??? ??? ??? ???? ?? ?????? ?? ??? ? ??? ?? ??? ??? ?????. ? ?? ??? ??? ??? ?? ?? ??? ???? ??? ?? ??? ? ????. ? ??? ??? ????? ????? ??????? ???? ?? ?? ?????? ?? ??? ????? ??? ? ?? ?????.

?? ?????? Java? ??? ?? ??? ???? ??? ??? ??? ??? ???????. ?? ??? ??? ?? ??? ??? ?? ???? ????? ????? ? ? ???? ???? ???? ??? ???????.

??? ??? ???? ??????

??? ??? ???? ??? ?????? ?????? ???? ?? ?????? ??? ? ????. ?? ???? ?? ?????? ???? ???? ??? ???? ??? ???? ??? ?? ??? ? ??? ????.

?? ?? ??:

• ?????: ?????? ???? ?? ???
• ??: ?????? ???? ?????
• Adaptee: ?????? ???? ?? ???
• Adapter: Adaptee? ?????? ?? ?????? ???? ??????.

??? ??? ???? ??? ?????? ?? ?????? ???? ????? ?? ???? ???? ???? ?? ?????? ?? ??? ?? ??? ? ????.

---

?? ??: ??? ????

.mp3, .mp4, .vlc ? ??? ??? ??? ?? ??? ???? ?? MediaPlayer ??????? ????? ??? ???. ? ??? ???? ?? ????? ????? ?????? ???? ????. ??? ?? ?? ????? ??? MediaPlayer ??????? ?? ????? ?? ???.

1??: MediaType Enum ??

??? ??? ??? ???? ?? ??? MediaType? ???? ??? ?????. ?? ???????? ??? ??? ??? ? ?? ???? ???? ? ??? ???.

public enum MediaType {
    MP3,
    MP4,
    VLC
}

2??: MediaPlayer ????? ??

MediaPlayer ?????? ??? ?? ??? ??? play() ???? ?????. ??? ?????(? ??????)? ???? ?? ????????.

// The Target Interface
public interface MediaPlayer {
    void play(String fileName);
}

3??: Adaptee ??? ??

???? VlcPlayer? Mp4Player?? ? ?? ??? ???? ???? ?????. ??? ????? MediaPlayer ?????? ???? ?? .vlc ? .mp4 ?? ??? ?? ???? ?? ???? ????.

public enum MediaType {
    MP3,
    MP4,
    VLC
}

4??: ??? ??? ??

?? ??? ???? ?????. ? ???? MediaPlayer ?????? ???? play() ???? ?? ????? ???? ?????.

VlcPlayer? ???:

// The Target Interface
public interface MediaPlayer {
    void play(String fileName);
}

Mp4Player? ???:

// The Adaptee Class - VLC Player
public class VlcPlayer {
    public void playVlc(String fileName) {
        System.out.println("Playing VLC file: " + fileName);
    }
}

// The Adaptee Class - MP4 Player
public class Mp4Player {
    public void playMp4(String fileName) {
        System.out.println("Playing MP4 file: " + fileName);
    }
}

5??: AudioPlayer ??(?????)

AudioPlayer ???? ??? ??? ??? ??? ????? ????????. MediaPlayer ?????? ??? ??? ?????. AudioPlayer ??? ???? ???? ??? ???? ?????? ???? MediaPlayer ?????? ??? ? ????.

?? ?? ???? MediaType? ?? ??? ???? ???? ?????.

// Adapter for VLC Player
public class VlcAdapter implements MediaPlayer {
    private VlcPlayer vlcPlayer;

    public VlcAdapter(VlcPlayer vlcPlayer) {
        this.vlcPlayer = vlcPlayer;
    }

    @Override
    public void play(String fileName) {
        vlcPlayer.playVlc(fileName);
    }
}

6??: ??? ?? ??

?? AudioPlayer? ???? ??? ??? ??? ??? ??? ? ????. MediaType? ?????? AudioPlayer? ??? ??? ??? ?? ??? ???? ???? ?????.

