class ArtifactStatus implements Comparable<ArtifactStatus> {
    /**
     * No trust - no information about status.
     */
    public static final ArtifactStatus NONE = new ArtifactStatus("none", 0);

    /**
     * No trust - information was generated with defaults.
     */
    public static final ArtifactStatus GENERATED = new ArtifactStatus("generated", 1);

    /**
     * Low trust - was converted from the Maven 1.x repository.
     */
    public static final ArtifactStatus CONVERTED = new ArtifactStatus("converted", 2);

    /**
     * Moderate trust - it was deployed directly from a partner.
     */
    public static final ArtifactStatus PARTNER = new ArtifactStatus("partner", 3);

    /**
     * Moderate trust - it was deployed directly by a user.
     */
    public static final ArtifactStatus DEPLOYED = new ArtifactStatus("deployed", 4);

    /**
     * Trusted, as it has had its data verified by hand.
     */
    public static final ArtifactStatus VERIFIED = new ArtifactStatus("verified", 5);

    private final int rank;

    private final String key;

    private static Map<String, ArtifactStatus> map;

    private ArtifactStatus(String key, int rank) {
        this.rank = rank;
        this.key = key;

        if (map == null) {
            map = new HashMap<>();
        }
        map.put(key, this);
    }

    public static ArtifactStatus valueOf(String status) {<FILL_FUNCTION_BODY>}

    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        final ArtifactStatus that = (ArtifactStatus) o;

        return rank == that.rank;
    }

    public int hashCode() {
        return rank;
    }

    public String toString() {
        return key;
    }

    public int compareTo(ArtifactStatus s) {
        return rank - s.rank;
    }
}

        ArtifactStatus retVal = null;

        if (status != null) {
            retVal = map.get(status);
        }

        return retVal != null ? retVal : NONE;
    
<no_super_class>