[PATTERN] Strategy Pattern 구현

src/statepattern/Client.java → src/behavior/statepattern/Client.java

@@ -1,4 +1,4 @@
-package statepattern;
+package behavior.statepattern;
 
 public class Client {
     public static void main(String[] args) {

src/statepattern/LaptopContext.java → src/behavior/statepattern/LaptopContext.java

@@ -1,8 +1,8 @@
-package statepattern;
+package behavior.statepattern;
 
-import statepattern.state.OffState;
-import statepattern.state.PowerState;
-import statepattern.state.SavingState;
+import behavior.statepattern.state.OffState;
+import behavior.statepattern.state.PowerState;
+import behavior.statepattern.state.SavingState;
 
 public class LaptopContext {
     private PowerState powerState;

src/statepattern/state/OffState.java → src/behavior/statepattern/state/OffState.java

@@ -1,6 +1,6 @@
-package statepattern.state;
+package behavior.statepattern.state;
 
-import statepattern.LaptopContext;
+import behavior.statepattern.LaptopContext;
 
 public class OffState implements PowerState{
 

src/statepattern/state/OnState.java → src/behavior/statepattern/state/OnState.java

@@ -1,6 +1,6 @@
-package statepattern.state;
+package behavior.statepattern.state;
 
-import statepattern.LaptopContext;
+import behavior.statepattern.LaptopContext;
 
 public class OnState implements PowerState{
 

src/behavior/statepattern/state/PowerState.java

@@ -0,0 +1,7 @@
+package behavior.statepattern.state;
+
+import behavior.statepattern.LaptopContext;
+
+public interface PowerState {
+    void pushPowerButton(LaptopContext context);
+}

src/statepattern/state/SavingState.java → src/behavior/statepattern/state/SavingState.java

@@ -1,6 +1,6 @@
-package statepattern.state;
+package behavior.statepattern.state;
 
-import statepattern.LaptopContext;
+import behavior.statepattern.LaptopContext;
 
 public class SavingState implements PowerState{
 

src/behavior/strategypattern/Client.java

@@ -0,0 +1,20 @@
+package behavior.strategypattern;
+
+import behavior.strategypattern.context.Item;
+import behavior.strategypattern.context.ShoppingCart;
+import behavior.strategypattern.strategy.MasterCardStrategy;
+import behavior.strategypattern.strategy.MobilePayStrategy;
+
+public class Client {
+    public static void main(String[] args) {
+        ShoppingCart cart = new ShoppingCart();
+        cart.addItem(new Item("Macbook Pro", 10000));
+        cart.addItem(new Item("IPhone", 2000));
+
+        cart.setPaymentStrategy(new MasterCardStrategy("Dmori", "1234-1234-1234-1234", "123"));
+        cart.pay();
+
+        cart.setPaymentStrategy(new MobilePayStrategy("example@naver.com", "12345"));
+        cart.pay();
+    }
+}

src/behavior/strategypattern/context/Item.java

@@ -0,0 +1,16 @@
+package behavior.strategypattern.context;
+
+public class Item {
+
+    private String name;
+    private int price;
+
+    public Item(String name, int price) {
+        this.name = name;
+        this.price = price;
+    }
+
+    public int getPrice() {
+        return price;
+    }
+}

src/behavior/strategypattern/context/ShoppingCart.java

@@ -0,0 +1,32 @@
+package behavior.strategypattern.context;
+
+import behavior.strategypattern.strategy.PaymentStrategy;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ShoppingCart {
+
+    private List<Item> items;
+    private PaymentStrategy paymentStrategy;
+
+    public ShoppingCart() {
+        this.items = new ArrayList<>();
+    }
+
+    public void addItem(Item item) {
+        this.items.add(item);
+    }
+
+    public void setPaymentStrategy(PaymentStrategy paymentStrategy) {
+        this.paymentStrategy = paymentStrategy;
+    }
+
+    public void pay(){
+        int amount = 0;
+        for (Item item : items) {
+            amount += item.getPrice();
+        }
+        this.paymentStrategy.pay(amount);
+    }
+}

src/behavior/strategypattern/strategy/MasterCardStrategy.java

@@ -0,0 +1,19 @@
+package behavior.strategypattern.strategy;
+
+public class MasterCardStrategy implements PaymentStrategy {
+
+    private String name;
+    private String cardNumber;
+    private String cvv;
+
+    public MasterCardStrategy(String name, String cardNumber, String cvv) {
+        this.name = name;
+        this.cardNumber = cardNumber;
+        this.cvv = cvv;
+    }
+
+    @Override
+    public void pay(int amount) {
+        System.out.println(amount + " Won paid using Master Card");
+    }
+}

src/behavior/strategypattern/strategy/MobilePayStrategy.java

@@ -0,0 +1,17 @@
+package behavior.strategypattern.strategy;
+
+public class MobilePayStrategy implements PaymentStrategy {
+
+    private String email;
+    private String password;
+
+    public MobilePayStrategy(String email, String password) {
+        this.email = email;
+        this.password = password;
+    }
+
+    @Override
+    public void pay(int amount) {
+        System.out.println(amount + " Won paid using Mobile Pay");
+    }
+}

src/behavior/strategypattern/strategy/PaymentStrategy.java

@@ -0,0 +1,5 @@
+package behavior.strategypattern.strategy;
+
+public interface PaymentStrategy {
+    void pay(int amount);
+}