OrderInterface.java

public interface OrderInterface  {

        /**
         * 
         * @param day the day of the week
         * @return true if the day is a weekend day (Saturday or Sunday)
         */
         public boolean isWeekend();

        /**
         * returns the beverage listed in the itemNo of the order, for example if
         * itemNo is 0 this method will return the first beverage in the order
         * Note: this method returns the shallow copy of the Beverage
         * 
         * @return the beverage listed in the itemNo of the order or null if there
         *         is no item in the order
         * 
         */
         public Beverage getBeverage(int itemNo);
        /**
         * adds coffee order to this order
         * @param bevName beverage name
         * @param size beverage size of type SIZE
         * @param extraShot true if the coffee beverage has extra shot , false otherwise
         * @param extraSyrup true if the coffee beverage has extra syrup , false otherwise
         */
        public void  addNewBeverage(
                                String bevName,
                                SIZE size,
                                boolean extraShot,
                                boolean extraSyrup);
        
        /**
         * adds alcohol order to this order
         * @param bevName beverage name
         * @param size beverage size
         */ 
        public void  addNewBeverage( String bevName,
                                                                SIZE size);
        
        /**
         * Adds the Smoothie beverage to this order
         * @param bevName beverage name
         * @param size beverage size
         * @param numOfFruits number of fruits added 
         * @param addPRotien true if protein is added, false otherwise
         */
        public void  addNewBeverage( String bevName,
                                SIZE size,
                                int numOfFruits,
                                boolean addPRotien);
        
        /**
         * Calculates and returns the total amount for this order
         * @return total amount for this order
         */
        public double calcOrderTotal();
        /**
         * returns the number of beverages of same type in an order
         * @param type the type of the beverage
         * @return number of beverages of type type in this order
         */
        public int findNumOfBeveType(TYPE type);
}