001    package market.statistics;
002    
003    import java.util.Calendar;
004    
005    import market.Conversions;
006    import market.SMarket;
007    
008    public class PriceHistoryEntry extends HistoryEntry {
009    
010        private boolean changeInMorning;
011    
012        public PriceHistoryEntry(Calendar date, int value) {
013            super(date, value);
014            this.changeInMorning = !SMarket.isOpen() && SMarket.hasTimeAdvanced();
015        }
016    
017    
018        /**
019         * Returns if an Entry is privsional or not. An entry is provisional (and can therefore be replaced) if
020         * <ul>
021         *   <li>it has been created in the morning before the market opened. The market hasn't opened and
022         *          the date hasn't advanced since then, that means, it is still the same morning since the
023         *          last price change.</li>
024         *   <li>it has been created in the evening after the market closed, and this evening has not yet
025         *          passed by, that means, it is still the same evening since the last price change.</li>
026         *   <li>it has been created in the evening after the market closed, but now is the following morning and
027         *          the market hasn't opened yet.</li>
028         * </ul>
029         *
030         * @return if an Entry is provisional or not.
031         */
032        public boolean isProvisional() {
033            return (((Conversions.dayDifference(date, SMarket.getTime()) == 0) &&
034                    changeInMorning && SMarket.hasTimeAdvanced()) //created this morning, still morning
035                    ||
036                    ((Conversions.dayDifference(SMarket.getTime(), date) == 1) &&
037                    !changeInMorning && !SMarket.hasTimeAdvanced()) //created this evening, still evening
038                    ||
039                    (Conversions.dayDifference(date, SMarket.getTime()) == 0 && //created yesterday, market not open
040                    !SMarket.isOpen() && SMarket.hasTimeAdvanced()));
041        }
042    }
043    
044