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doctrine2/draft/Doctrine/Query/Production/SelectExpression.php

68 lines
2.5 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>.
*/
/**
* SelectExpression = (PathExpressionEndingWithAsterisk | Expression | "(" Subselect ")")
* [["AS"] IdentificationVariable]
*
* @package Doctrine
* @subpackage Query
* @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_SelectExpression extends Doctrine_Query_Production
{
private function _isPathExpressionEndingWithAsterisk()
{
$token = $this->_parser->lookahead;
$this->_parser->getScanner()->resetPeek();
while (($token['type'] === Doctrine_Query_Token::T_IDENTIFIER) || ($token['value'] === '.')) {
$token = $this->_parser->getScanner()->peek();
}
return $token['value'] === '*';
}
public function execute(array $params = array())
{
if ($this->_isPathExpressionEndingWithAsterisk()) {
$this->PathExpressionEndingWithAsterisk();
} elseif ($this->_isSubselect()) {
$this->_parser->match('(');
$this->Subselect();
$this->_parser->match(')');
} else {
$this->Expression();
}
if ($this->_isNextToken(Doctrine_Query_Token::T_AS)) {
$this->_parser->match(Doctrine_Query_Token::T_AS);
$this->_parser->match(Doctrine_Query_Token::T_IDENTIFIER);
} elseif ($this->_isNextToken(Doctrine_Query_Token::T_IDENTIFIER)) {
$this->IdentificationVariable();
}
}
}