/* (non-Javadoc)
* @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
*/
public int compare(Object a, Object b) throws ClassCastException {
if (a == null) {
return -1;
} else if (b == null) {
return 1;
} else if (a == null && b == null) {
return 0;
} else {
MessageAsk aska = (MessageAsk) a;
MessageAsk askb = (MessageAsk) b;
Double d_c1 = new Double(aska.getPrice());
Double d_c2 = new Double(askb.getPrice());
return d_c1.compareTo(d_c2);
}
}
/**
* Called when a bid is received.
*
* @param bid the bid received by the auctioneer
*/
public void onReceiveBid(MessageBid bid) {
synchronized (syncObj) {
Collections.sort(asks, compAsks);
if (asks.size() > 0) {
MessageAsk ask = (MessageAsk) asks.getFirst();
double priceAsk = ask.getPrice();
double priceBid = bid.getPrice();
if (priceBid >= priceAsk) {
double finalPrice = (priceAsk + priceBid) / 2;
super.match(ask, bid, finalPrice);
asks.remove(ask);
} else {
bids.add(bid);
}
} else {
bids.add(bid);
}
}
}