public function FieldConfigBase::getItemDefinition in Drupal 9

Same name and namespace in other branches

1. 8 core/lib/Drupal/Core/Field/FieldConfigBase.php \Drupal\Core\Field\FieldConfigBase::getItemDefinition()
2. 10 core/lib/Drupal/Core/Field/FieldConfigBase.php \Drupal\Core\Field\FieldConfigBase::getItemDefinition()

Gets the data definition of an item of the list.

Return value

\Drupal\Core\TypedData\DataDefinitionInterface A data definition describing the list items.

Overrides ListDataDefinitionInterface::getItemDefinition

File

core/lib/Drupal/Core/Field/FieldConfigBase.php, line 514

Class

FieldConfigBase

Base class for configurable field definitions.

Namespace

Drupal\Core\Field

Code

public function getItemDefinition() {
  if (!isset($this->itemDefinition)) {
    $this->itemDefinition = FieldItemDataDefinition::create($this)
      ->setSettings($this
      ->getSettings());

    // Add any custom property constraints, overwriting as required.
    $item_constraints = $this->itemDefinition
      ->getConstraint('ComplexData') ?: [];
    foreach ($this->propertyConstraints as $name => $constraints) {
      if (isset($item_constraints[$name])) {
        $item_constraints[$name] = $constraints + $item_constraints[$name];
      }
      else {
        $item_constraints[$name] = $constraints;
      }
      $this->itemDefinition
        ->addConstraint('ComplexData', $item_constraints);
    }
  }
  return $this->itemDefinition;
}