%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
/**
* ReferenceDefinitionProcessor.php
*
* This file implements the processor reference definition part of the CREATE TABLE 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__) . '/IndexColumnListProcessor.php');
require_once(dirname(__FILE__) . '/../utils/ExpressionType.php');
/**
*
* This class processes the reference definition part of the CREATE TABLE statements.
*
* @author arothe
*/
class ReferenceDefinitionProcessor extends AbstractProcessor {
protected function buildReferenceDef($expr, $base_expr, $key) {
$expr['till'] = $key;
$expr['base_expr'] = $base_expr;
return $expr;
}
public function process($tokens) {
$expr = array('expr_type' => ExpressionType::REFERENCE, 'base_expr' => false, 'sub_tree' => array());
$base_expr = '';
foreach ($tokens as $key => $token) {
$trim = trim($token);
$base_expr .= $token;
if ($trim === '') {
continue;
}
$upper = strtoupper($trim);
switch ($upper) {
case ',':
# we stop on a single comma
# or at the end of the array $tokens
$expr = $this->buildReferenceDef($expr, trim(substr($base_expr, 0, -strlen($token))), $key - 1);
break 2;
case 'REFERENCES':
$expr['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
$currCategory = $upper;
break;
case 'MATCH':
if ($currCategory === 'REF_COL_LIST') {
$expr['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
$currCategory = 'REF_MATCH';
continue 2;
}
# else?
break;
case 'FULL':
case 'PARTIAL':
case 'SIMPLE':
if ($currCategory === 'REF_MATCH') {
$expr['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
$expr['match'] = $upper;
$currCategory = 'REF_COL_LIST';
continue 2;
}
# else?
break;
case 'ON':
if ($currCategory === 'REF_COL_LIST') {
$expr['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
$currCategory = 'REF_ACTION';
continue 2;
}
# else ?
break;
case 'UPDATE':
case 'DELETE':
if ($currCategory === 'REF_ACTION') {
$expr['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
$currCategory = 'REF_OPTION_' . $upper;
continue 2;
}
# else ?
break;
case 'RESTRICT':
case 'CASCADE':
if (strpos($currCategory, 'REF_OPTION_') === 0) {
$expr['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
$expr['on_' . strtolower(substr($currCategory, -6))] = $upper;
continue 2;
}
# else ?
break;
case 'SET':
case 'NO':
if (strpos($currCategory, 'REF_OPTION_') === 0) {
$expr['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
$expr['on_' . strtolower(substr($currCategory, -6))] = $upper;
$currCategory = 'SEC_' . $currCategory;
continue 2;
}
# else ?
break;
case 'NULL':
case 'ACTION':
if (strpos($currCategory, 'SEC_REF_OPTION_') === 0) {
$expr['sub_tree'][] = array('expr_type' => ExpressionType::RESERVED, 'base_expr' => $trim);
$expr['on_' . strtolower(substr($currCategory, -6))] .= ' ' . $upper;
$currCategory = 'REF_COL_LIST';
continue 2;
}
# else ?
break;
default:
switch ($currCategory) {
case 'REFERENCES':
if ($upper[0] === '(' && substr($upper, -1) === ')') {
# index_col_name list
$processor = new IndexColumnListProcessor();
$cols = $processor->process($this->removeParenthesisFromStart($trim));
$expr['sub_tree'][] = array('expr_type' => ExpressionType::COLUMN_LIST, 'base_expr' => $trim,
'sub_tree' => $cols);
$currCategory = 'REF_COL_LIST';
continue 3;
}
# foreign key reference table name
$expr['sub_tree'][] = array('expr_type' => ExpressionType::TABLE, 'table' => $trim,
'base_expr' => $trim, 'no_quotes' => $this->revokeQuotation($trim));
continue 3;
default:
# else ?
break;
}
break;
}
}
if (!isset($expr['till'])) {
$expr = $this->buildReferenceDef($expr, trim($base_expr), -1);
}
return $expr;
}
}
?>
Zerion Mini Shell 1.0