99 lines
3.4 KiB
PHP
99 lines
3.4 KiB
PHP
<?php
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/**
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* IndexColumnListProcessor.php
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*
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* This file implements the processor for index column lists.
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*
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* Copyright (c) 2010-2012, Justin Swanhart
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* with contributions by André Rothe <arothe@phosco.info, phosco@gmx.de>
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*/
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require_once(dirname(__FILE__) . '/AbstractProcessor.php');
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require_once(dirname(__FILE__) . '/../utils/ExpressionType.php');
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/**
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*
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* This class processes the index column lists.
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*
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* @author arothe
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*
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*/
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class IndexColumnListProcessor extends AbstractProcessor {
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protected function initExpression() {
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return array('name' => false, 'no_quotes' => false, 'length' => false, 'dir' => false);
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}
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public function process($sql) {
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$tokens = $this->splitSQLIntoTokens($sql);
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$expr = $this->initExpression();
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$result = array();
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$base_expr = "";
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foreach ($tokens as $k => $token) {
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$trim = trim($token);
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$base_expr .= $token;
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if ($trim === "") {
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continue;
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}
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$upper = strtoupper($trim);
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switch ($upper) {
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case 'ASC':
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case 'DESC':
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# the optional order
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$expr['dir'] = $trim;
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break;
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case ',':
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# the next column
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$result[] = array_merge(array('expr_type' => ExpressionType::INDEX_COLUMN, 'base_expr' => $base_expr),
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$expr);
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$expr = $this->initExpression();
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$base_expr = "";
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break;
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default:
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if ($upper[0] === '(' && substr($upper, -1) === ')') {
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# the optional length
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$expr['length'] = $this->removeParenthesisFromStart($trim);
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continue 2;
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}
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# the col name
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$expr['name'] = $trim;
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$expr['no_quotes'] = $this->revokeQuotation($trim);
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break;
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}
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}
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$result[] = array_merge(array('expr_type' => ExpressionType::INDEX_COLUMN, 'base_expr' => $base_expr), $expr);
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return $result;
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}
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}
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?>
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