ArtifactHandler handler = null;

        if (artifactType != null) {
            handler = artifactHandlerManager.getArtifactHandler(artifactType);
        }

        if (handler == null) {
            handler = artifactHandlerManager.getArtifactHandler("jar");
        }

        Artifact artifact = new AttachedArtifact(project.getArtifact(), artifactType, artifactClassifier, handler);

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);

    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()) {

        }
        for (Artifact a : getArtifacts()) {
            final File f = a.getFile();
            if (f != null && scopeFilter.test(a.getScope())) {
                final ArtifactHandler h = a.getArtifactHandler();
                if (h.isAddedToClasspath()) {
                    list.add(f.getPath());
                }
            }
        }
        return list;
    }

    /**

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

        return result;
    }

            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,

    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);

    @Deprecated
    public void install(String basedir, String finalName, Artifact artifact, ArtifactRepository localRepository)
            throws ArtifactInstallationException {
        String extension = artifact.getArtifactHandler().getExtension();
        File source = new File(basedir, finalName + "." + extension);

        install(source, artifact, localRepository);
    }

    }

    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())

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

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

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

    /** {@inheritDoc} */