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