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doctrine2/lib/Doctrine/Query/Production/AggregateExpression.php
2008-05-24 18:18:37 +00:00

85 lines
2.8 KiB
PHP

<?php
/*
* $Id$
*
* 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
* OWNER 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.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information, see
* <http://www.phpdoctrine.org>.
*/
/**
* AggregateExpression = ("AVG" | "MAX" | "MIN" | "SUM" | "COUNT") "(" ["DISTINCT"] Expression ")"
*
* @package Doctrine
* @subpackage Query
* @author Guilherme Blanco <guilhermeblanco@hotmail.com>
* @author Janne Vanhala <jpvanhal@cc.hut.fi>
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @link http://www.phpdoctrine.org
* @since 1.0
* @version $Revision$
*/
class Doctrine_Query_Production_AggregateExpression extends Doctrine_Query_Production
{
protected $_functionName;
protected $_isDistinct;
protected $_expression;
public function syntax($paramHolder)
{
// AggregateExpression = ("AVG" | "MAX" | "MIN" | "SUM" | "COUNT") "(" ["DISTINCT"] Expression ")"
$this->_isDistinct = false;
$token = $this->_parser->lookahead;
switch ($token['type']) {
case Doctrine_Query_Token::T_AVG:
case Doctrine_Query_Token::T_MAX:
case Doctrine_Query_Token::T_MIN:
case Doctrine_Query_Token::T_SUM:
case Doctrine_Query_Token::T_COUNT:
$this->_parser->match($token['type']);
$this->_functionName = strtoupper($token['value']);
break;
default:
$this->_parser->logError('AVG, MAX, MIN, SUM or COUNT');
break;
}
$this->_parser->match('(');
if ($this->_isNextToken(Doctrine_Query_Token::T_DISTINCT)) {
$this->_parser->match(Doctrine_Query_Token::T_DISTINCT);
$this->_isDistinct = true;
}
$this->_expression = $this->AST('Expression', $paramHolder);
$this->_parser->match(')');
}
public function buildSql()
{
return $this->_functionName
. '(' . (($this->_isDistinct) ? 'DISTINCT ' : '')
. $this->_expression->buildSql()
. ')';
}
}