added UUID on ball draws

balldraw_core/src/main/java/com/nunoaac/balldraw_core/balldraw/domain/BallDraw.java

@@ -5,9 +5,10 @@
 import java.util.Calendar;
 import java.util.Date;
 import java.util.List;
+import java.util.UUID;
 
 /**
- * Represents a balldraw, with generation timestamp, Pool size, Draw itself and
+ * Represents a balldraw, with generation timestamp, UUID, Pool size, Draw itself and
  * algorithm used to generate the draw.
  *
  * @author Nuno Costa ([email protected])
@@ -18,12 +19,14 @@ public class BallDraw {
     private final Integer pool;
     private final List<Integer> draw;
     private final DrawAlgorithm algorithm;
+    private final UUID uid;
 
     public BallDraw(Integer pool, List<Integer> draw, DrawAlgorithm algorithm) {
         this.creationDate = Calendar.getInstance().getTime();
         this.pool = pool;
         this.draw = draw;
         this.algorithm = algorithm;
+        uid = UUID.randomUUID();
     }
 
     public Date getCreationDate() {
@@ -50,6 +53,10 @@ public DrawAlgorithm getAlgorithm() {
     public int getSize() {
         return this.draw.size();
     }
+
+    public UUID getUid() {
+        return this.uid;
+    }
 
     @Override
     public String toString() {
@@ -59,6 +66,7 @@ public String toString() {
         return "BallDraw ["
                 + (creationDate != null ? "creationDate=" + sdf.format(creationDate.getTime()) + ", "
                         : "") + (pool != null ? "pool=" + pool + ", " : "")
+                + (uid != null ? "uid=" + uid.toString() : "") + "]"
                 + (draw != null ? "size=" + draw.size() : "") + "]"
                 + (draw != null ? "draw=" + draw : "") + "]"
                 + (algorithm != null ? "algorithm=" + algorithm : "") + "]";