function AttributeClassDiscovery::getDefinitions

Overrides DiscoveryTrait::getDefinitions

File

core/lib/Drupal/Component/Plugin/Discovery/AttributeClassDiscovery.php, line 59

Class

AttributeClassDiscovery

Defines a discovery mechanism to find plugins with attributes.

Namespace

Code

public function getDefinitions() {
  $definitions = [];
  // Search for classes within all PSR-4 namespace locations.
  foreach ($this->getPluginNamespaces() as $namespace => $dirs) {
    foreach ($dirs as $dir) {
      if (file_exists($dir)) {
        $iterator = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($dir, \RecursiveDirectoryIterator::SKIP_DOTS));
        foreach ($iterator as $fileinfo) {
          assert($fileinfo instanceof \SplFileInfo);
          if ($fileinfo->getExtension() === 'php') {
            if ($cached = $this->fileCache
              ->get($fileinfo->getPathName())) {
              if (isset($cached['id'])) {
                // Explicitly unserialize this to create a new object instance.
                $definitions[$cached['id']] = unserialize($cached['content']);
              }
              continue;
            }
            $sub_path = $iterator->getSubIterator()
              ->getSubPath();
            $sub_path = $sub_path ? str_replace(DIRECTORY_SEPARATOR, '\\', $sub_path) . '\\' : '';
            $class = $namespace . '\\' . $sub_path . $fileinfo->getBasename('.php');
            try {
              ['id' => $id, 'content' => $content] = $this->parseClass($class, $fileinfo);
              if ($id) {
                $definitions[$id] = $content;
                // Explicitly serialize this to create a new object instance.
                $this->fileCache
                  ->set($fileinfo->getPathName(), [
                  'id' => $id,
                  'content' => serialize($content),
                ]);
              }
              else {
                // Store a NULL object, so that the file is not parsed again.
                $this->fileCache
                  ->set($fileinfo->getPathName(), [
                  NULL,
                ]);
              }
            } catch (\Error $e) {
              if (!preg_match('/(Class|Interface) .* not found$/', $e->getMessage())) {
                throw $e;
              }
            }
          }
        }
      }
    }
  }
  // Plugin discovery is a memory expensive process due to reflection and the
  // number of files involved. Collect cycles at the end of discovery to be as
  // efficient as possible.
  gc_collect_cycles();
  return $definitions;
}