need to set the file here or the resolver will fail with an NPE, not fully equipped to deal

        DefaultSession session =
                new DefaultSession(ms, mock(RepositorySystem.class), Collections.emptyList(), null, null, null);

        assertEquals(
                RootLocator.UNABLE_TO_FIND_ROOT_PROJECT_MESSAGE,
                assertThrows(IllegalStateException.class, session::getRootDirectory)
                        .getMessage());
    }

    @Test
    void testRootDirectory() {

                boolean daemon = active.isDaemon();
                assertTrue(daemon, name + " is no daemon Thread.");
            }
        }

        assertTrue(seen, "Could not find ThreadGroup: " + DefaultArtifactResolver.DaemonThreadCreator.THREADGROUP_NAME);
    }

    @Test
    void testLookup() throws Exception {

    //
    /**
     *
     * @param artifact an artifact
     * @return found artifact
     * @since 3.0-alpha-3
     */
    Artifact find(Artifact artifact);

    /**
     * Finds the versions of the specified artifact that are available in this repository.
     *
     * @param artifact The artifact whose available versions should be determined, must not be {@code null}.

        ClassLoader cloader = Thread.currentThread().getContextClassLoader();

        URL resourceUrl = cloader.getResource(resource);

        if (resourceUrl == null) {
            throw new FileNotFoundException("Unable to find: " + resource);
        }

        return new File(resourceUrl.toURI());
    }

    protected ArtifactRepository getLocalRepository() throws Exception {