어댑터 & 퍼사드 패턴

src/adapter_facade/AdapterPattern.java

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+package adapter_facade;
+
+import adapter_facade.adapter.Duck;
+import adapter_facade.adapter.Turkey;
+import adapter_facade.adapter.TurkeyAdapter;
+import adapter_facade.adapter.impl.MallardDuck;
+import adapter_facade.adapter.impl.WildTurkey;
+
+
+/**
+ * Duck: 타겟 인터페이스
+ * Turkey: adaptee 인터페이스
+ */
+public class AdapterPattern {
+    public static void main(String[] args) {
+        Duck mallardDuck = new MallardDuck();
+        testDuck(mallardDuck);
+
+        Turkey turkey = new WildTurkey();
+        Duck turkeyAdapter = new TurkeyAdapter(turkey);
+        testDuck(turkeyAdapter);
+    }
+
+    /**
+     * 클라이언트는 중간에 어댑터가 있는 사실을 모름
+     */
+    private static void testDuck(Duck duck) {
+        duck.quack();
+        duck.fly();
+    }
+}

src/adapter_facade/FacadePattern.java

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+package adapter_facade;
+
+import adapter_facade.facade.HomeTheaterFacade;
+import adapter_facade.facade.clazz.*;
+
+public class FacadePattern {
+    public static void main(String[] args) {
+        Amplifier amp = new Amplifier("Amplifier");
+        Tuner tuner = new Tuner("AM/FM Tuner", amp);
+        StreamingPlayer player = new StreamingPlayer("Streaming Player", amp);
+        Projector projector = new Projector("Projector", player);
+        TheaterLights lights = new TheaterLights("Theater Ceiling Lights");
+        Screen screen = new Screen("Theater Screen");
+        PopcornPopper popper = new PopcornPopper("Popcorn Popper");
+
+        HomeTheaterFacade homeTheater =
+                new HomeTheaterFacade(amp, tuner, player,
+                        projector, screen, lights, popper);
+
+        homeTheater.watchMovie("Raiders of the Lost Ark");
+        homeTheater.endMovie();
+    }
+}

src/adapter_facade/adapter/Duck.java

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+package adapter_facade.adapter;
+
+public interface Duck {
+    void quack();
+
+    void fly();
+}

src/adapter_facade/adapter/Turkey.java

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+package adapter_facade.adapter;
+
+public interface Turkey {
+    void gobble();
+
+    void fly();
+}

src/adapter_facade/adapter/TurkeyAdapter.java

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+package adapter_facade.adapter;
+
+/**
+ * Duck 객체 대신 Turkey 객체를 사용하기 위해 적용할 어댑터
+ * <p>
+ * - Turkey : adaptee 인스턴스
+ * - Duck : 타겟 인터페이스
+ */
+public class TurkeyAdapter implements Duck {
+
+    private final Turkey turkey; // adaptee 인스턴스
+
+    public TurkeyAdapter(Turkey turkey) {
+        this.turkey = turkey;
+    }
+
+
+    /**
+     * quack, fly : target request
+     */
+    @Override
+    public void quack() {
+        // translated request
+        turkey.gobble();
+    }
+
+    @Override
+    public void fly() {
+        // translated request
+        for (int i = 0; i < 5; i++) {
+            turkey.fly();
+        }
+    }
+}

src/adapter_facade/adapter/impl/MallardDuck.java

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+package adapter_facade.adapter.impl;
+
+import adapter_facade.adapter.Duck;
+
+public class MallardDuck implements Duck {
+    @Override
+    public void quack() {
+        System.out.println("꽥");
+    }
+
+    @Override
+    public void fly() {
+        System.out.println("날고 있음");
+    }
+}

src/adapter_facade/adapter/impl/WildTurkey.java

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+package adapter_facade.adapter.impl;
+
+import adapter_facade.adapter.Turkey;
+
+public class WildTurkey implements Turkey {
+    @Override
+    public void gobble() {
+        System.out.println("골골");
+    }
+
+    @Override
+    public void fly() {
+        System.out.println("짧게 날고 있음");
+    }
+}

