%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
/**
* DropProcessor.php
*
* This file implements the processor for the DROP statements.
*
* Copyright (c) 2010-2012, Justin Swanhart
* with contributions by André Rothe <arothe@phosco.info, phosco@gmx.de>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
require_once(dirname(__FILE__) . '/../utils/ExpressionToken.php');
require_once(dirname(__FILE__) . '/../utils/ExpressionType.php');
require_once(dirname(__FILE__) . '/AbstractProcessor.php');
/**
*
* This class processes the DROP statements.
*
* @author arothe
*
*/
class DropProcessor extends AbstractProcessor {
// TODO: we should enhance it to get the positions for the IF EXISTS keywords
// look into the CreateProcessor to get an idea.
public function process($tokenList) {
$skip = 0;
$warning = true;
$base_expr = "";
$expr_type = false;
$option = false;
$resultList = array();
foreach ($tokenList as $k => $v) {
$token = new ExpressionToken($k, $v);
if ($token->isWhitespaceToken()) {
continue;
}
if ($skip > 0) {
$skip --;
continue;
}
switch ($token->getUpper()) {
case 'VIEW':
case 'SCHEMA':
case 'DATABASE':
case 'TABLE':
$expr_type = strtolower($token->getTrim());
break;
case 'IF':
$warning = false;
$skip = 1;
break;
case 'TEMPORARY':
$expr_type = ExpressionType::TEMPORARY_TABLE;
$skip = 1;
break;
case 'RESTRICT':
case 'CASCADE':
$option = $token->getUpper();
break;
case ',':
$resultList[] = array('expr_type' => $expr_type, 'base_expr' => $base_expr);
$base_expr = "";
break;
default:
$base_expr .= $token->getToken();
}
}
if ($base_expr !== "") {
$resultList[] = array('expr_type' => $expr_type, 'base_expr' => $base_expr);
}
return array('option' => $option, 'warning' => $warning, 'object_list' => $resultList);
}
}
?>
Zerion Mini Shell 1.0