feat: add authors

ArrivalEvent.java

@@ -1,4 +1,8 @@
 
+/**
+ * @author Yadunand Prem
+ * @version CS2030S AY22/23 Semester 2
+ */
 class ArrivalEvent extends BaseShopEvent {
 
     double serviceTime;

BaseShopEvent.java

@@ -4,8 +4,8 @@
  * simulation. Your task is to replace this
  * class with new classes, following proper OOP principles.
  *
- * @author Wei Tsang
- * @version CS2030S AY21/22 Semester 2
+ * @author Yadunand Prem
+ * @version CS2030S AY22/23 Semester 2
  */
 
 abstract class BaseShopEvent extends Event {

Customer.java

@@ -1,3 +1,7 @@
+/**
+ * @author Yadunand Prem
+ * @version CS2030S AY22/23 Semester 2
+ */
 public class Customer {
     final private int id;
 

DepartureEvent.java

@@ -1,4 +1,7 @@
-
+/**
+ * @author Yadunand Prem
+ * @version CS2030S AY22/23 Semester 2
+ */
 class DepartureEvent extends BaseShopEvent {
 
     public DepartureEvent(double time, Customer customer, Shop shop) {

Event.java

@@ -1,16 +1,16 @@
 /**
- * The Event class is an abstract class that encapsulates a 
- * discrete event to be simulated. An event encapsulates the 
- * time the event occurs. A subclass of event _must_ override 
- * the simulate() method to implement the logic of the 
+ * The Event class is an abstract class that encapsulates a
+ * discrete event to be simulated. An event encapsulates the
+ * time the event occurs. A subclass of event _must_ override
+ * the simulate() method to implement the logic of the
  * simulation when this event is simulated. The simulate method
- * returns an array of events, which the simulator will then 
- * add to the event queue. Note that an event also implements 
- * the Comparable interface so that a PriorityQueue can 
+ * returns an array of events, which the simulator will then
+ * add to the event queue. Note that an event also implements
+ * the Comparable interface so that a PriorityQueue can
  * arrange the events in the order of event time.
- *
- * @author Wei Tsang
- * @version CS2030S AY21/22 Semester 2
+ * 
+ * @author Yadunand Prem
+ * @version CS2030S AY22/23 Semester 2
  */
 abstract class Event implements Comparable<Event> {
   /** The time this event occurs in the simulation. */
@@ -38,8 +38,8 @@ abstract class Event implements Comparable<Event> {
    * Compare this event with a given event e.
    *
    * @param e The other event to compare to.
-   * @return 1 if this event occurs later than e; 
-   *         0 if they occur the same time; 
+   * @return 1 if this event occurs later than e;
+   *         0 if they occur the same time;
    *         -1 if this event occurs earlier.
    */
   @Override

Lab1.java

@@ -3,8 +3,8 @@ import java.util.Scanner;
 /**
  * The main class for CS2030S Lab 1.
  *
- * @author Wei Tsang
- * @version CS2030S AY21/22 Semester 2
+ * @author Yadunand Prem
+ * @version CS2030S AY22/23 Semester 2
  */
 class Lab1 {
   public static void main(String[] args) {
@@ -12,8 +12,8 @@ class Lab1 {
     // Create a scanner to read from standard input.
     Scanner sc = new Scanner(System.in);
 
-    // Create a simulation.  The ShopSimulation 
-    // constructor will read the simulation parameters 
+    // Create a simulation. The ShopSimulation
+    // constructor will read the simulation parameters
     // and initial events using the scanner.
     Simulation simulation = new ShopSimulation(sc);
 

ServiceBeginEvent.java

@@ -1,4 +1,7 @@
-
+/**
+ * @author Yadunand Prem
+ * @version CS2030S AY22/23 Semester 2
+ */
 class ServiceBeginEvent extends BaseShopEvent {
 
     double serviceTime;
@@ -18,9 +21,9 @@ class ServiceBeginEvent extends BaseShopEvent {
 
