interface ParamConverterInterface in Drupal 8

Interface for parameter converters.

Classes implementing this interface are responsible for converting a path parameter to the object it represents.

Here is an example path: /admin/structure/block/manage/{block}

In this case, '{block}' would be the path parameter which should be turned into a block object representing the block in question.

ParamConverters are defined as services tagged with 'paramconverter', and are managed by the 'paramconverter_manager' service.

Hierarchy

• interface \Drupal\Core\ParamConverter\ParamConverterInterface

See also

Menu system

\Drupal\Core\ParamConverter\ParamConverterManagerInterface

\Drupal\Core\ParamConverter\EntityConverter

5 files declare their use of ParamConverterInterface

LanguageConverter.php in core/modules/language/src/LanguageConverter.php

LayoutTempstoreParamConverter.php in core/modules/layout_builder/src/Routing/LayoutTempstoreParamConverter.php

NodePreviewConverter.php in core/modules/node/src/ParamConverter/NodePreviewConverter.php

ResourceTypeConverter.php in core/modules/jsonapi/src/ParamConverter/ResourceTypeConverter.php

ViewUIConverter.php in core/modules/views_ui/src/ParamConverter/ViewUIConverter.php

File

core/lib/Drupal/Core/ParamConverter/ParamConverterInterface.php, line 25

Namespace

Drupal\Core\ParamConverter

interface ParamConverterInterface {

  /**
   * Converts path variables to their corresponding objects.
   *
   * @param mixed $value
   *   The raw value.
   * @param mixed $definition
   *   The parameter definition provided in the route options.
   * @param string $name
   *   The name of the parameter.
   * @param array $defaults
   *   The route defaults array.
   *
   * @return mixed|null
   *   The converted parameter value.
   */
  public function convert($value, $definition, $name, array $defaults);

  /**
   * Determines if the converter applies to a specific route and variable.
   *
   * @param mixed $definition
   *   The parameter definition provided in the route options.
   * @param string $name
   *   The name of the parameter.
   * @param \Symfony\Component\Routing\Route $route
   *   The route to consider attaching to.
   *
   * @return bool
   *   TRUE if the converter applies to the passed route and parameter, FALSE
   *   otherwise.
   */
  public function applies($definition, $name, Route $route);

}

Members

Name	Modifiers	Type	Description	Overrides
ParamConverterInterface::applies	public	function	Determines if the converter applies to a specific route and variable.	11
ParamConverterInterface::convert	public	function	Converts path variables to their corresponding objects.	11