code: public static boolean compare(Oid lhs, Oid rhs) {
  		if (lhs == null || rhs == null)
  			return (lhs == rhs);
  		return lhs.equals(rhs);
  	}
docs: Compare two oids
  @param lhs - left hand side
  @param rhs - right hand side
  @return true if these are equal; false otherwise