gistfile1.php

<?php

/**
 * @file
 * Definition of Drupal\Component\Plugin\Discovery\AnnotatedClassDiscovery.
 */

namespace Drupal\Core\Plugin\Discovery;

use Drupal\Component\Plugin\Discovery\DiscoveryInterface;
use Drupal\Core\Annotation\DirectoryIterator;
use ReflectionClass;
use Doctrine\Common\Annotations\AnnotationReader;
use Doctrine\Common\Annotations\AnnotationRegistry;
use Drupal\Core\Annotation\Plugin;

/**
 * A discovery mechanism finds annotated plugins in PSR-0 namespaces.
 */
class AnnotatedClassDiscovery implements DiscoveryInterface {
  function __construct($owner, $type) {
    $this->owner = $owner;
    $this->type = $type;
  }

  /**
   * Implements DiscoveryInterface::getDefinition().
   */
  public function getDefinition($plugin_id) {
    $plugins = $this->getDefinitions();
    return isset($plugins[$plugin_id]) ? $plugins[$plugin_id] : array();
  }

  /**
   * Implements DiscoveryInterface::getDefinitions().
   */
  public function getDefinitions() {
    $definitions = array();
    $reader = new AnnotationReader();
    AnnotationRegistry::registerAutoloadNamespace('Drupal\Core\Annotation', array(DRUPAL_ROOT . '/core/lib'));
    $namespaces = drupal_classloader()->getNamespaces();
    foreach ($namespaces as $ns => $namespace_dirs) {
      $ns = str_replace('\\', DIRECTORY_SEPARATOR, $ns);
      foreach ($namespace_dirs as $dir) {
        $prefix = implode(DIRECTORY_SEPARATOR, array(
          $ns,
          'Plugin',
          $this->owner,
          $this->type
        ));
        $dir .= DIRECTORY_SEPARATOR . $prefix;
        if (file_exists($dir)) {
          $directories = new DirectoryIterator($dir);
          foreach ($directories as $fileinfo) {
            if ($fileinfo->getExtension() == 'php') {
              $reflectionClass = new ReflectionClass(str_replace(DIRECTORY_SEPARATOR, '\\', "$prefix/". $fileinfo->getBasename('.php')));
              if ($annotation = $reader->getClassAnnotation($reflectionClass, 'Drupal\Core\Annotation\Plugin')) {
                $definition = $annotation->get();
                $definition['class'] = $reflectionClass->name;
                $definitions[$definition['plugin_id']] = $definition;
              }
            }
          }
        }
      }
    }
    return $definitions;
  }
}