public int compareTo(final OIdentifiable iOther) {
if (iOther == this) return 0;
if (iOther == null) return 1;
final int otherClusterId = iOther.getIdentity().getClusterId();
if (clusterId == otherClusterId) {
final OClusterPosition otherClusterPos = iOther.getIdentity().getClusterPosition();
return clusterPosition.compareTo(otherClusterPos);
} else if (clusterId > otherClusterId) return 1;
return -1;
}
