added some more json and model utils in order wo load data to and from the gamefield

src/main/java/src/Model.java

@@ -14,6 +14,20 @@ public class Model {
     public int difficulty;
     private GameField gameField;
 
+    public Model(JSONObject mock, GameField gameField) {
+
+        this.gameField = gameField;
+
+        model = new int[SIZE][];
+
+        for (int i = 0; i < SIZE; i++) {
+            model[i] = new int[SIZE];
+        }
+
+        jsonToModel(mock);
+        modelToGameField();
+    }
+
     public int getDifficulty() {
         return difficulty;
     }
@@ -141,4 +155,29 @@ public class Model {
 
         return game;
     }
+
+    public void jsonToModel(JSONObject jsonObject) {
+
+        JSONArray values = (JSONArray) jsonObject.get("values");
+
+        Iterator iterator = values.iterator();
+
+        while (iterator.hasNext()) {
+
+            JSONObject next = (JSONObject) iterator.next();
+            int x = (int) next.get("x");
+            int y = (int) next.get("y");
+            int value = (int) next.get("value");
+
+            setField(x, y, value);
+        }
+    }
+
+    public void modelToGameField() {
+        for (int i = 0; i < 9; i++) {
+            for (int j = 0; j < 9; j++) {
+                gameField.setValue(i, j, getField(i, j));
+            }
+        }
+    }
 }

src/test/java/ModelTest.java

@@ -232,4 +232,30 @@ public class ModelTest extends MainFrame {
             assertEquals(r, value, "x:"+x+", y:"+y+"="+value+"-->"+r+"?");
         }
     }
+
+    @Test
+    public void test_jsonToModelToGameField() {
+
+        //mock
+        GameField gf = new GameField(360);
+        for (int i = 0, k = 13; i < 9; i++) {
+            for (int j = 0, l = 17; j < 9; j++) {
+                gf.setValue(i, j, (i*l+j*k)%9);
+            }
+        }
+        Model m = new Model(gf);
+        JSONObject mock = m.modelToJson();
+
+        //test
+        GameField gameField = new GameField(360);
+        Model model = new Model(mock, gameField);
+
+        for (int i = 0, k = 13; i < 9; i++) {
+            for (int j = 0, l = 17; j < 9; j++) {
+                int value = gameField.getValue(i, j);
+                int expected = (i * k + j * l) % 9;
+                assertEquals(expected, value, "i:"+i+", j:"+j+"="+value+"-->"+expected+"?");
+            }
+        }
+    }
 }