protected Artifact artifact;

    protected AbstractArtifactMetadata(Artifact artifact) {
        this.artifact = artifact;
    }

    public boolean storedInGroupDirectory() {
        return false;
    }

    public String getGroupId() {
        return artifact.getGroupId();
    }

    public String getArtifactId() {
        return artifact.getArtifactId();
    }

    }

    public ArtifactRepositoryMetadata(Artifact artifact, Versioning versioning) {
        super(createMetadata(artifact, versioning));
        this.artifact = artifact;
    }

    public boolean storedInGroupDirectory() {
        return false;
    }

    public boolean storedInArtifactVersionDirectory() {
        return false;
    }

    public String getGroupId() {
        return artifact.getGroupId();
    }

    /**
     * Whether this metadata should be stored alongside the group.
     *
     * @return whether this metadata should be stored alongside the group
     */
    boolean storedInGroupDirectory();

    String getGroupId();

    String getArtifactId();

    String getBaseVersion();

    Object getKey();

    /**
     * Get the filename of this metadata on the local repository.

        StringBuilder path = new StringBuilder(128);

        path.append(formatAsDirectory(metadata.getGroupId())).append(PATH_SEPARATOR);
        if (!metadata.storedInGroupDirectory()) {
            path.append(metadata.getArtifactId()).append(PATH_SEPARATOR);

            if (metadata.storedInArtifactVersionDirectory()) {
                path.append(metadata.getBaseVersion()).append(PATH_SEPARATOR);

    public SnapshotArtifactRepositoryMetadata(Artifact artifact, Snapshot snapshot) {
        super(createMetadata(artifact, createVersioning(snapshot)));
        this.artifact = artifact;
    }

    public boolean storedInGroupDirectory() {
        return false;
    }

    public boolean storedInArtifactVersionDirectory() {
        return true;
    }

    public String getGroupId() {
        return artifact.getGroupId();
    }

    private final String groupId;

    public GroupRepositoryMetadata(String groupId) {
        super(new Metadata());
        this.groupId = groupId;
    }

    public boolean storedInGroupDirectory() {
        return true;
    }

    public boolean storedInArtifactVersionDirectory() {
        return false;
    }

    public String getGroupId() {
        return groupId;
    }

        return merged;
    }

    public String getGroupId() {
        return emptify(metadata.getGroupId());
    }

    public String getArtifactId() {
        return metadata.storedInGroupDirectory() ? "" : emptify(metadata.getArtifactId());
    }

    public String getVersion() {
        return metadata.storedInArtifactVersionDirectory() ? emptify(metadata.getBaseVersion()) : "";
    }

            this.metadata = metadata;
        }

        public boolean storedInArtifactVersionDirectory() {
            return !metadata.getVersion().isEmpty();
        }

        public boolean storedInGroupDirectory() {
            return metadata.getArtifactId().isEmpty();
        }

        public String getGroupId() {
            return nullify(metadata.getGroupId());
        }