FieldTypePluginManagerInterface.php

<?php

namespace Drupal\Core\Field;

use Drupal\Component\Plugin\CategorizingPluginManagerInterface;
use Drupal\Component\Plugin\PluginManagerInterface;
use Drupal\Core\Entity\FieldableEntityInterface;

/**
 * Defines an interface for the field type plugin manager.
 *
 * @ingroup field_types
 */
interface FieldTypePluginManagerInterface extends PluginManagerInterface, CategorizingPluginManagerInterface {
    
    /**
     * Creates a new field item list.
     *
     * The provided entity is assigned as the parent of the created item list.
     * However, it is the responsibility of the caller (usually the parent entity
     * itself) to make the parent aware of the field as a new child.
     *
     * @param \Drupal\Core\Entity\FieldableEntityInterface $entity
     *   The entity this field item list will be part of.
     * @param string $field_name
     *   The name of the field.
     * @param mixed $values
     *   (optional) The data value. If set, it has to match one of the supported
     *   data type format as documented for the data type classes.
     *
     * @return \Drupal\Core\Field\FieldItemListInterface
     *   The instantiated object.
     */
    public function createFieldItemList(FieldableEntityInterface $entity, $field_name, $values = NULL);
    
    /**
     * Creates a new field item as part of a field item list.
     *
     * The provided item list is assigned as the parent of the created item. It
     * However, it is the responsibility of the caller (usually the parent list
     * itself) to have the parent aware of the item as a new child.
     *
     * @param \Drupal\Core\Field\FieldItemListInterface $items
     *   The field item list, for which to create a new item.
     * @param int $index
     *   The list index at which the item is created.
     * @param array|null $values
     *   (optional) The values to assign to the field item properties.
     *
     * @return \Drupal\Core\Field\FieldItemInterface
     *   The instantiated object.
     */
    public function createFieldItem(FieldItemListInterface $items, $index, $values = NULL);
    
    /**
     * Returns the default field-level settings for a field type.
     *
     * @param string $type
     *   A field type name.
     *
     * @return array
     *   The field's default settings, as provided by the plugin definition, or
     *   an empty array if type or settings are undefined.
     */
    public function getDefaultFieldSettings($type);
    
    /**
     * Returns the default storage-level settings for a field type.
     *
     * @param string $type
     *   A field type name.
     *
     * @return array
     *   The type's default settings, as provided by the plugin definition, or an
     *   empty array if type or settings are undefined.
     */
    public function getDefaultStorageSettings($type);
    
    /**
     * Gets the definition of all field types that can be added via UI.
     *
     * @return array
     *   An array of field type definitions.
     */
    public function getUiDefinitions();
    
    /**
     * Returns preconfigured field options for a field type.
     *
     * This is a wrapper around
     * \Drupal\Core\Field\PreconfiguredFieldUiOptionsInterface::getPreconfiguredOptions()
     * allowing modules to alter the result of this method by implementing
     * hook_field_ui_preconfigured_options_alter().
     *
     * @param string $field_type
     *   The field type plugin ID.
     *
     * @return array
     *   A multi-dimensional array as returned from
     *   \Drupal\Core\Field\PreconfiguredFieldUiOptionsInterface::getPreconfiguredOptions().
     *
     * @see \Drupal\Core\Field\PreconfiguredFieldUiOptionsInterface::getPreconfiguredOptions()
     * @see hook_field_ui_preconfigured_options_alter()
     */
    public function getPreconfiguredOptions($field_type);
    
    /**
     * Returns the PHP class that implements the field type plugin.
     *
     * @param string $type
     *   A field type name.
     *
     * @return string
     *   Field type plugin class name.
     *
     * @throws \Drupal\Component\Plugin\Exception\PluginNotFoundException
     *   Thrown if the field type plugin name is invalid.
     */
    public function getPluginClass($type);

}