Implement findMatchedOrders which will handle buy and sell orders

src/Order.java

@@ -3,7 +3,7 @@
  * for both SellTrade and BuyTrade classes that will inherit 
  * for it.
  */
-public abstract class Order {
+public class Order {
 	private int qty;
 	private float price;
 	private int time;

src/OrderMatching.java

@@ -12,6 +12,14 @@ public class OrderMatching {
 		return order.getQty() > 0 && order.getPrice() > 0.0;
 	}
 	
+	/*
+	 * General method to handle both BuyOrder and SellOrder
+	 */
+	ArrayList<Order> findMatchedOrders(Order o) {
+		return (o.getType() == "SELL") 
+						? findBuyOrders((SellOrder) o) 
+						: findSellOrders((BuyOrder) o);
+	}
 	/*
 	 * Checks if trade can happen between buy order and
 	 * sell order
@@ -25,8 +33,8 @@ public class OrderMatching {
 	/*
 	 * Finds all buy orders for current sell order
 	 */
-	ArrayList<BuyOrder> findBuyOrders(SellOrder s) {
-		ArrayList<BuyOrder> matchedOrders = new ArrayList<>();
+	ArrayList<Order> findBuyOrders(SellOrder s) {
+		ArrayList<Order> matchedOrders = new ArrayList<>();
 		
 		// Iterate over buy orders queue
 		for (BuyOrder b : buyOrderQueue) {
@@ -67,7 +75,7 @@ public class OrderMatching {
 		
 		// remove all buy orders that were matched from
 		// buy order queue
-		for (BuyOrder b : matchedOrders) {
+		for (Order b : matchedOrders) {
 			buyOrderQueue.remove(b);
 		}
 		
@@ -77,8 +85,8 @@ public class OrderMatching {
 	/*
 	 * Finds all sell orders for current buy order
 	 */
-	ArrayList<SellOrder> findSellOrders(BuyOrder b) {
-		ArrayList<SellOrder> matchedOrders = new ArrayList<>();
+	ArrayList<Order> findSellOrders(BuyOrder b) {
+		ArrayList<Order> matchedOrders = new ArrayList<>();
 		
 		// Iterate over sell orders queue
 		for (SellOrder s : sellOrderQueue) {
@@ -119,7 +127,7 @@ public class OrderMatching {
 		
 		// remove all sell orders that were matched from
 		// sell order queue
-		for (SellOrder s : matchedOrders) {
+		for (Order s : matchedOrders) {
 			sellOrderQueue.remove(s);
 		}