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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\Component\Plugin\Discovery\DiscoveryTrait. | |
| */ | |
| namespace Drupal\Component\Plugin\Discovery; | |
| use Drupal\Component\Plugin\Exception\PluginNotFoundException; | |
| /** | |
| * @see Drupal\Component\Plugin\Discovery\DiscoveryInterface | |
| */ | |
| trait DiscoveryTrait { | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| abstract public function getDefinitions(); | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function getDefinition($plugin_id, $exception_on_invalid = TRUE) { | |
| $definitions = $this->getDefinitions(); | |
| return $this->doGetDefinition($definitions, $plugin_id, $exception_on_invalid); | |
| } | |
| /** | |
| * Gets a specific plugin definition. | |
| * | |
| * @param array $definitions | |
| * An array of the available plugin definitions. | |
| * @param string $plugin_id | |
| * A plugin id. | |
| * @param bool $exception_on_invalid | |
| * (optional) If TRUE, an invalid plugin ID will throw an exception. | |
| * Defaults to FALSE. | |
| * | |
| * @return array|null | |
| * A plugin definition, or NULL if the plugin ID is invalid and | |
| * $exception_on_invalid is TRUE. | |
| * | |
| * @throws \Drupal\Component\Plugin\Exception\PluginNotFoundException | |
| * Thrown if $plugin_id is invalid and $exception_on_invalid is TRUE. | |
| */ | |
| protected function doGetDefinition(array $definitions, $plugin_id, $exception_on_invalid) { | |
| // Avoid using a ternary that would create a copy of the array. | |
| if (isset($definitions[$plugin_id])) { | |
| return $definitions[$plugin_id]; | |
| } | |
| elseif (!$exception_on_invalid) { | |
| return NULL; | |
| } | |
| throw new PluginNotFoundException($plugin_id, sprintf('The "%s" plugin does not exist.', $plugin_id)); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function hasDefinition($plugin_id) { | |
| return (bool) $this->getDefinition($plugin_id, FALSE); | |
| } | |
| } |