src/adapter_facade/facade/HomeTheaterFacade.java

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+package adapter_facade.facade;
+
+import adapter_facade.facade.clazz.*;
+
+/**
+ * 퍼사드 패턴은 여러 서브시스템의 구성요소들을 합쳐서 통합 인터페이스(watchMovie, endMovie)를 만든다
+ */
+public class HomeTheaterFacade {
+
+    // 서브 시스템의 구성 요소들
+    Amplifier amp;
+    Tuner tuner;
+    StreamingPlayer player;
+    Projector projector;
+    TheaterLights lights;
+    Screen screen;
+    PopcornPopper popper;
+
+    public HomeTheaterFacade(Amplifier amp,
+                             Tuner tuner,
+                             StreamingPlayer player,
+                             Projector projector,
+                             Screen screen,
+                             TheaterLights lights,
+                             PopcornPopper popper) {
+
+        this.amp = amp;
+        this.tuner = tuner;
+        this.player = player;
+        this.projector = projector;
+        this.screen = screen;
+        this.lights = lights;
+        this.popper = popper;
+    }
+
+    public void watchMovie(String movie) {
+        System.out.println("Get ready to watch a movie...");
+        popper.on();
+        popper.pop();
+        lights.dim(10);
+        screen.down();
+        projector.on();
+        projector.wideScreenMode();
+        amp.on();
+        amp.setStreamingPlayer(player);
+        amp.setSurroundSound();
+        amp.setVolume(5);
+        player.on();
+        player.play(movie);
+    }
+
+
+    public void endMovie() {
+        System.out.println("Shutting movie theater down...");
+        popper.off();
+        lights.on();
+        screen.up();
+        projector.off();
+        amp.off();
+        player.stop();
+        player.off();
+    }
+
+    public void listenToRadio(double frequency) {
+        System.out.println("Tuning in the airwaves...");
+        tuner.on();
+        tuner.setFrequency(frequency);
+        amp.on();
+        amp.setVolume(5);
+        amp.setTuner(tuner);
+    }
+
+    public void endRadio() {
+        System.out.println("Shutting down the tuner...");
+        tuner.off();
+        amp.off();
+    }
+}

src/adapter_facade/facade/clazz/Amplifier.java

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+package adapter_facade.facade.clazz;
+
+public class Amplifier {
+    String description;
+    Tuner tuner;
+    StreamingPlayer player;
+
+    public Amplifier(String description) {
+        this.description = description;
+    }
+
+    public void on() {
+        System.out.println(description + " on");
+    }
+
+    public void off() {
+        System.out.println(description + " off");
+    }
+
+    public void setStereoSound() {
+        System.out.println(description + " stereo mode on");
+    }
+
+    public void setSurroundSound() {
+        System.out.println(description + " surround sound on (5 speakers, 1 subwoofer)");
+    }
+
+    public void setVolume(int level) {
+        System.out.println(description + " setting volume to " + level);
+    }
+
+    public void setTuner(Tuner tuner) {
+        System.out.println(description + " setting tuner to " + tuner);
+        this.tuner = tuner;
+    }
+
+    public void setStreamingPlayer(StreamingPlayer player) {
+        System.out.println(description + " setting Streaming player to " + player);
+        this.player = player;
+    }
+
+    public String toString() {
+        return description;
+    }
+}

src/adapter_facade/facade/clazz/PopcornPopper.java

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+package adapter_facade.facade.clazz;
+
+public class PopcornPopper {
+    String description;
+
+    public PopcornPopper(String description) {
+        this.description = description;
+    }
+
+    public void on() {
+        System.out.println(description + " on");
+    }
+
+    public void off() {
+        System.out.println(description + " off");
+    }
+
+    public void pop() {
+        System.out.println(description + " popping popcorn!");
+    }
+
+
+    public String toString() {
+        return description;
+    }
+}

src/adapter_facade/facade/clazz/Projector.java

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+package adapter_facade.facade.clazz;
+
+public class Projector {
+    String description;
+    StreamingPlayer player;
+
+    public Projector(String description, StreamingPlayer player) {
+        this.description = description;
+        this.player = player;
+    }
+
+    public void on() {
+        System.out.println(description + " on");
+    }
+
+    public void off() {
+        System.out.println(description + " off");
+    }
+
+    public void wideScreenMode() {
+        System.out.println(description + " in widescreen mode (16x9 aspect ratio)");
+    }
+
+    public void tvMode() {
+        System.out.println(description + " in tv mode (4x3 aspect ratio)");
+    }
+
+    public String toString() {
+        return description;
+    }
+}

src/adapter_facade/facade/clazz/Screen.java

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+package adapter_facade.facade.clazz;
+
+public class Screen {
+    String description;
+
+    public Screen(String description) {
+        this.description = description;
+    }
+
+    public void up() {
+        System.out.println(description + " going up");
+    }
+
+    public void down() {
+        System.out.println(description + " going down");
+    }
+
+
+    public String toString() {
+        return description;
+    }
+}