Memento Design Pattern - Video Game Project

premaseem · premaseem · commit c8d0bdefec16 · 2018-03-13T13:29:55.000-05:00
State of the game / player can be restored
diff --git a/pattern/src/com/premaseem/Client.java b/pattern/src/com/premaseem/Client.java
diff --git a/pattern/src/com/premaseem/memento/videoGame/CareTaker.java b/pattern/src/com/premaseem/memento/videoGame/CareTaker.java
@@ -0,0 +1,34 @@
+package com.premaseem.memento.videoGame;
+/*
+@author: Aseem Jain
+@title: Design Patterns with Java 9
+@link: https://premaseem.wordpress.com/category/computers/design-patterns/
+*/
+
+import java.util.HashMap;
+import java.util.Map;
+
+/*
+ * Store Room
+ */
+public class CareTaker {
+	Map<String, Memento> restorePoints = new HashMap<String, Memento>();
+	Originator Originator = new Originator();
+	
+	public void saveGame(String restorePointName, GamePlayer player){
+		Memento memento = Originator.saveMemento(player);
+		restorePoints.put(restorePointName, memento);
+	}
+	
+	public void restoreGame(String restorePointName, GamePlayer player){
+		GamePlayer playerSnapShot = null;
+		Memento memento = restorePoints.get(restorePointName);
+		if(memento==null){
+			System.out.printf(" %s Restore point name is no correct \n",restorePointName);
+		}else{
+			 playerSnapShot = memento.getPlayerSnapShot();
+			 Originator.restorePlayerSnapshot(player, playerSnapShot);
+			 System.out.printf(" %s Restore point is applied successfully \n ",restorePointName);
+		}
+	}
+}
diff --git a/pattern/src/com/premaseem/memento/videoGame/ClientFile.java b/pattern/src/com/premaseem/memento/videoGame/ClientFile.java
@@ -0,0 +1,61 @@
+package com.premaseem.memento.videoGame;
+
+/*
+@author: Aseem Jain
+@title: Design Patterns with Java 9
+@link: https://premaseem.wordpress.com/category/computers/design-patterns/
+*/
+
+import java.util.Scanner;
+
+public class ClientFile {
+
+	public static void main(String[] args) {
+
+		System.out.println("Welcome to Memento Pattern Video Game ");
+		Scanner scan = new Scanner(System.in);
+
+		CareTaker careTaker = new CareTaker();
+		GamePlayer player = new GamePlayer();
+
+		System.out.println("Please enter your player name ...  ");
+		player.setPlayerName(scan.next());
+
+		String repeatRunFlag = "yes";
+		while (!repeatRunFlag.equalsIgnoreCase("no")) {
+
+			System.out.println("Please enter your players Mask name eg. Mario, Batman, SuperMan  ");
+			player.setMaskPicked(scan.next());
+
+			System.out.println("Game started - points gained and level changed ");
+			System.out.println("current state of player " + player);
+
+			player.increase100Points();
+			System.out.println("Current state of player " + player);
+
+			System.out.println("Do you want to save the state of your game? Enter restore point name ");
+			careTaker.saveGame(scan.next(), player);
+
+			player.increase100Points();
+			System.out.println("Game Over :-( ");
+			System.out.println(player);
+			
+			System.out.println("Do you want to restore your game?  Enter restore point  ");
+			careTaker.restoreGame(scan.next(), player);
+
+			System.out.println("Restored state of player to previous state " + player);
+
+			System.out.println("=============================");
+
+			System.out.println("Press No to Exit and any other character to repeat  .... ");
+			try {
+				repeatRunFlag = scan.next();
+			} catch (Exception e) {
+				repeatRunFlag = "no";
+			}
+		}
+
