95 lines
2.2 KiB
Java
Executable File
95 lines
2.2 KiB
Java
Executable File
/**
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* A class to model an item (or set of items) in an
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* auction: a lot.
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*
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* @author David J. Barnes and Michael Kölling.
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* @version 2016.02.29
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*/
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public class Lot
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{
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// A unique identifying number.
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private final int number;
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// A description of the lot.
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private String description;
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// The current highest bid for this lot.
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private Bid highestBid;
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/**
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* Construct a Lot, setting its number and description.
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* @param number The lot number.
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* @param description A description of this lot.
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*/
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public Lot(int number, String description)
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{
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this.number = number;
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this.description = description;
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this.highestBid = null;
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}
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/**
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* Attempt to bid for this lot. A successful bid
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* must have a value higher than any existing bid.
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* @param bid A new bid.
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* @return true if successful, false otherwise
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*/
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public boolean bidFor(Bid bid)
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{
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if(highestBid == null) {
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// There is no previous bid.
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highestBid = bid;
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return true;
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}
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else if(bid.getValue() > highestBid.getValue()) {
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// The bid is better than the previous one.
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highestBid = bid;
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return true;
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}
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else {
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// The bid is not better.
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return false;
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}
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}
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/**
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* @return A string representation of this lot's details.
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*/
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public String toString()
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{
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String details = number + ": " + description;
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if(highestBid != null) {
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details += " Bid: " +
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highestBid.getValue();
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}
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else {
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details += " (No bid)";
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}
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return details;
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}
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/**
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* @return The lot's number.
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*/
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public int getNumber()
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{
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return number;
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}
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/**
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* @return The lot's description.
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*/
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public String getDescription()
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{
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return description;
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}
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/**
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* @return The highest bid for this lot.
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* This could be null if there is
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* no current bid.
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*/
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public Bid getHighestBid()
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{
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return highestBid;
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}
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}
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