vendor/doctrine/common/lib/Doctrine/Common/Persistence/PersistentObject.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\Common\Persistence;

use Doctrine\Common\Persistence\Mapping\ClassMetadata;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;

/**
 * PersistentObject base class that implements getter/setter methods for all mapped fields and associations
 * by overriding __call.
 *
 * This class is a forward compatible implementation of the PersistentObject trait.
 *
 * Limitations:
 *
 * 1. All persistent objects have to be associated with a single ObjectManager, multiple
 *    ObjectManagers are not supported. You can set the ObjectManager with `PersistentObject#setObjectManager()`.
 * 2. Setters and getters only work if a ClassMetadata instance was injected into the PersistentObject.
 *    This is either done on `postLoad` of an object or by accessing the global object manager.
 * 3. There are no hooks for setters/getters. Just implement the method yourself instead of relying on __call().
 * 4. Slower than handcoded implementations: An average of 7 method calls per access to a field and 11 for an association.
 * 5. Only the inverse side associations get autoset on the owning side as well. Setting objects on the owning side
 *    will not set the inverse side associations.
 *
 * @example
 *
 *  PersistentObject::setObjectManager($em);
 *
 *  class Foo extends PersistentObject
 *  {
 *      private $id;
 *  }
 *
 *  $foo = new Foo();
 *  $foo->getId(); // method exists through __call
 *
 * @author Benjamin Eberlei <kontakt@beberlei.de>
 */
abstract class PersistentObject implements ObjectManagerAware
{
    /**
     * @var ObjectManager|null