class LoaderChain

Calls multiple LoaderInterface instances in a chain

This class accepts multiple instances of LoaderInterface to be passed to the constructor. When loadClassMetadata() is called, the same method is called in <em>all</em> of these loaders, regardless of whether any of them was successful or not.

@author Bernhard Schussek <bschussek@gmail.com>

Hierarchy

Expanded class hierarchy of LoaderChain

2 files declare their use of LoaderChain
LoaderChainTest.php in drupal/core/vendor/symfony/validator/Symfony/Component/Validator/Tests/Mapping/Loader/LoaderChainTest.php
ValidatorBuilder.php in drupal/core/vendor/symfony/validator/Symfony/Component/Validator/ValidatorBuilder.php

File

drupal/core/vendor/symfony/validator/Symfony/Component/Validator/Mapping/Loader/LoaderChain.php, line 27

Namespace

Symfony\Component\Validator\Mapping\Loader
View source
class LoaderChain implements LoaderInterface {
  protected $loaders;

  /**
   * Accepts a list of LoaderInterface instances
   *
   * @param LoaderInterface[] $loaders An array of LoaderInterface instances
   *
   * @throws MappingException If any of the loaders does not implement LoaderInterface
   */
  public function __construct(array $loaders) {
    foreach ($loaders as $loader) {
      if (!$loader instanceof LoaderInterface) {
        throw new MappingException(sprintf('Class %s is expected to implement LoaderInterface', get_class($loader)));
      }
    }
    $this->loaders = $loaders;
  }

  /**
   * {@inheritDoc}
   */
  public function loadClassMetadata(ClassMetadata $metadata) {
    $success = false;
    foreach ($this->loaders as $loader) {
      $success = $loader
        ->loadClassMetadata($metadata) || $success;
    }
    return $success;
  }

}

Members

Namesort descending Modifiers Type Description Overrides
LoaderChain::$loaders protected property
LoaderChain::loadClassMetadata public function Load a Class Metadata. Overrides LoaderInterface::loadClassMetadata
LoaderChain::__construct public function Accepts a list of LoaderInterface instances 1