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doctrine2/lib/Doctrine/ORM/Query/Parser/SelectClause.php
2009-01-15 16:10:22 +00:00

75 lines
2.7 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>.
*/
/**
* SelectClause ::= "SELECT" ["DISTINCT"] SelectExpression {"," SelectExpression}
*
* @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 2.0
* @version $Revision$
*/
class Doctrine_ORM_Query_Parser_SelectClause extends Doctrine_ORM_Query_ParserRule
{
protected $_AST = null;
protected $_selectExpressions = array();
public function syntax()
{
// SelectClause ::= "SELECT" ["DISTINCT"] SelectExpression {"," SelectExpression}
$this->_AST = $this->AST('SelectClause');
$this->_parser->match(Doctrine_ORM_Query_Token::T_SELECT);
// Inspecting if we are in a DISTINCT query
if ($this->_isNextToken(Doctrine_ORM_Query_Token::T_DISTINCT)) {
$this->_parser->match(Doctrine_ORM_Query_Token::T_DISTINCT);
$this->_AST->setIsDistinct(true);
}
// Process SelectExpressions (1..N)
$this->_selectExpressions[] = $this->parse('SelectExpression');
while ($this->_isNextToken(Doctrine_ORM_Query_Token::T_COMMA)) {
$this->_parser->match(Doctrine_ORM_Query_Token::T_COMMA);
$this->_selectExpressions[] = $this->parse('SelectExpression');
}
}
public function semantical()
{
// We need to validate each SelectExpression
for ($i = 0, $l = count($this->_selectExpressions); $i < $l; $i++) {
$this->_AST->addSelectExpression($this->_selectExpressions[$i]->semantical());
}
// Return AST node
return $this->_AST;
}
}