design patterns : memento

design-pattern/gof/src/memento/after/Client.java

@@ -0,0 +1,18 @@
+package memento.after;
+
+public class Client {
+
+    public static void main(String[] args) {
+        Game game = new Game();
+        game.setBlueTeamScore(10);
+        game.setRedTeamScore(20);
+
+        GameSave save = game.save();
+        game.setBlueTeamScore(12);
+        game.setRedTeamScore(22);
+        game.restore(save);
+
+        System.out.println(game.getBlueTeamScore());
+        System.out.println(game.getRedTeamScore());
+    }
+}

design-pattern/gof/src/memento/after/Game.java

@@ -0,0 +1,35 @@
+package memento.after;
+
+import java.io.Serializable;
+
+public class Game implements Serializable {
+
+    private int redTeamScore;
+
+    private int blueTeamScore;
+
+    public int getRedTeamScore() {
+        return redTeamScore;
+    }
+
+    public void setRedTeamScore(int redTeamScore) {
+        this.redTeamScore = redTeamScore;
+    }
+
+    public int getBlueTeamScore() {
+        return blueTeamScore;
+    }
+
+    public void setBlueTeamScore(int blueTeamScore) {
+        this.blueTeamScore = blueTeamScore;
+    }
+
+    public GameSave save() {
+        return new GameSave(this.blueTeamScore, this.redTeamScore);
+    }
+
+    public void restore(GameSave gameSave) {
+        this.blueTeamScore = gameSave.getBlueTeamScore();
+        this.redTeamScore = gameSave.getRedTeamScore();
+    }
+}

design-pattern/gof/src/memento/after/GameSave.java

@@ -0,0 +1,21 @@
+package memento.after;
+
+public class GameSave {
+
+    private final int blueTeamScore;
+
+    private final int redTeamScore;
+
+    public GameSave(int blueTeamScore, int redTeamScore) {
+        this.blueTeamScore = blueTeamScore;
+        this.redTeamScore = redTeamScore;
+    }
+
+    public int getBlueTeamScore() {
+        return blueTeamScore;
+    }
+
+    public int getRedTeamScore() {
+        return redTeamScore;
+    }
+}

design-pattern/gof/src/memento/before/Client.java

@@ -0,0 +1,17 @@
+package memento.before;
+
+public class Client {
+
+    public static void main(String[] args) {
+        Game game = new Game();
+        game.setRedTeamScore(10);
+        game.setBlueTeamScore(20);
+
+        int blueTeamScore = game.getBlueTeamScore();
+        int redTeamScore = game.getRedTeamScore();
+
+        Game restoredGame = new Game();
+        restoredGame.setBlueTeamScore(blueTeamScore);
+        restoredGame.setRedTeamScore(redTeamScore);
+    }
+}

design-pattern/gof/src/memento/before/Game.java

@@ -0,0 +1,26 @@
+package memento.before;
+
+import java.io.Serializable;
+
+public class Game implements Serializable {
+
+    private int redTeamScore;
+
+    private int blueTeamScore;
+
+    public int getRedTeamScore() {
+        return redTeamScore;
+    }
+
+    public void setRedTeamScore(int redTeamScore) {
+        this.redTeamScore = redTeamScore;
+    }
+
+    public int getBlueTeamScore() {
+        return blueTeamScore;
+    }
+
+    public void setBlueTeamScore(int blueTeamScore) {
+        this.blueTeamScore = blueTeamScore;
+    }
+}