module StockObjects {

 	struct Quote {
        string symbol;              // The stock symbol of this quote.
 		long long at_time; 			// Time at which the price was updated.
 		double price; 				// The current price of the stock.
 		long volume; 				// The volume of shares traded.
 	};

    exception Unknown{};

    interface Stock {
    
        // Returns the current stock quote.
 		Quote get_quote() raises(Unknown);

        // Sets the current stock quote.
 		void set_quote(in Quote stock_quote);

 		// Provides the stock description, e.g. company name.
 		readonly attribute string description;

    };

    interface StockFactory {
        Stock create_stock(
            in string symbol,
            in string description
        );
    };
		
    
};	// end of module StockObjects