PHP 抽象工厂模式

抽象工厂模式 Abstract Factory Pattern，提供一个接口，用于创建相关或依赖对象的家族，而不需要明确指定具体类。

<?php
//定义比萨商店
abstract class PizzaStore{

  public function orderPizza($type){
    $Pizza = $this->createPizza($type);

    $Pizza->prepare();
    $Pizza->bake();
    $Pizza->cut();
    $Pizza->box();

    return $Pizza;
  }

  abstract protected function createPizza($type);
}

//纽约比萨店
class NYPizzaStore extends PizzaStore{

  public function createPizza($type){
    $Pizza = null;
    $PizzaIngredientFactory = new NYPizzaIngredientFactory();

    if ('cheese' == $type) {
      $Pizza = new CheesePizza($PizzaIngredientFactory);
    }elseif ('clam' == $type){
      $Pizza = new ClamPizza($PizzaIngredientFactory);
    }

    return $Pizza;
  }
}

//芝加哥比萨店
class ChicagoPizzaStore extends PizzaStore{

  public function createPizza($type){
    $Pizza = null;
    $PizzaIngredientFactory = new ChicagoPizzaIngredientFactory();

    if ('cheese' == $type) {
      $Pizza = new CheesePizza($PizzaIngredientFactory);
    }elseif ('clam' == $type){
      $Pizza = new ClamPizza($PizzaIngredientFactory);
    }

    return $Pizza;
  }
}

//原料工厂接口
interface PizzaIngredientFactory{
  public function createDough();
  public function createSauce();
  public function createCheese();
  public function createVeggies();
  public function createPepperoni();
  public function createClam();
}

//纽约原料工厂
class NYPizzaIngredientFactory implements PizzaIngredientFactory{
  public function createDough(){
    echo 'NY createDough<br />';
  }

  public function createSauce(){
    echo 'NY createSauce<br />';
  }

  public function createCheese(){
    echo 'NY createCheese<br />';
  }

  public function createVeggies(){
    echo 'NY createVeggies<br />';
  }

  public function createPepperoni(){
    echo 'NY createPepperoni<br />';
  }

  public function createClam(){
    echo 'NY createClam<br />';
  } 
}

//芝加哥原料工厂
class ChicagoPizzaIngredientFactory implements PizzaIngredientFactory{
  public function createDough(){
    echo 'Chicago createDough<br />';
  }

  public function createSauce(){
    echo 'Chicago createSauce<br />';
  }

  public function createCheese(){
    echo 'Chicago createCheese<br />';
  }

  public function createVeggies(){
    echo 'Chicago createVeggies<br />';
  }

  public function createPepperoni(){
    echo 'Chicago createPepperoni<br />';
  }

  public function createClam(){
    echo 'Chicago createClam<br />';
  }
}

//比萨类
abstract class Pizza{

  abstract public function prepare();

  public function bake(){
    echo 'bake<br />';
  }

  public function cut(){
    echo 'cut<br />';
  }

  public function box(){
    echo 'box<br />';
  }
}

//比萨1
class CheesePizza extends Pizza{
  public $PizzaIngredientFactory;

  public function __construct($PizzaIngredientFactory){
    $this->PizzaIngredientFactory = $PizzaIngredientFactory;
  }

  //向原料工厂请求原料
  public function prepare(){
    $this->PizzaIngredientFactory->createDough();
    $this->PizzaIngredientFactory->createSauce();
    $this->PizzaIngredientFactory->createCheese();
  }
}

//比萨2
class ClamPizza extends Pizza{
  public $PizzaIngredientFactory;

  public function __construct($PizzaIngredientFactory){
    $this->PizzaIngredientFactory = $PizzaIngredientFactory;
  }

  //向原料工厂请求原料
  public function prepare(){
    $this->PizzaIngredientFactory->createDough();
    $this->PizzaIngredientFactory->createSauce();
    $this->PizzaIngredientFactory->createCheese();
    $this->PizzaIngredientFactory->createClam();
  }
}

$NYPizzaStore = new NYPizzaStore();
$ChicagoPizzaStore = new ChicagoPizzaStore();

$NYPizzaStore->orderPizza('cheese');
$ChicagoPizzaStore->orderPizza('clam');

输出

NY createDough  
NY createSauce  
NY createCheese  
bake  
cut  
box  
Chicago createDough  
Chicago createSauce  
Chicago createCheese  
Chicago createClam  
bake  
cut  
box