     @Override
     public Event[] simulate() {
-        this.counter.setAvailable(false);
+        this.counter.occupy();
         double endTime = this.getTime() + this.serviceTime;
         return new Event[] {
                 new ServiceEndEvent(endTime, this.customer, this.shop, this.counter) };
     }
-}
+}

ServiceEndEvent.java

@@ -1,4 +1,7 @@
-
+/**
+ * @author Yadunand Prem
+ * @version CS2030S AY22/23 Semester 2
+ */
 class ServiceEndEvent extends BaseShopEvent {
 
     ShopCounter counter;
@@ -16,7 +19,7 @@ class ServiceEndEvent extends BaseShopEvent {
 
     @Override
     public Event[] simulate() {
-        this.counter.setAvailable(true);
+        this.counter.free();
         return new Event[] { new DepartureEvent(this.getTime(), customer, shop) };
     }
 }

Shop.java

@@ -1,3 +1,7 @@
+/**
+ * @author Yadunand Prem
+ * @version CS2030S AY22/23 Semester 2
+ */
 public class Shop {
     private ShopCounter[] counters;
 

ShopCounter.java

@@ -1,3 +1,7 @@
+/**
+ * @author Yadunand Prem
+ * @version CS2030S AY22/23 Semester 2
+ */
 public class ShopCounter {
     final private int id;
     private boolean available;
@@ -6,8 +10,12 @@ public class ShopCounter {
         return available;
     }
 
-    public void setAvailable(boolean available) {
-        this.available = available;
+    public void occupy() {
+        this.available = false;
+    }
+
+    public void free() {
+        this.available = true;
     }
 
     public ShopCounter(int id) {

ShopSimulation.java

@@ -3,8 +3,8 @@ import java.util.Scanner;
 /**
  * This class implements a shop simulation.
  *
- * @author Wei Tsang
- * @version CS2030S AY21/22 Semester 2
+ * @author Yadunand Prem
+ * @version CS2030S AY22/23 Semester 2
  */
 class ShopSimulation extends Simulation {
 

Simulation.java

@@ -1,19 +1,19 @@
 /**
  * This class is a general abstract class that
- * encapsulates a simulation.  To implement a
+ * encapsulates a simulation. To implement a
  * simulation, inherit from this class and implement
- * the `getInitialEvents` method.  
+ * the `getInitialEvents` method.
  *
- * @author Wei Tsang
- * @version CS2030S AY21/22 Semester 2
+ * @author Yadunand Prem
+ * @version CS2030S AY22/23 Semester 2
  */
 abstract class Simulation {
   /**
    * An abstract method to return an array of events
    * used to initialize the simulation.
    *
-   * @return An array of initial events that the 
-   *         simulator can use to kick-start the 
+   * @return An array of initial events that the
+   *         simulator can use to kick-start the
    *         simulation.
    */
   public abstract Event[] getInitialEvents();

Simulator.java

@@ -3,19 +3,19 @@ import java.util.PriorityQueue;
 /**
  * This class implements a discrete event simulator.
  * The simulator maintains a priority queue of events.
- * It runs through the events and simulates each one until 
+ * It runs through the events and simulates each one until
  * the queue is empty.
  *
- * @author Wei Tsang
- * @version CS2030S AY21/22 Semester 2
+ * @author Yadunand Prem
+ * @version CS2030S AY22/23 Semester 2
  */
 public class Simulator {
   /** The event queue. */
   private final PriorityQueue<Event> events;
 
-  /** 
-   * The constructor for a simulator.  It takes in
-   * a simulation as an argument, and calls the 
+  /**
+   * The constructor for a simulator. It takes in
+   * a simulation as an argument, and calls the
    * getInitialEvents method of that simulation to
    * initialize the event queue.
    *
@@ -30,10 +30,10 @@ public class Simulator {
 
   /**
    * Run the simulation until no more events is in
-   * the queue.  For each event in the queue (in
-   * increasing order of time), print out its string 
-   * representation, then simulate it.  If the 
-   * simulation returns one or more events, add them 
+   * the queue. For each event in the queue (in
+   * increasing order of time), print out its string
+   * representation, then simulate it. If the
+   * simulation returns one or more events, add them
    * to the queue, and repeat.
    */
   public void run() {