a.rb

<?php

/**
 * @file
 * Contains \Drupal\Core\Entity\EntityType.
 */

namespace Drupal\Core\Entity;

use Drupal\Component\Utility\Unicode;

/**
 * Provides an implementation of an entity type and its metadata.
 */
class EntityType implements EntityTypeInterface {

  /**
   * Indicates whether entities should be statically cached.
   *
   * @var bool
   */
  protected $static_cache;

  /**
   * Indicates whether the rendered output of entities should be cached.
   *
   * @var bool
   */
  protected $render_cache;

  /**
   * Indicates if the persistent cache of field data should be used.
   *
   * @var bool
   */
  protected $field_cache;

  /**
   * An array of entity keys.
   *
   * @var array
   */
  protected $entity_keys = array();

  /**
   * The unique identifier of this entity type.
   *
   * @var string
   */
  protected $id;

  /**
   * The name of the provider of this entity type.
   *
   * @var string
   */
  protected $provider;

  /**
   * The name of the entity type class.
   *
   * @var string
   */
  protected $class;

  /**
   * An array of controllers.
   *
   * @var array
   */
  protected $controllers = array();

  /**
   * The name of the default administrative permission.
   *
   * @var string
   */
  protected $admin_permission;

  /**
   * The permission granularity level.
   *
   * The allowed values are respectively "entity_type", "bundle" or FALSE.
   *
   * @var string|bool
   */
  protected $permission_granularity;

  /**
   * An array describing how the Field API can extract the information it needs
   * from the bundle objects for this type (e.g Vocabulary objects for terms;
   * not applicable for nodes):
   * - bundle: The name of the property that contains the name of the bundle
   *   object.
   *
   * This entry can be omitted if this type's bundles do not exist as standalone
   * objects.
   *
   * @var array
   */
  protected $bundle_keys = array();

  /**
   * Indicates whether fields can be attached to entities of this type.
   *
   * @var bool (optional)
   */
  protected $fieldable;

  /**
   * Link templates using the URI template syntax.
   *
   * @var array
   */
  protected $links = array();

  /**
   * The name of a callback that returns the label of the entity.
   *
   * @var string
   */
  protected $label_callback;

  /**
   * The name of the entity type which provides bundles.
   *
   * @var string
   */
  protected $bundle_entity_type;

  /**
   * The name of the entity type for which bundles are provided.
   *
   * @var string
   */
  protected $bundle_of;

  /**
   * The human-readable name of the entity bundles, e.g. Vocabulary.
   *
   * @var string
   */
  protected $bundle_label;

  /**
   * The name of the entity type's base table.
   *
   * @var string
   */
  protected $base_table;

  /**
   * The name of the entity type's revision data table.
   *
   * @var string
   */
  protected $revision_data_table;

  /**
   * The name of the entity type's revision table.
   *
   * @var string
   */
  protected $revision_table;

  /**
   * The name of the entity type's data table.
   *
   * @var string
   */
  protected $data_table;

  /**
   * Indicates whether entities of this type have multilingual support.
   *
   * @var bool
   */
  protected $translatable = FALSE;

  /**
   * Returns the config prefix used by the configuration entity type.
   *
   * @var string
   */
  protected $config_prefix;

  /**
   * The human-readable name of the type.
   *
   * @var string
   */
  protected $label;

  /**
   * A callable that can be used to provide the entity URI.
   *
   * @var callable
   */
  protected $uri_callback;

  /**
   * Constructs a new EntityType.
   *
   * @param array $definition
   *   An array of values from the annotation.
   */
  public function __construct($definition) {
    $this->definition = $definition;
  }

  /**
   * {@inheritdoc}
   */
  public function get($property, $default = NULL) {
    return isset($this->definition[$property]) ? $this->definition[$property] : $default;
  }

  /**
   * {@inheritdoc}
   */
  public function set($property, $value) {
    $this->definition[$property] = $value;
    return $this;
  }

  /**
   * {@inheritdoc}
   */
  public function isStaticallyCacheable() {
    return $this->get('static_cache', TRUE);
  }

  /**
   * {@inheritdoc}
   */
  public function isRenderCacheable() {
    return $this->get('render_cache', TRUE);
  }

  /**
   * {@inheritdoc}
   */
  public function isFieldDataCacheable() {
    return $this->get('field_cache', TRUE);
  }

  /**
   * {@inheritdoc}
   */
  public function getKeys() {
    return $this->get('entity_keys') + array('revision' => '', 'bundle' => '');
  }

  /**
   * {@inheritdoc}
   */
  public function getKey($key) {
    $keys = $this->getKeys();
    return isset($keys[$key]) ? $keys[$key] : FALSE;
  }

  /**
   * {@inheritdoc}
   */
  public function hasKey($key) {
    $keys = $this->getKeys();
    return !empty($keys[$key]);
  }

  /**
   * {@inheritdoc}
   */
  public function id() {
    return $this->get('id');
  }

  /**
   * {@inheritdoc}
   */
  public function getProvider() {
    return $this->get('provider');
  }

