Refatoring

- separated net topology from the simulation nodes
- moved files in a better hierarchy

src/main/java/net/berack/upo/valpre/sim/Event.java

@@ -0,0 +1,75 @@
+package net.berack.upo.valpre.sim;
+
+/**
+ * Represents an event in the simulation.
+ */
+public class Event implements Comparable<Event> {
+    public final double time;
+    public final Type type;
+    public final ServerNode node;
+
+    /**
+     * Create a new event.
+     * 
+     * @param type The type of event.
+     * @param node The node that the event is associated with.
+     * @param time The time at which the event occurs.
+     */
+    private Event(Type type, ServerNode node, double time) {
+        this.type = type;
+        this.time = time;
+        this.node = node;
+    }
+
+    @Override
+    public int compareTo(Event other) {
+        if (this.time < other.time)
+            return -1;
+        if (this.time == other.time)
+            return 0;
+        return 1;
+    }
+
+    /**
+     * Create a new event.
+     * 
+     * @param node The node that the event is associated with.
+     * @param time The time at which the event occurs.
+     * @param type The type of event.
+     * 
+     * @return The new event.
+     */
+    public static Event newType(ServerNode node, double time, Type type) {
+        return new Event(type, node, time);
+    }
+
+    /**
+     * Create a new arrival event.
+     * 
+     * @param node The node that the event is associated with.
+     * @param time The time at which the event occurs.
+     * @return The new event.
+     */
+    public static Event newArrival(ServerNode node, double time) {
+        return new Event(Type.ARRIVAL, node, time);
+    }
+
+    /**
+     * Create a new departure event.
+     * 
+     * @param node The node that the event is associated with.
+     * @param time The time at which the event occurs.
+     * @return The new event.
+     */
+    public static Event newDeparture(ServerNode node, double time) {
+        return new Event(Type.DEPARTURE, node, time);
+    }
+
+    /**
+     * The type of event.
+     */
+    public static enum Type {
+        ARRIVAL,
+        DEPARTURE,
+    }
+}