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<?php
// $Id: Element.php 12313 2013-09-15 21:14:35Z skenow $
//  ------------------------------------------------------------------------ //
//                XOOPS - PHP Content Management System                      //
//                    Copyright (c) 2000 XOOPS.org                           //
//                       <http://www.xoops.org/>                             //
//  ------------------------------------------------------------------------ //
//  This program is free software; you can redistribute it and/or modify     //
//  it under the terms of the GNU General Public License as published by     //
//  the Free Software Foundation; either version 2 of the License, or        //
//  (at your option) any later version.                                      //
//                                                                           //
//  You may not change or alter any portion of this comment or credits       //
//  of supporting developers from this source code or any supporting         //
//  source code which is considered copyrighted (c) material of the          //
//  original comment or credit authors.                                      //
//                                                                           //
//  This program is distributed in the hope that it will be useful,          //
//  but WITHOUT ANY WARRANTY; without even the implied warranty of           //
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            //
//  GNU General Public License for more details.                             //
//                                                                           //
//  You should have received a copy of the GNU General Public License        //
//  along with this program; if not, write to the Free Software              //
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA //
//  ------------------------------------------------------------------------ //
// Author: Kazumi Ono (AKA onokazu)                                          //
// URL: http://www.myweb.ne.jp/, http://www.xoops.org/, http://jp.xoops.org/ //
// Project: The XOOPS Project                                                //
// ------------------------------------------------------------------------- //
// Modified by: Nathan Dial                                                  //
// Date: 20 March 2003                                                       //
// Desc: added experimental LDAP filter generation code                      //
//       also refactored to remove about 20 lines of redundant code.         //
// ------------------------------------------------------------------------- //
/**
 * Criteria Base Class for composing Where clauses in SQL Queries
 *
 * @copyright   http://www.impresscms.org/ The ImpressCMS Project
 * @license     http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU General Public License (GPL)
 *
 * @category    ICMS
 * @package     Database
 * @subpackage  Criteria
 *
 * @author      modified by UnderDog <underdog@impresscms.org>
 * @version     SVN: $Id: Element.php 12313 2013-09-15 21:14:35Z skenow $
 */

defined("ICMS_ROOT_PATH") or die("ImpressCMS root path not defined");

/**
 * A criteria (grammar?) for a database query.
 *
 * Abstract base class should never be instantiated directly.
 *
 * @abstract
 * @category    ICMS
 * @package     Database
 * @subpackage  Criteria
 *
 * @author      Kazumi Ono  <onokazu@xoops.org>
 * @copyright   copyright (c) 2000-2007 XOOPS.org
 */
abstract class icms_db_criteria_Element {
    /**
     * Sort order
     * @var string
     */
    public $order = 'ASC';

    /**
     * @var string
     */
    public $sort = '';

    /**
     * Number of records to retrieve
     * @var int
     */
    public $limit = 0;

    /**
     * Offset of first record
     * @var int
     */
    public $start = 0;

    /**
     * @var string
     */
    public $groupby = '';

    /**
     * Constructor
     **/
    public function __construct(){}

    /**
     * Render the criteria element
     */
    abstract public function render();

    /**#@+
     * Accessor
     */
    /**
     * @param   string  $sort
     */
    public function setSort($sort) {
        $this->sort = $sort;
    }

    /**
     * @return  string
     */
    public function getSort() {
        return $this->sort;
    }

    /**
     * @param   string  $order
     */
    public function setOrder($order) {
        if ('DESC' == strtoupper($order)) {
            $this->order = 'DESC';
        }
    }

    /**
     * @return  string
     */
    public function getOrder() {
        return $this->order;
    }

    /**
     * @param   int $limit
     */
    public function setLimit($limit=0) {
        $this->limit = (int) ($limit);
    }

    /**
     * @return  int
     */
    public function getLimit() {
        return $this->limit;
    }

    /**
     * @param   int $start
     */
    public function setStart($start=0) {
        $this->start = (int) ($start);
    }

    /**
     * @return  int
     */
    public function getStart() {
        return $this->start;
    }

    /**
     * @param   string  $group
     */
    public function setGroupby($group) {
        $this->groupby = $group;
    }

    /**
     * @return  string
     */
    public function getGroupby() {
        return ' GROUP BY ' . $this->groupby;
    }
    /**#@-*/
}