protected function DataProducerProxy::prepare in GraphQL 8.4

Instantiate the actual data producer and populate it with context values.

Parameters

mixed $value:

mixed $args:

\Drupal\graphql\GraphQL\Execution\ResolveContext $context:

\GraphQL\Type\Definition\ResolveInfo $info:

\Drupal\graphql\GraphQL\Execution\FieldContext $field:

Return value

\GraphQL\Deferred|\Drupal\graphql\Plugin\DataProducerPluginInterface

Throws

\Drupal\Component\Plugin\Exception\PluginException

\Exception

1 call to DataProducerProxy::prepare()

DataProducerProxy::resolve in src/Plugin/GraphQL/DataProducer/DataProducerProxy.php

Resolve field value.

File

src/Plugin/GraphQL/DataProducer/DataProducerProxy.php, line 199

Class

DataProducerProxy

A proxy class that lazy resolves data producers and has a result cache.

Namespace

Drupal\graphql\Plugin\GraphQL\DataProducer

Code

protected function prepare($value, $args, ResolveContext $context, ResolveInfo $info, FieldContext $field) {

  /** @var \Drupal\graphql\Plugin\DataProducerPluginInterface $plugin */
  $plugin = $this->pluginManager
    ->createInstance($this->id, $this->config);
  $contexts = $plugin
    ->getContextDefinitions();
  $values = [];
  foreach ($contexts as $name => $definition) {
    $mapper = $this->mapping[$name] ?? NULL;
    if ($definition
      ->isRequired() && empty($mapper)) {
      throw new \LogicException(sprintf('Missing input mapper for argument %s.', $name));
    }
    if (!empty($mapper) && !$mapper instanceof ResolverInterface) {
      throw new \Exception(sprintf('Invalid input mapper for argument %s.', $name));
    }
    $values[$name] = !empty($mapper) ? $mapper
      ->resolve($value, $args, $context, $info, $field) : NULL;
  }
  $values = DeferredUtility::waitAll($values);
  return DeferredUtility::returnFinally($values, function ($values) use ($plugin) {
    foreach ($values as $name => $value) {
      $plugin
        ->setContextValue($name, $value);
    }
    return $plugin;
  });
}