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<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Form\Extension\Core\DataAccessor;

use Symfony\Component\Form\DataAccessorInterface;
use Symfony\Component\Form\Exception\AccessException;
use Symfony\Component\Form\FormInterface;

/**
 * Writes and reads values to/from an object or array using callback functions.
 *
 * @author Yonel Ceruto <[email protected]>
 */
class CallbackAccessor implements DataAccessorInterface
{
    /**
     * {@inheritdoc}
     */
    public function getValue($data, FormInterface $form)
    {
        if (null === $getter = $form->getConfig()->getOption('getter')) {
            throw new AccessException('Unable to read from the given form data as no getter is defined.');
        }

        return ($getter)($data, $form);
    }

    /**
     * {@inheritdoc}
     */
    public function setValue(&$data, $value, FormInterface $form): void
    {
        if (null === $setter = $form->getConfig()->getOption('setter')) {
            throw new AccessException('Unable to write the given value as no setter is defined.');
        }

        ($setter)($data, $form->getData(), $form);
    }

    /**
     * {@inheritdoc}
     */
    public function isReadable($data, FormInterface $form): bool
    {
        return null !== $form->getConfig()->getOption('getter');
    }

    /**
     * {@inheritdoc}
     */
    public function isWritable($data, FormInterface $form): bool
    {
        return null !== $form->getConfig()->getOption('setter');
    }
}