+		System.out.println("\n $$$$$$$$$$$$$$$$$$$$  Thanks by Prem Aseem $$$$$$$$$$$$$$$$$$$$$$ \n ");
+		System.out.println("\n $$$$$$$$$$$$$$$$$$$$$  www.premaseem.me  $$$$$$$$$$$$$$$$$$$$$$ \n ");
+	}
+}
diff --git a/pattern/src/com/premaseem/memento/videoGame/GamePlayer.java b/pattern/src/com/premaseem/memento/videoGame/GamePlayer.java
@@ -0,0 +1,67 @@
+package com.premaseem.memento.videoGame;
+/*
+@author: Aseem Jain
+@title: Design Patterns with Java 9
+@link: https://premaseem.wordpress.com/category/computers/design-patterns/
+*/
+
+public class GamePlayer implements Cloneable  {
+
+	String playerName;
+	String maskPicked="premAseem";
+	Integer level=1;
+	Integer totalPoints=100;
+
+	String getPlayerName() {
+		return playerName;
+	}
+
+	void setPlayerName(String playerName) {
+		this.playerName = playerName;
+	}
+
+	String getMaskPicked() {
+		return maskPicked;
+	}
+
+	void setMaskPicked(String maskPicked) {
+		this.maskPicked = maskPicked;
+	}
+
+	Integer getLevel() {
+		return level;
+	}
+
+	void setLevel(Integer level) {
+		this.level = level;
+	}
+
+	Integer getTotalPoints() {
+		return totalPoints;
+	}
+
+	void setTotalPoints(Integer totalPoints) {
+		this.totalPoints = totalPoints;
+	}
+	
+	void increase100Points(){
+		totalPoints+=100;
+		level+=1;
+	}
+
+	
+	
+	@Override
+    protected Object clone() throws CloneNotSupportedException {
+	    return super.clone();
+    }
+
+	@Override
+    public String toString() {
+	    System.out.printf(" name: %s - Mask: %s - Level: %d - Points : %d ",playerName,maskPicked,level,totalPoints); 
+		return super.toString();
+    }
+	
+	
+
+}
diff --git a/pattern/src/com/premaseem/memento/videoGame/Memento.java b/pattern/src/com/premaseem/memento/videoGame/Memento.java
@@ -0,0 +1,21 @@
+package com.premaseem.memento.videoGame;
+
+/*
+@author: Aseem Jain
+@title: Design Patterns with Java 9
+@link: https://premaseem.wordpress.com/category/computers/design-patterns/
+*/
+
+public class Memento {
+	private GamePlayer player;
+
+	public Memento(GamePlayer player) {
+		super();
+		this.player = player;
+	}
+	
+	GamePlayer getPlayerSnapShot(){
+		return player;
+	}
+
+}
diff --git a/pattern/src/com/premaseem/memento/videoGame/Originator.java b/pattern/src/com/premaseem/memento/videoGame/Originator.java
@@ -0,0 +1,36 @@
+package com.premaseem.memento.videoGame;
+
+/*
+@author: Aseem Jain
+@title: Design Patterns with Java 9
+@link: https://premaseem.wordpress.com/category/computers/design-patterns/
+*/
+
+public class Originator {
+	GamePlayer player;
+
+	Memento saveMemento(GamePlayer player){
+		GamePlayer playerSnapShot = createPlayerSnapshot(player);
+		Memento memento = new Memento(playerSnapShot);
+		return memento;
+	}
+
+	private GamePlayer createPlayerSnapshot(GamePlayer player) {
+		GamePlayer playerSnapShot=null;
+		try {
+			playerSnapShot = (GamePlayer) player.clone();
+        } catch (CloneNotSupportedException e) {
+
+	        e.printStackTrace();
+        }
+		
+		return playerSnapShot;
+    }
+	
+	 void restorePlayerSnapshot(GamePlayer playerSnapShot,GamePlayer player) {
+	    playerSnapShot.setMaskPicked(player.getMaskPicked());
+	    playerSnapShot.setLevel(player.getLevel());
+	    playerSnapShot.setTotalPoints(player.getTotalPoints());
+	    playerSnapShot.setPlayerName(player.getPlayerName());
+    }
+}
diff --git a/patternBonus/src/com/premaseem/Client.java b/patternBonus/src/com/premaseem/Client.java
