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<?php
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//
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// +----------------------------------------------------------------------+
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// | PEAR :: DB_NestedSet_MDB                                             |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2003 The PHP Group                                |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 2.0 of the PHP license,       |
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// | that is bundled with this package in the file LICENSE, and is        |
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// | available at through the world-wide-web at                           |
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// | http://www.php.net/license/2_02.txt.                                 |
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// | If you did not receive a copy of the PHP license and are unable to   |
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// | obtain it through the world-wide-web, please send a note to          |
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// | license@php.net so we can mail you a copy immediately.               |
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// +----------------------------------------------------------------------+
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// | Authors: Daniel Khan <dk@webcluster.at>                              |
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// +----------------------------------------------------------------------+
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// Thanks to Hans Lellelid for suggesting support for PEAR::MDB
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// and for his help in implementing this.
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//
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// $Id: MDB.php,v 1.7 2003/10/07 00:11:27 datenpunk Exp $
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//
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require_once 'MDB.php';
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// {{{ DB_NestedSet_MDB:: class
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/**
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* Wrapper class for PEAR::MDB
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*
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* @author       Daniel Khan <dk@webcluster.at>
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* @package      DB_NestedSet
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* @version      $Revision: 1.7 $
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* @access       public
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*/
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// }}}
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class DB_NestedSet_MDB extends DB_NestedSet {
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    // {{{ properties
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    /**
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    * @var object The MDB object
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    */
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    var $db;
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    // }}}
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    // {{{ constructor
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    /**
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    * Constructor
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    *
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    * @param mixed $dsn DSN as PEAR dsn URI or dsn Array
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    * @param array $params Database column fields which should be returned
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    *
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    */
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    function DB_NestedSet_MDB($dsn, $params = array())
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    {
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        $this->_debugMessage('DB_NestedSet_MDB($dsn, $params = array())');
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        $this->DB_NestedSet($params);
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        $this->db =& $this->_db_Connect($dsn);
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        $this->db->setFetchMode(MDB_FETCHMODE_ASSOC);
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    }
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    // }}}
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    // {{{ destructor
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    /**
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    * Destructor
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    */
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    function _DB_NestedSet_MDB()
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    {
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        $this->_debugMessage('_DB_NestedSet_MDB()');
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        $this->_DB_NestedSet();
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        $this->_db_Disconnect();
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    }
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    // }}}
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    // {{{ _db_Connect()
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    /**
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    * Connects to the db
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    *
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    * @return object DB The database object
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    * @access private
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    */
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    function &_db_Connect($dsn)
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    {
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        $this->_debugMessage('_db_Connect($dsn)');
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        if (is_object($this->db)) {
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            return $this->db;
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        }
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        $db =& MDB::connect($dsn);
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        $this->_testFatalAbort($db, __FILE__, __LINE__);
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        return $db;
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    }
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    // }}}
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    function _isDBError($err) {
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        if(!MDB::isError($err)) {
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            return false;
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        }
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        return true;
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    }
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    function _numRows($res) {
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        return $this->db->numRows($res);
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    }
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    function _quote($str) {
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        return $this->db->getTextValue($str);
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    }
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    // {{{ _db_Disconnect()
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    /**
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    * Disconnects from db
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    *
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    * @return void
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    * @access private
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    */
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    function _db_Disconnect()
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    {
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        $this->_debugMessage('_db_Disconnect()');
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        if (is_object($this->db)) {
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            @$this->db->disconnect();
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        }
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        return true;
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    }
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    // }}}
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}
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?>