/home/edulekha/studygroup.edulekha.com/ow_system_plugins/base/classes/page_cache_dao.php
<?php

/**
 * EXHIBIT A. Common Public Attribution License Version 1.0
 * The contents of this file are subject to the Common Public Attribution License Version 1.0 (the “License”);
 * you may not use this file except in compliance with the License. You may obtain a copy of the License at
 * http://www.oxwall.org/license. The License is based on the Mozilla Public License Version 1.1
 * but Sections 14 and 15 have been added to cover use of software over a computer network and provide for
 * limited attribution for the Original Developer. In addition, Exhibit A has been modified to be consistent
 * with Exhibit B. Software distributed under the License is distributed on an “AS IS” basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language
 * governing rights and limitations under the License. The Original Code is Oxwall software.
 * The Initial Developer of the Original Code is Oxwall Foundation (http://www.oxwall.org/foundation).
 * All portions of the code written by Oxwall Foundation are Copyright (c) 2011. All Rights Reserved.

 * EXHIBIT B. Attribution Information
 * Attribution Copyright Notice: Copyright 2011 Oxwall Foundation. All rights reserved.
 * Attribution Phrase (not exceeding 10 words): Powered by Oxwall community software
 * Attribution URL: http://www.oxwall.org/
 * Graphic Image as provided in the Covered Code.
 * Display of Attribution Information is required in Larger Works which are defined in the CPAL as a work
 * which combines Covered Code or portions thereof with code not governed by the terms of the CPAL.
 */

/**
 * Data Access Object for `user` table.
 *
 * @author Sardar Madumarov <madumarov@gmail.com>
 * @package ow_system_plugins.base.bol
 * @since 1.0
 */
abstract class BASE_CLASS_PageCacheDao extends OW_BaseDao
{

    protected $cachedItems = array( );

    protected function __construct()
    {
        parent::__construct();
    }

    public function findById( $id, $cacheLifeTime = 0, $tags = array( ) )
    {
        $id = intval($id);

        if ( empty($this->cachedItems[$id]) )
        {
            $this->cachedItems[$id] = parent::findById($id, $cacheLifeTime, $tags);
        }

        return $this->cachedItems[$id];
    }

    public function findByIdList( array $idList, $cacheLifeTime = 0, $tags = array( ) )
    {
        $idList = array_map('intval', $idList);

        $idsToRequire = array( );
        $result = array( );

        foreach ( $idList as $id )
        {
            if ( empty($this->cachedItems[$id]) )
            {
                $idsToRequire[] = $id;
            }
            else
            {
                $result[] = $this->cachedItems[$id];
            }
        }

        $items = array( );

        if ( !empty($idsToRequire) )
        {
            $items = parent::findByIdList($idsToRequire, $cacheLifeTime, $tags);
        }

        foreach ( $items as $item )
        {
            $result[] = $item;
            $this->cachedItems[(int) $item->getId()] = $item;
        }

        return $result;
    }

}