interface/modules/zend_modules/library/Zend/ServiceManager/Proxy/LazyServiceFactory.php

   1 <?php
   2 /**
   3  * Zend Framework (http://framework.zend.com/)
   4  *
   5  * @link      http://github.com/zendframework/zf2 for the canonical source repository
   6  * @copyright Copyright (c) 2005-2013 Zend Technologies USA Inc. (http://www.zend.com)
   7  * @license   http://framework.zend.com/license/new-bsd New BSD License
   8  */
   9
  10 namespace Zend\ServiceManager\Proxy;
  11
  12 use ProxyManager\Factory\LazyLoadingValueHolderFactory;
  13
  14 use ProxyManager\Proxy\LazyLoadingInterface;
  15 use Zend\ServiceManager\DelegatorFactoryInterface;
  16 use Zend\ServiceManager\Exception;
  17 use Zend\ServiceManager\ServiceLocatorInterface;
  18
  19 /**
  20  * Delegator factory responsible of instantiating lazy loading value holder proxies of
  21  * given services at runtime
  22  *
  23  * @link https://github.com/Ocramius/ProxyManager/blob/master/docs/lazy-loading-value-holder.md
  24  */
  25 class LazyServiceFactory implements DelegatorFactoryInterface
  26 {
  27     /**
  28      * @var \ProxyManager\Factory\LazyLoadingValueHolderFactory
  29      */
  30     protected $proxyFactory;
  31
  32     /**
  33      * @var string[] map of service names to class names
  34      */
  35     protected $servicesMap;
  36
  37     /**
  38      * @param LazyLoadingValueHolderFactory $proxyFactory
  39      * @param string[]                      $servicesMap  a map of service names to class names of their
  40      *                                                    respective classes
  41      */
  42     public function __construct(LazyLoadingValueHolderFactory $proxyFactory, array $servicesMap)
  43     {
  44         $this->proxyFactory = $proxyFactory;
  45         $this->servicesMap  = $servicesMap;
  46     }
  47
  48     /**
  49      * {@inheritDoc}
  50      *
  51      * @return object|\ProxyManager\Proxy\LazyLoadingInterface|\ProxyManager\Proxy\ValueHolderInterface
  52      */
  53     public function createDelegatorWithName(ServiceLocatorInterface $serviceLocator, $name, $requestedName, $callback)
  54     {
  55         $initializer = function (& $wrappedInstance, LazyLoadingInterface $proxy) use ($callback) {
  56             $proxy->setProxyInitializer(null);
  57
  58             $wrappedInstance = call_user_func($callback);
  59
  60             return true;
  61         };
  62
  63         if (isset($this->servicesMap[$requestedName])) {
  64             return $this->proxyFactory->createProxy($this->servicesMap[$requestedName], $initializer);
  65         } elseif (isset($this->servicesMap[$name])) {
  66             return $this->proxyFactory->createProxy($this->servicesMap[$name], $initializer);
  67         }
  68
  69         throw new Exception\InvalidServiceNameException(
  70             sprintf('The requested service "%s" was not found in the provided services map', $requestedName)
  71         );
  72     }
  73 }