128 lines
4.9 KiB
PHP
128 lines
4.9 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 Guilherme Blanco <guilhermeblanco@hotmail.com>
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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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protected $_leftExpression;
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protected $_isSubselect;
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protected $_identificationVariable;
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private $__columnAliasInSql;
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public function syntax($paramHolder)
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{
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// SelectExpression = (PathExpressionEndingWithAsterisk | Expression | "(" Subselect ")")
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// [["AS"] IdentificationVariable]
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$this->_isSubselect = false;
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if ($this->_isPathExpressionEndingWithAsterisk()) {
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$this->_leftExpression = $this->AST('PathExpressionEndingWithAsterisk', $paramHolder);
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} elseif(($this->_isSubselect = $this->_isSubselect()) === true) {
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$this->_parser->match('(');
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$this->_leftExpression = $this->AST('Subselect', $paramHolder);
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$this->_parser->match(')');
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} else {
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$this->_leftExpression = $this->AST('Expression', $paramHolder);
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}
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if ($this->_isNextToken(Doctrine_Query_Token::T_AS)) {
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$this->_parser->match(Doctrine_Query_Token::T_AS);
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}
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if ($this->_isNextToken(Doctrine_Query_Token::T_IDENTIFIER)) {
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$this->_identificationVariable = $this->AST('IdentificationVariable', $paramHolder);
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}
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}
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public function semantical($paramHolder)
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{
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// Here we inspect for duplicate IdentificationVariable, and if the
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// left expression needs the identification variable. If yes, check
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// its existance.
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if ($this->_leftExpression instanceof Doctrine_Query_Production_PathExpressionEndingWithAsterisk && $this->_identificationVariable !== null) {
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$this->_parser->semanticalError(
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"Cannot assign an identification variable to a path expression with asterisk (ie. foo.bar.* AS foobaz)."
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);
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}
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$this->_leftExpression->semantical($paramHolder);
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/*if ($this->_identificationVariable !== null) {
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if ($this->_leftExpression instanceof Doctrine_Query_Production_PathExpression) {
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// We bring the queryComponent from the class instance
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// $queryComponent = $this->_leftExpression->getQueryComponent();
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} else {
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// We bring the default queryComponent
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// $queryComponent = $parserResult->getQueryComponent(null);
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}
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$idx = count($queryComponent['scalar']);
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$this->__columnAliasInSql .= '__' . $idx;
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$queryComponent['scalar'][$idx] = $this->_identificationVariable;
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//$parserResult->setQueryComponent($componentAlias, $queryComponent);
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}*/
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// We need to add scalar in queryComponent the item alias if identificationvariable is set.
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//echo "SelectExpression:\n";
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//echo get_class($this->_leftExpression) . "\n";
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// The check for duplicate IdentificationVariable was already done
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}
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public function buildSql()
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{
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return $this->_leftExpression->buildSql();// . ' AS ' . (($this->_identificationVariable !== null) ? $this->_identificationVariable : '');
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}
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protected function _isPathExpressionEndingWithAsterisk()
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{
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$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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}
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