// Adapter for MP4 Player
public class Mp4Adapter implements MediaPlayer {
    private Mp4Player mp4Player;

    public Mp4Adapter(Mp4Player mp4Player) {
        this.mp4Player = mp4Player;
    }

    @Override
    public void play(String fileName) {
        mp4Player.playMp4(fileName);
    }
}

??:

import java.util.HashMap;
import java.util.Map;

public class AudioPlayer {
    private Map<MediaType, MediaPlayer> mediaPlayerMap;

    public AudioPlayer() {
        mediaPlayerMap = new HashMap<>();

        // Register adapters for each media type
        mediaPlayerMap.put(MediaType.VLC, new VlcAdapter(new VlcPlayer()));
        mediaPlayerMap.put(MediaType.MP4, new Mp4Adapter(new Mp4Player()));
    }

    public void play(MediaType mediaType, String fileName) {
        MediaPlayer mediaPlayer = mediaPlayerMap.get(mediaType);

        if (mediaPlayer != null) {
            mediaPlayer.play(fileName);  // Delegate play to the appropriate adapter
        } else {
            System.out.println("Invalid media type: " + mediaType + ". Format not supported.");
        }
    }
}

---

??? ?? ??? ??

1. ?? ?? ??: ??? ??? ?????(AudioPlayer)? ??? ??? ????? ?? ?? ?? ??? ?????. ???? ??? ???? ?????? ?? ?????? ??? ? ??? ???.

2. ???: ??? ???? ???? ????? ??? ???? ??? AudioPlayer? ???? ??? ??? ??? ?? ??? ? ????.

3. ?? ????: VlcPlayer ? Mp4Player ???? ???? ???? ?? ??? ???? ??? ?? ??? ?? ?? ???? ??? ? ????.

4. ???: ??? ??(?: .avi, .flv)? ???? ???? ??? ??? ???? ? ???? ???? ???? ??? ? ????.

---

??? ??? ?? ???? ??

??? ??? ?? ?? ??? ??? ?? ???? ???? ? ?? ???? ?? ???? ?????. ?? ??? ???? ??? ??? ????.

1. ??? ? ?? ??

?? ??? ???? ???? ??? ???? ?? ?? ???? ?? ? ????. ??? ??? ???? ?? ?????? ?? ????? ?? ? ???? ??, ?? ??? ??? ? ??? ??(?? ??)? ???? ????. ?? ?????? ???? ?? ?? ?? ??? ???? ????? ??? ??? ??? ? ????.

?? ?? ??? ??? ???? ??? ?? ??(?: ?? ?? ??) ??? ??? ???? ??? ??? ???? ??? ??? ??? ?? ? ????.

2. ???? ????? ??

Decorator ? Adapter ??? ?? ??? ??? ???? ? ?????. ?? ???? ??? ????.

• ???: ??? ?????? ???? ?? ??? ????? ???.
• ?????: ?????? ???? ?? ??? ??? ??? ?????.

??? ??? ???? ?? ???? ???? ????? ?? ?? ????? ??? ???? ?? ???? ?? ??(?: ?? ?? ??? ??)? ??? ? ????.

3. ??? ? ??? ??

Facade ??? ??? ?? ???? ???? ?????? ?????. ?? ???? ?? ?? ??? ???? ?? ?????? ?? ?? Facade ??? ??? ??? ???? ?? ???? ?? ??? Facade? ?? ?????? ????? ??? ? ????.

?? ?? ??? ??? ?? ?? ???? Facade? ???? ???? ? ??? ?? ??? ????? ???? ?? ?????? ?? ?? Adapter ??? ???? ?? ??.

4. ??? ? ??? ??

??? ??? ?? ??? ?? ??? ?? ?? ???? ?????. ??? ??? ??? ?????? ???? ??, ??? ??? ??? ?? ???? ???? ????? ??? ??, ?? ?? ??? ??? ?? ??? ?????.

??? ??? ?????? ???? ?? ?? ???? ????? ?????? ? ??? ?? ??? ? ????. ?? ?? ???? ???? ??? ??? ?? ???? ???? ??? ?????? ?????? ???? ???? ??? ? ????.

---

??

??? ??? ??? ???? ?? ?????? ???? ? ??? ???, ??? ??? ?? ?????? ??? ? ???? ?????. ??? ??? ???? ??? ?? ??? ???? ?? ??? ???? ??? ?? ???? ?? ??? ? ??? ? ? ????.

??? ??? Strategy, Decorator, Facade, Proxy? ?? ?? ???? ? ???? ???? ????. ??????? ???. ?? ?? ??? ???? ?? ?? ???? ???? ?? ?????? ?? ???? ??? ??? ?? ??? ????? ???? ??? ? ????.

?? ??:

• ??? ??: ??? ??? ?? ?? ?????? ?? Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides
• ?? ??? ??? ?? Eric Freeman, Elisabeth Robson
• Refactoring Guru - ??? ??

? ??? ??? ??? ?? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!