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  foreach (field_info_field_map() as $field_name => $field_stub) {

    if ($field_stub['type'] == $field_type) {

      if (empty($entity_type) || in_array($entity_type, array_keys($field_stub['bundles']))) {

        $field = field_info_field($field_name);

      drupal_alter('commerce_currency_info', $currencies['all'], $language->language);

  // If a base table wasn't specified, attempt to read it from the query if

  // available, look for a table in the query's tables array that matches the

  // base table of the given entity type, or just default to the first table.

  if (!isset($base_table) && !$base_table = $query->getMetaData('base_table')) {

    // Initialize the base table to the first table in the array. If a table can

    // not be found that matches the entity type's base table, this will result

    // in an invalid query if the first table is not the table we expect,

    // forcing the caller to actually properly pass a base table in that case.

    $tables = $query->getTables();

    reset($tables);

    $base_table = key($tables);

    foreach ($tables as $table_info) {

      if (!($table_info instanceof SelectQueryInterface)) {

        // If this table matches the entity type's base table, use its table

        // alias as the base table for the purposes of bundle and ownership

        // access checks.

        if ($table_info['table'] == $entity_info['base table']) {

          $base_table = $table_info['alias'];

        }

      }

    }

  }

  // Prepare an OR container for conditions. Conditions will be added that seek

  // to grant access, meaning any particular type of permission check may grant

  // access even if none of the others apply. At the end of this function, if no

  // conditions have been added to the array, a condition will be added that

  // always returns FALSE (1 = 0).

  // In the event that the user has permission to view every bundle of the given

  // entity type, $really_restricted will remain FALSE, indicating that it is

  // safe to exit this function without applying any additional conditions. If

  // the user only had such permission for a subset of the defined bundles,

  // conditions representing those access checks would still be added.

/**

 * Implements hook_theme_registry_alter().

 *

 * The Entity API theme function template_preprocess_entity() assumes the

 * presence of a path key in an entity URI array, which isn't strictly required

 * by Drupal core itself. Until this is fixed in the Entity API code, we replace

 * that function with a Commerce specific version.

 *

 * @todo Remove when https://drupal.org/node/1934382 is resolved.

 */

function commerce_theme_registry_alter(&$theme_registry) {

  // Copy the preprocess functions array and remove the core preprocess function

  // along with the Entity API's and this module's.

  $functions = drupal_map_assoc($theme_registry['entity']['preprocess functions']);

  unset($functions['template_preprocess'], $functions['template_preprocess_entity'], $functions['commerce_preprocess_entity']);

  // Unshift the core preprocess function and the Commerce specific function so

  // they appear at the beginning of the array in the desired order.

  array_unshift($functions, 'template_preprocess', 'commerce_preprocess_entity');

  // Update the function list in the theme registry.

  $theme_registry['entity']['preprocess functions'] = array_values($functions);

}

/**

 * Processes variables for entity.tpl.php, replacing template_preprocess_entity().

 *

 * @see commerce_theme_registry_alter()

 * @todo Remove when https://drupal.org/node/1934382 is resolved.

 */

function commerce_preprocess_entity(&$variables) {

  $variables['view_mode'] = $variables['elements']['#view_mode'];

  $entity_type = $variables['elements']['#entity_type'];

  $variables['entity_type'] = $entity_type;

  $entity = $variables['elements']['#entity'];

  $variables[$variables['elements']['#entity_type']] = $entity;

  $info = entity_get_info($entity_type);

  $variables['title'] = check_plain(entity_label($entity_type, $entity));

  $uri = entity_uri($entity_type, $entity);

  $variables['url'] = $uri && isset($uri['path']) ? url($uri['path'], $uri['options']) : FALSE;

  if (isset($variables['elements']['#page'])) {

    // If set by the caller, respect the page property.

    $variables['page'] = $variables['elements']['#page'];

  }

  else {

    // Else, try to automatically detect it.

    $variables['page'] = $uri && isset($uri['path']) && $uri['path'] == $_GET['q'];

  }

  // Helpful $content variable for templates.

  $variables['content'] = array();

  foreach (element_children($variables['elements']) as $key) {

    $variables['content'][$key] = $variables['elements'][$key];

  }

  if (!empty($info['fieldable'])) {

    // Make the field variables available with the appropriate language.

    field_attach_preprocess($entity_type, $entity, $variables['content'], $variables);

  }

  list(, , $bundle) = entity_extract_ids($entity_type, $entity);

  // Gather css classes.

  $variables['classes_array'][] = drupal_html_class('entity-' . $entity_type);

  $variables['classes_array'][] = drupal_html_class($entity_type . '-' . $bundle);

  // Add RDF type and about URI.

  if (module_exists('rdf')) {

    $variables['attributes_array']['about'] = empty($uri['path']) ? NULL: url($uri['path']);

    $variables['attributes_array']['typeof'] = empty($entity->rdf_mapping['rdftype']) ? NULL : $entity->rdf_mapping['rdftype'];

  }

  // Add suggestions.

  $variables['theme_hook_suggestions'][] = $entity_type;

  $variables['theme_hook_suggestions'][] = $entity_type . '__' . $bundle;

  $variables['theme_hook_suggestions'][] = $entity_type . '__' . $bundle . '__' . $variables['view_mode'];

  if ($id = entity_id($entity_type, $entity)) {

    $variables['theme_hook_suggestions'][] = $entity_type . '__' . $id;

  }

}