PHP适配器模式

//适配器模式

class Mp4

{

  public function play($fileName)

  {

      echo 'play '.$fileName.'';

  }

}

class Mp3

{

  public function play($fileName)

  {

      echo 'play '.$fileName.'';

  }

}

class MediaAdapter

{

  public function play($audioType, $fileName)

  {

      $funcName='get_'.strtolower($audioType);

      if (method_exists($this, $funcName))

      {

          $player = call_user_func(array($this,$funcName));

          $player->play($fileName);

      }else{

          echo 'Invalid media.'.$audioType." format not supported";

      }

  }

  private function get_mp4()

  {

      return new Mp4();

  }

  private function get_mp3()

  {

      return new Mp3();

  }

}

class Vlc

{

  public function play($fileName)

  {

      echo 'play '.$fileName.'';

  }

}

class AudioPlayer extends MediaAdapter

{

  protected function get_vlc()

  {

      return new Vlc();

  }

}

$audioPlayer = new AudioPlayer();

$audioPlayer->play('Mp3','horizon.mp3');

$audioPlayer->play('Mp4','alone.mp4');

$audioPlayer->play('vlc','away.vlc');

$audioPlayer->play('avi','me.avi');