/**
* This method is mainly to cancel replace an order. We find the original order in the books, then
* we renew its information. then we push it back to the financial.book as a new order.
*/
public String cxrOrder(OrderCxRImpl changeOrder) {
// get the id of the cancel replace order
String orderID = changeOrder.getOrderId();
// find the order in the financial.book
NewOrderImpl renewOrder = lookUpOrder(orderID);
// renew the order, then push it back into the financial.book as a new order
String orderSymbol = renewOrder.getSymbol();
if (renewOrder != null && changeOrder.getSize() != 0) {
// renew the size of the order
renewOrder.size = changeOrder.getSize();
// renew the price of the order
renewOrder.limitPrice = changeOrder.getLimitPrice();
// get the bidbook and askbook of that certain symbol
Hashtable<Double, LinkedList<NewOrderImpl>> tempbid =
new Hashtable<Double, LinkedList<NewOrderImpl>>();
Hashtable<Double, LinkedList<NewOrderImpl>> tempask =
new Hashtable<Double, LinkedList<NewOrderImpl>>();
if (bid.containsKey(orderSymbol)) {
tempbid = bid.get(orderSymbol);
}
if (ask.containsKey(orderSymbol)) {
tempask = ask.get(orderSymbol);
}
// add the changed order back to the books.
addNewOrder(renewOrder, orderSymbol, tempbid, tempask);
}
// return the symbol of the cancel and replace order.
return orderSymbol;
}
/**
* This result method is to get all things done by using the method build above. It get all the
* orders and deal with them. Every time right after one oder has been solved, it will print out
* the best bid price and ask price for the name that the message belonged to.
*/
public static void result(Iterator<Message> myiter, Boolean flag) {
// get a new book
book book = new book();
// this recursion will not end until the mylist is empty.
while (myiter.hasNext()) {
// if the next item in mylist is a new Order.
Object mymessage = myiter.next();
// be prepared to get the certain bidbook and askbook
Hashtable<Double, LinkedList<NewOrderImpl>> tempbid =
new Hashtable<Double, LinkedList<NewOrderImpl>>();
Hashtable<Double, LinkedList<NewOrderImpl>> tempask =
new Hashtable<Double, LinkedList<NewOrderImpl>>();
// if the next item is a new order
if (mymessage instanceof NewOrderImpl) {
// make the order a NewOrderImpl
NewOrderImpl myneworder = (NewOrderImpl) mymessage;
// get the symbol of the order
String mysymbol = myneworder.getSymbol();
// if the bidbook of the symbol is already built, fetch the bidbook
if (bid.containsKey(mysymbol)) {
tempbid = bid.get(mysymbol);
}
// if the askbook of the symbol is already build, fetch the askbook
if (ask.containsKey(mysymbol)) {
tempask = ask.get(mysymbol);
}
// add the new order into the books.
book.addNewOrder(myneworder, mysymbol, tempbid, tempask);
// if the flag is true, print out the information
if (flag) {
// if there is no bid orders in that bidbook, return Double.MIN_VALUE, and print out that
// there is no bid orders.
if (book.getHighestBid(tempbid) == Double.MIN_VALUE)
System.out.println(mysymbol + " Best Bid Price: no bid orders");
// else print out the best bid price
else System.out.println(mysymbol + " Best Bid Price: " + book.getHighestBid(tempbid));
// if there is no ask orders in that askbook, return Double.MAX_VALUE, and print out that
// there is no ask orders.
if (book.getLowestAsk(tempask) == Double.MAX_VALUE)
System.out.println(mysymbol + " Best Ask Price: no ask orders");
// else print out the best ask price
else System.out.println(mysymbol + " Best Ask Price: " + book.getLowestAsk(tempask));
}
}
// if the next item in mylist is a Order CxR.
else if (mymessage instanceof OrderCxRImpl) {
// make the item a OrderCxRImpl, then use the cxrOrder method to deal the order, and get its
// symbol
String mysymbol = book.cxrOrder((OrderCxRImpl) mymessage);
// fetch the bidbook and askbook of that symbol
tempbid = bid.get(mysymbol);
tempask = ask.get(mysymbol);
// if the flag is true, print out the information
if (flag) {
// if there is no bid orders in that bidbook, return Double.MIN_VALUE, and print out that
// there is no bid orders.
if (book.getHighestBid(tempbid) == Double.MIN_VALUE)
System.out.println(mysymbol + " Best Bid Price: no bid orders");
// else print out the best bid price
else System.out.println(mysymbol + " Best Bid Price: " + book.getHighestBid(tempbid));
// if there is no ask orders in that askbook, return Double.MAX_VALUE, and print out that
// there is no ask orders.
if (book.getLowestAsk(tempask) == Double.MAX_VALUE)
System.out.println(mysymbol + " Best Ask Price: no ask orders");
// else print out the best ask price
else System.out.println(mysymbol + " Best Ask Price: " + book.getLowestAsk(tempask));
}
}
}
}