vendor/doctrine/instantiator/src/Doctrine/Instantiator/Instantiator.php

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<?php
/*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the MIT license. For more information, see
 * <http://www.doctrine-project.org>.
 */

namespace Doctrine\Instantiator;

use Closure;
use Doctrine\Instantiator\Exception\InvalidArgumentException;
use Doctrine\Instantiator\Exception\UnexpectedValueException;
use Exception;
use ReflectionClass;

/**
 * {@inheritDoc}
 *
 * @author Marco Pivetta <ocramius@gmail.com>
 */
final class Instantiator implements InstantiatorInterface
{
    /**
     * Markers used internally by PHP to define whether {@see \unserialize} should invoke
     * the method {@see \Serializable::unserialize()} when dealing with classes implementing
     * the {@see \Serializable} interface.
     */
    const SERIALIZATION_FORMAT_USE_UNSERIALIZER   = 'C';
    const SERIALIZATION_FORMAT_AVOID_UNSERIALIZER = 'O';

    /**
     * @var \Closure[] of {@see \Closure} instances used to instantiate specific classes
     */
    private static $cachedInstantiators = array();

    /**
     * @var object[] of objects that can directly be cloned
     */
    private static $cachedCloneables = array();

    /**
     * {@inheritDoc}
     */
    public function instantiate($className)
    {
        if (isset(self::$cachedCloneables[$className])) {
            return clone self::$cachedCloneables[$className];
        }