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<?php
/**
 * ValuesProcessor.php
 *
 * This file implements the processor for the VALUES 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/ExpressionType.php');
require_once(dirname(__FILE__) . '/RecordProcessor.php');
require_once(dirname(__FILE__) . '/AbstractProcessor.php');

/**
 * 
 * This class processes the VALUES statements.
 * 
 * @author arothe
 * 
 */
class ValuesProcessor extends AbstractProcessor {

    private $recordProcessor;

    public function __construct() {
        $this->recordProcessor = new RecordProcessor();
    }

    public function process($tokens) {
        $unparsed = "";
        foreach ($tokens['VALUES'] as $k => $v) {
            if ($this->isWhitespaceToken($v)) {
                continue;
            }
            $unparsed .= $v;
        }

        $values = $this->splitSQLIntoTokens($unparsed);

        $parsed = array();
        foreach ($values as $k => $v) {
            if ($this->isCommaToken($v)) {
                unset($values[$k]);
            } else {
                $processor = new RecordProcessor();
                $values[$k] = array('expr_type' => ExpressionType::RECORD, 'base_expr' => $v,
                                    'data' => $this->recordProcessor->process($v));
            }
        }

        $tokens['VALUES'] = array_values($values);
        return $tokens;
    }

}
?>

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