import java.util.Vector;                 // Java container class
import java.util.Date;                   // auto generate a date, convert to String 
public class Order {
  public int ORDER_NO;                   // primary key
  public String DATE;                    // date as a String
  public Account account;                // reference to parent
  public Stock stock;                    // reference to parent
  public String TYPE;                    // public visibility: same as a record struct
  public double PRICE;
  public int QTY;
  public static int base_order = 1000;   // static var to auto generate order numbers

  public Order(Account account, Stock stock, String TYPE, double PRICE, int QTY) {
    this.account = account; this.stock = stock; this.TYPE = TYPE; this.PRICE = PRICE; 
    this.QTY = QTY;
    ORDER_NO = base_order++;             // auto generate
    Date date = new Date();              // get date/time right now
    DATE = date.toString();              // store as a String
    account.orders.addElement(this);     // add itself to the parent's list of children
    if (TYPE.equals("SELL")) 
      stock.sellheap.put(this);          // add itself to it's parent's heap of orders
    else
      stock.buyheap.put(this);
  }
  public String toString() {
    return (ORDER_NO + " " + DATE + " " + account.ACCOUNT_NO + " " + stock.SYM + " " + TYPE + 
            " " + PRICE + " " + QTY);
  }
  public void remove() {
    account.orders.removeElement(this);  // remove itself when the QTY is consumed
  }
}