Fixed random token assigning and realisation

Token class now has two functions: assignRandomType and realiseRandomType
The former can be used to assign any random type to the token including the random type
The latter can be used to assign a concrete random type to the token (not the random type)

#story[1245]

src/main/java/seng302/model/token/Token.java

@@ -1,5 +1,9 @@
 package seng302.model.token;
 
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Random;
 import seng302.model.GeoPoint;
 
 /**
@@ -9,6 +13,7 @@ import seng302.model.GeoPoint;
 public class Token extends GeoPoint {
 
     private TokenType tokenType;
+    private Random random = new Random();
 
     public Token(TokenType tokenType, double lat, double lng) {
         super(lat, lng);
@@ -19,7 +24,21 @@ public class Token extends GeoPoint {
         return tokenType;
     }
 
-    public void setTokenType(TokenType tokenType) {
-        this.tokenType = tokenType;
+    /**
+     * Assigns a random type to the token (including the random type token)
+     */
+    public void assignRandomType() {
+        tokenType = TokenType.values()[random.nextInt(TokenType.values().length)];
     }
+
+    /**
+     * Assigns a random, concrete type to the token (cannot be the random type)
+     */
+    public void realiseRandom() {
+        List<TokenType> tokenTypeList = new ArrayList<>(Arrays.asList(TokenType.values()));
+        tokenTypeList.remove(TokenType.RANDOM);
+        tokenType = tokenTypeList.get(random.nextInt(tokenTypeList.size()));
+    }
+
+
 }