public String getId() {
        return "default";
    }

    public String pathOf(Artifact artifact) {
        ArtifactHandler artifactHandler = artifact.getArtifactHandler();

        StringBuilder path = new StringBuilder(128);

        path.append(formatAsDirectory(artifact.getGroupId())).append(PATH_SEPARATOR);
        path.append(artifact.getArtifactId()).append(PATH_SEPARATOR);

    public void setDependencyFilter(ArtifactFilter artifactFilter) {
        artifact.setDependencyFilter(artifactFilter);
    }

    /** {@inheritDoc} */
    public ArtifactHandler getArtifactHandler() {
        return artifact.getArtifactHandler();
    }

    /** {@inheritDoc} */
    public List<String> getDependencyTrail() {
        return artifact.getDependencyTrail();
    }

    /** {@inheritDoc} */

import java.util.Map;

import org.apache.maven.artifact.handler.ArtifactHandler;

/**
 */
public interface ArtifactHandlerManager {
    String ROLE = ArtifactHandlerManager.class.getName();

    ArtifactHandler getArtifactHandler(String type);

    @Deprecated
    void addHandlers(Map<String, ArtifactHandler> handlers);

            if (executionEvent.getType() == ExecutionEvent.Type.SessionEnded) {
                allHandlers.clear();
            }
        }
    }

    @Override
    public ArtifactHandler getArtifactHandler(String id) {
        return allHandlers.computeIfAbsent(id, k -> {
            Type type = typeRegistry.require(id);
            return new DefaultArtifactHandler(
                    id,

                artifact.getArtifactId(),
                artifact.getClassifier(),
                artifact.getArtifactHandler().getExtension(),
                version,
                props,
                newArtifactType(artifact.getType(), artifact.getArtifactHandler()));
        result = result.setFile(artifact.getFile());

        return result;
    }

    private static final char GROUP_SEPARATOR = '.';

    public String getId() {
        return "flat";
    }

    public String pathOf(Artifact artifact) {
        ArtifactHandler artifactHandler = artifact.getArtifactHandler();

        StringBuilder path = new StringBuilder(128);

        path.append(artifact.getArtifactId()).append(ARTIFACT_SEPARATOR).append(artifact.getVersion());

        if (artifact.hasClassifier()) {

            if (executionEvent.getType() == ExecutionEvent.Type.SessionEnded) {
                allHandlers.clear();
            }
        }
    }

    public ArtifactHandler getArtifactHandler(String type) {
        requireNonNull(type, "null type");
        ArtifactHandler handler = allHandlers.get(type);
        if (handler == null) {
            handler = artifactHandlers.get(type);

    }

    private String id(org.apache.maven.artifact.Artifact artifact) {
        return artifact.getGroupId()
                + ":" + artifact.getArtifactId()
                + ":" + artifact.getArtifactHandler().getExtension()
                + (artifact.getClassifier() == null || artifact.getClassifier().isEmpty()
                        ? ""
                        : ":" + artifact.getClassifier())

    String getDownloadUrl();

    void setDownloadUrl(String downloadUrl);

    ArtifactFilter getDependencyFilter();

    void setDependencyFilter(ArtifactFilter artifactFilter);

    ArtifactHandler getArtifactHandler();

    List<String> getDependencyTrail();

    void setDependencyTrail(List<String> dependencyTrail);

    void setScope(String scope);

    VersionRange getVersionRange();

            Type type = types.get(id);
            if (type == null) {
                // Copy data as the ArtifactHandler is not immutable, but Type should be.
                ArtifactHandler handler = manager.getArtifactHandler(id);
                type = new DefaultType(
                        id,
                        languageRegistry.lookup(handler.getLanguage()).orElseGet(() -> handler::getLanguage),