}

    public ArtifactVersion getSelectedVersion(Artifact artifact) throws OverConstrainedVersionException {
        ArtifactVersion version;
        if (recommendedVersion != null) {
            version = recommendedVersion;
        } else {
            if (restrictions.isEmpty()) {
                throw new OverConstrainedVersionException("The artifact has no valid ranges", artifact);
            }

        return optional;
    }

    @Override
    public ArtifactVersion getSelectedVersion() throws OverConstrainedVersionException {
        return versionRange.getSelectedVersion(this);
    }

    @Override
    public boolean isSelectedVersionKnown() throws OverConstrainedVersionException {
        return versionRange.isSelectedVersionKnown(this);
    }

    @Override