design patterns : factory method

design-pattern/gof/src/FactoryMethod/after/BlackShip.java

@@ -0,0 +1,10 @@
+package FactoryMethod.after;
+
+public class BlackShip extends Ship{
+
+    public BlackShip(String name) {
+        setName(name);
+        setColor("black");
+        setLogo("⚓");
+    }
+}

design-pattern/gof/src/FactoryMethod/after/BlackShipFactory.java

@@ -0,0 +1,9 @@
+package FactoryMethod.after;
+
+public class BlackShipFactory extends DefaultShipFactory{
+
+    @Override
+    public Ship createShip(String name) {
+        return new BlackShip(name);
+    }
+}

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

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+package FactoryMethod.after;
+
+public class Client {
+
+    public static void main(String[] args) {
+        Client client = new Client();
+        client.print(new WhiteShipFactory(), "WhiteShip", "email@email.com");
+        client.print(new BlackShipFactory(), "BlackShip", "email@email.com");
+    }
+
+    private void print(ShipFactory shipFactory, String name, String email) {
+        System.out.println(shipFactory.orderShip(name, email));
+    }
+
+}

design-pattern/gof/src/FactoryMethod/after/DefaultShipFactory.java

@@ -0,0 +1,24 @@
+package FactoryMethod.after;
+
+public abstract class DefaultShipFactory implements ShipFactory{
+
+    @Override
+    public void validate(String name, String email) {
+        if (name == null || name.isEmpty()) {
+            throw new IllegalArgumentException("배 이름을 지어주세요.");
+        }
+        if (email == null || email.isEmpty()) {
+            throw new IllegalArgumentException("연락처를 남겨주세요.");
+        }
+    }
+
+    @Override
+    public void prepareFor(String name) {
+        System.out.println(name + " 만들 준비 중");
+    }
+
+    @Override
+    public void sendEmailTo(String email, Ship ship) {
+        System.out.println(ship.getName() + " 다 만들었습니다.");
+    }
+}

design-pattern/gof/src/FactoryMethod/after/Ship.java

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+package FactoryMethod.after;
+
+public class Ship {
+
+    private String name;
+
+    private String color;
+
+    private String logo;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getColor() {
+        return color;
+    }
+
+    public void setColor(String color) {
+        this.color = color;
+    }
+
+    public String getLogo() {
+        return logo;
+    }
+
+    public void setLogo(String logo) {
+        this.logo = logo;
+    }
+
+    @Override
+    public String toString() {
+        return "Ship{" +
+                "name='" + name + '\'' +
+                ", color='" + color + '\'' +
+                ", logo='" + logo + '\'' +
+                '}';
+    }
+}

design-pattern/gof/src/FactoryMethod/after/ShipFactory.java

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+package FactoryMethod.after;
+
+public interface ShipFactory {
+
+    default Ship orderShip(String name, String email) {
+        validate(name, email);
+        prepareFor(name);
+        Ship ship = createShip(name);
+        sendEmailTo(email, ship);
+        return ship;
+    }
+
+    Ship createShip(String name);
+
+    void validate(String name, String email);
+
+    void prepareFor(String name);
+
+    void sendEmailTo(String email, Ship ship);
+}

design-pattern/gof/src/FactoryMethod/after/WhiteShip.java

@@ -0,0 +1,10 @@
+package FactoryMethod.after;
+
+public class WhiteShip extends Ship {
+
+    public WhiteShip(String name) {
+        setName(name);
+        setLogo("\uD83D\uDEE5️");
+        setColor("white");
+    }
+}

design-pattern/gof/src/FactoryMethod/after/WhiteShipFactory.java

@@ -0,0 +1,9 @@
+package FactoryMethod.after;
+
+public class WhiteShipFactory extends DefaultShipFactory {
+
+    @Override
+    public Ship createShip(String name) {
+        return new WhiteShip(name);
+    }
+}