  /**
   * {@inheritdoc}
   */
  public function getClass() {
    return $this->get('class');
  }

  /**
   * {@inheritdoc}
   */
  public function setClass($class) {
    $this->set('class', $class);
    return $this;
  }

  /**
   * {@inheritdoc}
   */
  public function isSubclassOf($class) {
    return is_subclass_of($this->getClass(), $class);
  }

  /**
   * {@inheritdoc}
   */
  public function getControllers() {
    return $this->get('controllers') + array(
      'access' => 'Drupal\Core\Entity\EntityAccessController',
    );
  }

  /**
   * {@inheritdoc}
   */
  public function getController($controller_type) {
    $controllers = $this->getControllers();
    return $controllers[$controller_type];
  }

  /**
   * {@inheritdoc}
   */
  public function setController($controller_type, $value) {
    $controllers = $this->getControllers();
    $controllers[$controller_type] = $value;
    $this->set('controllers', $controllers);
    return $this;
  }

  /**
   * {@inheritdoc}
   */
  public function hasController($controller_type) {
    $controllers = $this->getControllers();
    return isset($controllers[$controller_type]);
  }

  /**
   * {@inheritdoc}
   */
  public function setForm($operation, $class) {
    $this->controllers['form'][$operation] = $class;
    return $this;
  }

  /**
   * {@inheritdoc}
   */
  public function setList($class) {
    $this->controllers['list'] = $class;
    return $this;
  }

  /**
   * {@inheritdoc}
   */
  public function getAdminPermission() {
    return $this->get('admin_permission', FALSE);
  }

  /**
   * {@inheritdoc}
   */
  public function getPermissionGranularity() {
    return $this->get('permission_granularity', 'entity_type');
  }

  /**
   * {@inheritdoc}
   */
  public function getBundleKeys() {
    return $this->get('bundle_keys', array());
  }

  /**
   * {@inheritdoc}
   */
  public function getBundleKey($name) {
    return isset($this->bundle_keys[$name]) ? $this->bundle_keys[$name] : FALSE;
  }

  /**
   * {@inheritdoc}
   */
  public function isFieldable() {
    return $this->get('fieldable', FALSE);
  }

  /**
   * {@inheritdoc}
   */
  public function getLinkTemplates() {
    return $this->get('links', array());
  }

  /**
   * {@inheritdoc}
   */
  public function getLinkTemplate($key) {
    $links = $this->getLinkTemplates();
    return isset($links[$key]) ? $links[$key] : FALSE;
  }

  /**
   * {@inheritdoc}
   */
  public function hasLinkTemplate($key) {
    $links = $this->getLinkTemplates();
    return isset($links[$key]);
  }

  /**
   * {@inheritdoc}
   */
  public function setLinkTemplate($key, $route_name) {
    $this->links[$key] = $route_name;
    return $this;
  }

  /**
   * {@inheritdoc}
   */
  public function getLabelCallback() {
    return $this->get('label_callback', FALSE);
  }

  /**
   * {@inheritdoc}
   */
  public function setLabelCallback($callback) {
    $this->set('label_callback', $callback);
    return $this;
  }

  /**
   * {@inheritdoc}
   */
  public function hasLabelCallback() {
    return isset($this->label_callback);
  }

  /**
   * {@inheritdoc}
   */
  public function getBundleEntityType() {
    return $this->get('bundle_entity_type', 'bundle');
  }

  /**
   * {@inheritdoc}
   */
  public function getBundleOf() {
    return $this->get('bundle_of', FALSE);
  }

  /**
   * {@inheritdoc}
   */
  public function getBundleLabel() {
    return $this->get('bundle_label', FALSE);
  }

  /**
   * {@inheritdoc}
   */
  public function getBaseTable() {
    return $this->get('base_table', FALSE);
  }

  /**
   * {@inheritdoc}
   */
  public function isTranslatable() {
    return $this->get('translatable', FALSE);
  }

  /**
   * {@inheritdoc}
   */
  public function getConfigPrefix() {
    return $this->get('config_prefix', FALSE);
  }

  /**
   * {@inheritdoc}
   */
  public function getRevisionDataTable() {
    return $this->get('revision_data_table', FALSE);
  }

  /**
   * {@inheritdoc}
   */
  public function getRevisionTable() {
    return $this->get('revision_table', FALSE);
  }

  /**
   * {@inheritdoc}
   */
  public function getDataTable() {
    return $this->get('data_table', FALSE);
  }

  /**
   * {@inheritdoc}
   */
  public function getLabel() {
    return $this->get('label', '');
  }

  /**
   * {@inheritdoc}
   */
  public function getLowercaseLabel() {
    return Unicode::strtolower($this->getLabel());
  }

  /**
   * {@inheritdoc}
   */
  public function getUriCallback() {
    return $this->get('uri_callback', FALSE);
  }

  /**
   * {@inheritdoc}
   */
  public function setUriCallback($callback) {
    $this->set('uri_callback', $callback);
    return $this;
  }

}