Iterator.php

<?php
/*
 *  $Id$
 *
 * 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 LGPL. For more information, see
 * <http://www.phpdoctrine.org>.
 */

/**
 * Doctrine_Record_Iterator
 *
 * @package     Doctrine
 * @subpackage  Record
 * @author      Konsta Vesterinen <kvesteri@cc.hut.fi>
 * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
 * @link        www.phpdoctrine.org
 * @since       1.0
 * @version     $Revision$
 */
class Doctrine_Record_Iterator extends ArrayIterator
{
    /**
     * @var Doctrine_Record $record
     */
    private $record;

    /**
     * @var Doctrine_Null $null
     */
    private static $null;

    /**
     * constructor
     *
     * @param Doctrine_Record $record
     */
    public function __construct(Doctrine_Record $record)
    {
        $this->record = $record;
        parent::__construct($record->getData());
    }

    /**
     * initNullObject
     *
     * @param Doctrine_Null $null
     */
    public static function initNullObject(Doctrine_Null $null)
    {
        self::$null = $null;
    }

    /**
     * current
     *
     * @return mixed
     */
    public function current()
    {
        $value = parent::current();

        if ($value === self::$null) {
            return null;
        } else {
            return $value;
        }
    }
}