public function SearchApiAlterAddHierarchy::extractHierarchy in Search API 7

Extracts a hierarchy from a metadata wrapper by modifying $values.

1 call to SearchApiAlterAddHierarchy::extractHierarchy()

SearchApiAlterAddHierarchy::alterItems in includes/callback_add_hierarchy.inc

Alter items before indexing.

File

includes/callback_add_hierarchy.inc, line 195

Contains SearchApiAlterAddHierarchy.

Class

SearchApiAlterAddHierarchy

Adds all ancestors for hierarchical fields.

Code

public function extractHierarchy(EntityMetadataWrapper $wrapper, $property, array &$values) {
  if (search_api_is_list_type($wrapper
    ->type())) {
    foreach ($wrapper as $w) {
      $this
        ->extractHierarchy($w, $property, $values);
    }
    return;
  }
  try {
    $v = $wrapper
      ->value(array(
      'identifier' => TRUE,
    ));
    if ($v && !isset($values[$v])) {
      $values[$v] = $v;
      if (isset($wrapper->{$property}) && $wrapper
        ->value() && $wrapper->{$property}
        ->value()) {
        $this
          ->extractHierarchy($wrapper->{$property}, $property, $values);
      }
    }
  } catch (EntityMetadataWrapperException $e) {

    // Some properties like entity_metadata_book_get_properties() throw
    // exceptions, so we catch them here and ignore the property.
  }
}