majestic/classes/pg_DBConnector.class.php

<?php
/**
 * Класс базы данных.
 * Возвращает идентификатор соединения
 *
 * @copyright
 * @link
 * @package Majestic
 * @subpackage DB
 * @since
 * @version SVN: $Id$
 * @filesource $URL$
 */
class DBConnector
{
    static private $handlers = array();
    static public $queries   = array();

    /**
     * Запрещаем new и клонирование
     */
    private function __construct(){}

    private function __clone(){}

    /**
     * Получение соединения.
     * Если соединение с такими параметрами уже есть - новое не создается.
     *
     * @param array $db_settings - массив настроек
     * @return resource - идентификатор соединения
     */
    static public function getConnect($db_settings)
    {
        $handler_name = self::getConnectionName($db_settings);

        if (isset(self::$handlers[$handler_name])) {
            return self::$handlers[$handler_name];
        }

        if (!$handler = pg_connect("host='".$db_settings['host']."' dbname='".$db_settings['database']."' user='".$db_settings['user']."' password='".$db_settings['password']."'")) {
            throw new MJException('Can\'t connect to DB '.pg_last_error(), 2);
        }

        return self::$handlers[$handler_name] = $handler;
    }

    static protected function getConnectionName($db_settings)
    {
        return $db_settings['host'] . '-' . $db_settings['database'];
    }

/////////

    static public function query($handler, $sql)
    {
        return pg_query($handler, $sql);
    }

    static public function escape($handler, $str)
    {
        return pg_escape_string($str);
    }

    static public function error($handler)
    {
        return pg_last_error($handler);
    }

    static public function free($result)
    {
        return pg_free_result($result);
    }

    static public function fetchObject($result, $class_name = false)
    {
        return $class_name ? pg_fetch_object($result, null, $class_name) : pg_fetch_object($result);
    }

    static public function numRows($result)
    {
        return pg_num_rows($result);
    }

    static public function affectedRows($handler, $result)
    {
        return pg_affected_rows($result);
    }

    static public function getId($handler)
    {
        return -1; //DISABLED FORM postgreSQL
    }

    static public function autocommit($handler, $switch)
    {
        throw new MJException('Autocommit disabled for postgreSQL Connector' ,1);
    }

    static public function commit($handler)
    {
        throw new MJException('Commit disabled for postgreSQL Connector' ,1);
    }

    static public function rollback($handler)
    {
        throw new MJException('Rollback disabled for postgreSQL Connector' ,1);
    }
}
?>