76 lines
2.8 KiB
PHP
76 lines
2.8 KiB
PHP
<?php
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/*
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* $Id$
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.phpdoctrine.org>.
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*/
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/**
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* SelectExpression = (PathExpressionEndingWithAsterisk | Expression | "(" Subselect ")")
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* [["AS"] IdentificationVariable]
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*
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* @package Doctrine
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* @subpackage Query
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* @author Janne Vanhala <jpvanhal@cc.hut.fi>
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @link http://www.phpdoctrine.org
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* @since 1.0
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* @version $Revision$
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*/
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class Doctrine_Query_Production_SelectExpression extends Doctrine_Query_Production
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{
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private function _isPathExpressionEndingWithAsterisk()
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{
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$token = $this->_parser->lookahead;
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$this->_parser->getScanner()->resetPeek();
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while (($token['type'] === Doctrine_Query_Token::T_IDENTIFIER) || ($token['value'] === '.')) {
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$token = $this->_parser->getScanner()->peek();
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}
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return $token['value'] === '*';
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}
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private function _isSubquery()
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{
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$lookahead = $this->_parser->lookahead;
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$next = $this->_parser->getScanner()->peek();
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return $lookahead['value'] === '(' && $next['type'] === Doctrine_Query_Token::T_SELECT;
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}
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public function execute(array $params = array())
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{
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if ($this->_isPathExpressionEndingWithAsterisk()) {
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$this->PathExpressionEndingWithAsterisk();
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} elseif ($this->_isSubquery()) {
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$this->_parser->match('(');
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$this->Subselect();
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$this->_parser->match(')');
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} else {
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$this->Expression();
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}
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if ($this->_isNextToken(Doctrine_Query_Token::T_AS)) {
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$this->_parser->match(Doctrine_Query_Token::T_AS);
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$this->_parser->match(Doctrine_Query_Token::T_IDENTIFIER);
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} elseif ($this->_isNextToken(Doctrine_Query_Token::T_IDENTIFIER)) {
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$this->IdentificationVariable();
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}
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}
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}
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