Dataface/TableTool.php

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<?php
/*-------------------------------------------------------------------------------
 * Xataface Web Application Framework
 * Copyright (C) 2005-2008 Web Lite Solutions Corp (shannah@sfu.ca)
 * 
 * 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.
 * 
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *-------------------------------------------------------------------------------
 */
require_once 'Dataface/Application.php';
require_once 'Dataface/Table.php';

class Dataface_TableTool {
        
        var $_table;
        var $_app;
        
        function Dataface_TableTool($tablename){
                $this->_table =& Dataface_Table::loadTable($tablename);
                $this->_app =& Dataface_Application::getInstance();
        }
        
        public static function &getInstance($tablename){
                static $instances = array();
                if ( !isset($instances[$tablename]) ){
                        $instances[$tablename] = new Dataface_TableTool($tablename);
                }
                return $instances[$tablename];
        }
        
        
        function resolveLink($fieldname, &$record){
                if ( !is_a($record, 'Dataface_Record') ){
                        throw new Exception("Dataface_TableTool::resolveLink() expects an object of type 'Dataface_Record' as the second argument, but received '".get_class($record));
                }
                $link = $record->getLink($fieldname);
        
                if ( is_array($link) ){
                        return Dataface_LinkTool::buildLink($link);
                } else if ( $link ){
                        return $this->_app->filterUrl($link);
                } else {
                        return null;
                }
        
        }


}