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<?php
/**
* GroupByBuilder.php
*
* Builds the GROUP-BY clause.
*
* PHP version 5
*
* LICENSE:
* Copyright (c) 2010-2014 Justin Swanhart and André Rothe
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* @author André Rothe <andre.rothe@phosco.info>
* @copyright 2010-2014 Justin Swanhart and André Rothe
* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
* @version SVN: $Id: GroupByBuilder.php 830 2013-12-18 09:35:42Z phosco@gmx.de $
*
*/
require_once dirname(__FILE__) . '/../exceptions/UnableToCreateSQLException.php';
require_once dirname(__FILE__) . '/PositionBuilder.php';
require_once dirname(__FILE__) . '/ColumnReferenceBuilder.php';
require_once dirname(__FILE__) . '/FunctionBuilder.php';
/**
* This class implements the builder for the GROUP-BY clause.
* You can overwrite all functions to achieve another handling.
*
* @author André Rothe <andre.rothe@phosco.info>
* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
*
*/
class GroupByBuilder {
protected function buildColRef($parsed) {
$builder = new ColumnReferenceBuilder();
return $builder->build($parsed);
}
protected function buildPosition($parsed) {
$builder = new PositionBuilder();
return $builder->build($parsed);
}
protected function buildFunction($parsed) {
$builder = new FunctionBuilder();
return $builder->build($parsed);
}
public function build($parsed) {
$sql = "";
foreach ($parsed as $k => $v) {
$len = strlen($sql);
$sql .= $this->buildColRef($v);
$sql .= $this->buildPosition($v);
$sql .= $this->buildFunction($v);
if ($len == strlen($sql)) {
throw new UnableToCreateSQLException('GROUP', $k, $v, 'expr_type');
}
$sql .= ", ";
}
$sql = substr($sql, 0, -2);
return "GROUP BY " . $sql;
}
}
?>
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