* * This source file is subject to the MIT license that is bundled * with this source code in the file LICENSE. */ use Symfony\Component\Form\Exception\UnexpectedTypeException; /** * Default implementation of FieldFactoryInterface * * @author Bernhard Schussek * @see FieldFactoryInterface */ class FieldFactory implements FieldFactoryInterface { /** * A list of guessers for guessing field classes and options * @var array */ protected $guessers; /** * Constructor * * @param array $guessers A list of instances implementing * FieldFactoryGuesserInterface */ public function __construct(array $guessers) { foreach ($guessers as $guesser) { if (!$guesser instanceof FieldFactoryGuesserInterface) { throw new UnexpectedTypeException($guesser, 'FieldFactoryGuesserInterface'); } } $this->guessers = $guessers; } /** * @inheritDoc */ public function getInstance($object, $property, array $options = array()) { $guess = $this->guess(function ($guesser) use ($object, $property) { return $guesser->guessMaxLength($object, $property); }); $maxLength = $guess ? $guess->getValue() : null; $guess = $this->guess(function ($guesser) use ($object, $property) { return $guesser->guessClass($object, $property); }); if (!$guess) { throw new \RuntimeException(sprintf('No field could be guessed for property "%s" of class %s', $property, get_class($object))); } $class = $guess->getClass(); $textField = 'Symfony\Component\Form\TextField'; if (null !== $maxLength && ($class == $textField || is_subclass_of($class, $textField))) { $options = array_merge(array('max_length' => $maxLength), $options); } $options = array_merge($guess->getOptions(), $options); $field = new $class($property, $options); $guess = $this->guess(function ($guesser) use ($object, $property) { return $guesser->guessRequired($object, $property); }); if ($guess) { $field->setRequired($guess->getValue()); } return $field; } /** * Executes a closure for each guesser and returns the best guess from the * return values * * @param \Closure $closure The closure to execute. Accepts a guesser as * argument and should return a FieldFactoryGuess * instance * @return FieldFactoryGuess The guess with the highest confidence */ protected function guess(\Closure $closure) { $guesses = array(); foreach ($this->guessers as $guesser) { if ($guess = $closure($guesser)) { $guesses[] = $guess; } } return FieldFactoryGuess::getBestGuess($guesses); } }