<?php

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

namespace Symfony\Component\Serializer\Mapping\Factory;

use Symfony\Component\Serializer\Exception\InvalidArgumentException;

/**
 * Resolves a class name.
 *
 * @internal
 *
 * @author Kévin Dunglas <dunglas@gmail.com>
 */
trait ClassResolverTrait
{
    /**
     * Gets a class name for a given class or instance.
     *
     * @param mixed $value
     *
     * @return string
     *
     * @throws InvalidArgumentException If the class does not exists
     */
    private function getClass($value)
    {
        if (is_string($value)) {
            if (!class_exists($value) && !interface_exists($value)) {
                throw new InvalidArgumentException(sprintf('The class or interface "%s" does not exist.', $value));
            }

            return ltrim($value, '\\');
        }

        if (!is_object($value)) {
            throw new InvalidArgumentException(sprintf('Cannot create metadata for non-objects. Got: "%s"', gettype($value)));
        }

        return get_class($value);
    }
}
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