doctrine / orm

     *

     * @throws ORMInvalidArgumentException

     */

    public function addToIdentityMap($entity)

    {

        $classMetadata = $this->em->getClassMetadata(get_class($entity));

        $idHash        = implode(' ', $this->entityIdentifiers[spl_object_hash($entity)]);

        if ($idHash === '') {

            throw ORMInvalidArgumentException::entityWithoutIdentity($classMetadata->name, $entity);

        }

        $className = $classMetadata->rootEntityName;

        if (isset($this->identityMap[$className][$idHash])) {

            return false;

        }

        $this->identityMap[$className][$idHash] = $entity;

        return true;

    }

    /**

     * Gets the state of an entity with regard to the current unit of work.

     *

     * @throws ORMInvalidArgumentException

     */

    public function removeFromIdentityMap($entity)

    {

        $oid           = spl_object_hash($entity);

        $classMetadata = $this->em->getClassMetadata(get_class($entity));

        $idHash        = implode(' ', $this->entityIdentifiers[$oid]);

        if ($idHash === '') {

            throw ORMInvalidArgumentException::entityHasNoIdentity($entity, "remove from identity map");

        }

        $className = $classMetadata->rootEntityName;

        if (isset($this->identityMap[$className][$idHash])) {

            unset($this->identityMap[$className][$idHash]);

            unset($this->readOnlyObjects[$oid]);

            //$this->entityStates[$oid] = self::STATE_DETACHED;

            return true;

        }

        return false;

    }

    /**

     * INTERNAL: