function AttributeClassDiscovery::__construct

Constructs an AttributeClassDiscovery object.

Parameters

string $subdir: Either the plugin's subdirectory, for example 'Plugin/views/filter', or empty string if plugins are located at the top level of the namespace.

\Traversable $rootNamespacesIterator: An object that implements \Traversable which contains the root paths keyed by the corresponding namespace to look for plugin implementations. If $subdir is not an empty string, it will be appended to each namespace.

string $pluginDefinitionAttributeName: (optional) The name of the attribute that contains the plugin definition. Defaults to 'Drupal\Component\Plugin\Attribute\Plugin'.

Overrides AttributeClassDiscovery::__construct

File

core/lib/Drupal/Core/Plugin/Discovery/AttributeClassDiscovery.php, line 45

Class

AttributeClassDiscovery

Defines a discovery mechanism to find plugins using attributes.

Namespace

Code

public function __construct(string $subdir, \Traversable $rootNamespacesIterator, string $pluginDefinitionAttributeName = 'Drupal\\Component\\Plugin\\Attribute\\Plugin') {
    if ($subdir) {
        // Prepend a directory separator to $subdir,
        // if it does not already have one.
        if ('/' !== $subdir[0]) {
            $subdir = '/' . $subdir;
        }
        $this->directorySuffix = $subdir;
        $this->namespaceSuffix = str_replace('/', '\\', $subdir);
    }
    parent::__construct([], $pluginDefinitionAttributeName);
}