001package scpc.model;
002
003import java.io.Serializable;
004import java.util.Objects;
005
006/**
007 * Represent current visit item as bonus.
008 * <br>表示當下走访的品項就是優惠品項
009 *
010 * @author Kent Yeh
011 */
012public class CurrentItem implements IItem {
013
014    private static final CurrentItem CI = new CurrentItem();
015
016    public static CurrentItem getInstance() {
017        return CI;
018    }
019
020    private CurrentItem() {
021    }
022
023    @Override
024    public Serializable getIdentity() {
025        return "CurrentItem";
026    }
027
028    @Override
029    public CurrentItem as() {
030        return this;
031    }
032
033    @Override
034    public long getQuantity() {
035        return 1;
036    }
037
038    @Override
039    public void setQuantity(long quantity) {
040
041    }
042
043    @Override
044    public double getSalePrice() {
045        return 0;
046    }
047
048    @Override
049    public double getRegularPrice() {
050        return 0;
051    }
052
053    @Override
054    public boolean equals(Object obj) {
055        if (this == obj) {
056            return true;
057        }
058        if (obj == null) {
059            return false;
060        }
061        if (getClass() != obj.getClass()) {
062            return false;
063        }
064        final CurrentItem other = (CurrentItem) obj;
065        return Objects.equals(getIdentity(), other.getIdentity());
066    }
067
068    @Override
069    public int hashCode() {
070        return "6d0c40fb-e3a1-49d7-bcfd-b60efb0f08d0".hashCode();
071    }
072
073    public static boolean isCurrent(Object obj) {
074        return CI.hashCode() == obj.hashCode();
075    }
076
077}