code: public static String getOperatorAsString(int op) {
  	switch(op) {
  	case EQ:
  	    return "=";
  	case NEQ:
  	    return "!=";
  	case GT:
  	    return ">";
  	case GTEQ:
  	    return ">=";
  	case LT:
  	    return "<";
  	case LTEQ:
  	    return "<=";
  	default: return "??";
  	}
      }
docs: Returns a string representation of the specified
  relation operator.
  
  @param op the relation operator
  @return the string representaion of the relation operator.