%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
/**
* SetProcessor.php
*
* This file implements the processor for the SET 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__) . '/AbstractProcessor.php');
require_once(dirname(__FILE__) . '/ExpressionListProcessor.php');
require_once(dirname(__FILE__) . '/../utils/ExpressionType.php');
/**
*
* This class processes the SET statements.
*
* @author arothe
*
*/
class SetProcessor extends AbstractProcessor {
private $expressionListProcessor;
public function __construct() {
$this->expressionListProcessor = new ExpressionListProcessor();
}
/**
* A SET list is simply a list of key = value expressions separated by comma (,).
* This function produces a list of the key/value expressions.
*/
protected function getAssignment($base_expr) {
$assignment = $this->expressionListProcessor->process($this->splitSQLIntoTokens($base_expr));
return array('expr_type' => ExpressionType::EXPRESSION, 'base_expr' => trim($base_expr),
'sub_tree' => $assignment);
}
public function process($tokens, $isUpdate = false) {
$result = array();
$baseExpr = "";
$assignment = false;
$varType = false;
foreach ($tokens as $token) {
$upper = strtoupper(trim($token));
switch ($upper) {
case 'LOCAL':
case 'SESSION':
case 'GLOBAL':
if (!$isUpdate) {
$varType = $this->getVariableType("@@" . $upper . ".");
$baseExpr = "";
continue 2;
}
break;
case ',':
$assignment = $this->getAssignment($baseExpr);
if (!$isUpdate && $varType !== false) {
$assignment['sub_tree'][0]['expr_type'] = $varType;
}
$result[] = $assignment;
$baseExpr = "";
$varType = false;
continue 2;
default:
}
$baseExpr .= $token;
}
if (trim($baseExpr) !== "") {
$assignment = $this->getAssignment($baseExpr);
if (!$isUpdate && $varType !== false) {
$assignment['sub_tree'][0]['expr_type'] = $varType;
}
$result[] = $assignment;
}
return $result;
}
}
?>
Zerion Mini Shell 1.0