php桥接模式的实例用法及代码分析

abstract class Colour
{
    
    abstract public function run();
}
 
 

class Black extends Colour
{
    public function run()
    {
        // TODO: Implement run() method.
        return '黑色';
    }
}
 
 

class White extends Colour
{
    public function run()
    {
        // TODO: Implement run() method.
        return '白色';
    }
}
 
 

class Red extends Colour
{
    public function run()
    {
        // TODO: Implement run() method.
        return '红色';
    }
}
 
 

abstract class Shape
{
    
    protected $colour;
 
 
    
    public function __construct(Colour $colour)
    {
        $this->colour = $colour;
    }
 
 
    
    abstract public function operation();
}
 
 

class Round extends Shape
{
    
    public function operation()
    {
        // TODO: Implement operation() method.
        echo $this->colour->run() . '圆形<br>';
    }
}
 
 

class Rectangle extends Shape
{
    
    public function operation()
    {
        // TODO: Implement operation() method.
        echo $this->colour->run() . '长方形<br>';
    }
}
 
 

class Square extends Shape
{
    
    public function operation()
    {
        // TODO: Implement operation() method.
        echo $this->colour->run() . '正方形<br>';
    }
}
 
 
// 客户端代码
// 白色圆形
$whiteRound = new Round(new White());
$whiteRound->operation();
 
// 黑色正方形
$blackSquare = new Square(new Black());
$blackSquare->operation();
 
// 红色长方形
$redRectangle = new Rectangle(new Red());
$redRectangle->operation();