php原型模式

<?php

/**
 * 原型模式
 * prototype
 * 原型模式是工厂模式的变种，它通过clone进行，而不必为每个子类进行编码
 */

/**
 * 创建海洋
 */
class sea
{
    
}

class earthSea extends sea
{
    
}

class marsSea extends sea
{
    
}

/**
 * 创建陆地
 */
class plains
{
    
}

class earthPlains extends plains
{
    
}

class marsPlains extends plains
{
    
}

/**
 * 创建森林
 */
class forest
{
    
}

class earthForest extends forest
{
    
}

class marsForest extends forest
{
    
}

class terrainFactory
{

    private $sea;
    private $plains;
    private $forest;

    public function __construct(sea $sea, plains $plains, forest $forest)
    {
        $this->sea = $sea;
        $this->plains = $plains;
        $this->forest = $forest;
    }

    public function getSea()
    {
        return clone $this->sea;
    }

    public function getPlains()
    {
        return clone $this->plains;
    }

    public function getForest()
    {
        return clone $this->forest;
    }

}

$factory = new terrainFactory(new earthSea(), new earthPlains(), new earthForest());

print_r($factory->getSea());
print_r($factory->getPlains());
print_r($factory->getForest());