interface/modules/zend_modules/library/Zend/ModuleManager/Listener/ModuleDependencyCheckerListener.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\ModuleManager\Listener;
  11
  12 use Zend\ModuleManager\Exception;
  13 use Zend\ModuleManager\Feature\DependencyIndicatorInterface;
  14 use Zend\ModuleManager\ModuleEvent;
  15
  16 /**
  17  * Module resolver listener
  18  */
  19 class ModuleDependencyCheckerListener
  20 {
  21     /**
  22      * @var array of already loaded modules, indexed by module name
  23      */
  24     protected $loaded = array();
  25
  26     /**
  27      * @param \Zend\ModuleManager\ModuleEvent $e
  28      *
  29      * @throws Exception\MissingDependencyModuleException
  30      */
  31     public function __invoke(ModuleEvent $e)
  32     {
  33         $module = $e->getModule();
  34
  35         if ($module instanceof DependencyIndicatorInterface || method_exists($module, 'getModuleDependencies')) {
  36             $dependencies = $module->getModuleDependencies();
  37
  38             foreach ($dependencies as $dependencyModule) {
  39                 if (!isset($this->loaded[$dependencyModule])) {
  40                     throw new Exception\MissingDependencyModuleException(
  41                         sprintf(
  42                             'Module "%s" depends on module "%s", which was not initialized before it',
  43                             $e->getModuleName(),
  44                             $dependencyModule
  45                         )
  46                     );
  47                 }
  48             }
  49         }
  50
  51         $this->loaded[$e->getModuleName()] = true;
  52     }
  53 }