<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Paginator

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Iterator.php 20096 2010-01-06 02:05:09Z bkarwin $

 */

/**

 * @see Zend_Paginator_Adapter_Interface

 */

require_once 'Zend/Paginator/Adapter/Interface.php';

/**

 * @see Zend_Paginator_SerializableLimitIterator

 */

require_once 'Zend/Paginator/SerializableLimitIterator.php';

/**

 * @category   Zend

 * @package    Zend_Paginator

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Paginator_Adapter_Iterator implements Zend_Paginator_Adapter_Interface

{

    /**

     * Iterator which implements Countable

     *

     * @var Iterator

     */

    protected $_iterator = null;

    /**

     * Item count

     *

     * @var integer

     */

    protected $_count = null;

    /**

     * Constructor.

     *

     * @param  Iterator $iterator Iterator to paginate

     * @throws Zend_Paginator_Exception

     */

    public function __construct(Iterator $iterator)

    {

        if (!$iterator instanceof Countable) {

            /**

             * @see Zend_Paginator_Exception

             */

            require_once 'Zend/Paginator/Exception.php';

            throw new Zend_Paginator_Exception('Iterator must implement Countable');

        }

        $this->_iterator = $iterator;

        $this->_count = count($iterator);

    }

    /**

     * Returns an iterator of items for a page, or an empty array.

     *

     * @param  integer $offset Page offset

     * @param  integer $itemCountPerPage Number of items per page

     * @return LimitIterator|array

     */

    public function getItems($offset, $itemCountPerPage)

    {

        if ($this->_count == 0) {

            return array();

        }

        // @link http://bugs.php.net/bug.php?id=49906 | ZF-8084

        // return new LimitIterator($this->_iterator, $offset, $itemCountPerPage);

        return new Zend_Paginator_SerializableLimitIterator($this->_iterator, $offset, $itemCountPerPage);

    }

    /**

     * Returns the total number of rows in the collection.

     *

     * @return integer

     */

    public function count()

    {

        return $this->_count;

    }

}