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<?php |
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/** |
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* Doctrine ORM |
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* |
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* LICENSE |
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* |
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* This source file is subject to the new BSD license that is bundled |
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* with this package in the file LICENSE.txt. |
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* If you did not receive a copy of the license and are unable to |
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* obtain it through the world-wide-web, please send an email |
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* to [email protected] so I can send you a copy immediately. |
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*/ |
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namespace Eccube\Doctrine\ORM\Tools\Pagination; |
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use Doctrine\ORM\Query\TreeWalkerAdapter; |
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use Doctrine\ORM\Query\AST\SelectStatement; |
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use Doctrine\ORM\Query\AST\SelectExpression; |
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use Doctrine\ORM\Query\AST\PathExpression; |
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use Doctrine\ORM\Query\AST\AggregateExpression; |
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/** |
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* Replaces the selectClause of the AST with a COUNT statement. |
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* |
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* @category DoctrineExtensions |
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* @package DoctrineExtensions\Paginate |
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* @author David Abdemoulaie <[email protected]> |
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* @copyright Copyright (c) 2010 David Abdemoulaie (http://hobodave.com/) |
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* @license http://hobodave.com/license.txt New BSD License |
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*/ |
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class CountWalker extends TreeWalkerAdapter |
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{ |
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/** |
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* Distinct mode hint name. |
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*/ |
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const HINT_DISTINCT = 'doctrine_paginator.distinct'; |
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/** |
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* Walks down a SelectStatement AST node, modifying it to retrieve a COUNT. |
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* |
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* @param SelectStatement $AST |
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* |
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* @return void |
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* |
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* @throws \RuntimeException |
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*/ |
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public function walkSelectStatement(SelectStatement $AST) |
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{ |
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if ($AST->havingClause) { |
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throw new \RuntimeException('Cannot count query that uses a HAVING clause. Use the output walkers for pagination'); |
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} |
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$queryComponents = $this->_getQueryComponents(); |
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// Get the root entity and alias from the AST fromClause |
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$from = $AST->fromClause->identificationVariableDeclarations; |
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if (count($from) > 1) { |
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throw new \RuntimeException("Cannot count query which selects two FROM components, cannot make distinction"); |
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} |
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$fromRoot = reset($from); |
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$rootAlias = $fromRoot->rangeVariableDeclaration->aliasIdentificationVariable; |
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$rootClass = $queryComponents[$rootAlias]['metadata']; |
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$identifierFieldName = $rootClass->getSingleIdentifierFieldName(); |
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$pathType = PathExpression::TYPE_STATE_FIELD; |
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if (isset($rootClass->associationMappings[$identifierFieldName])) { |
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$pathType = PathExpression::TYPE_SINGLE_VALUED_ASSOCIATION; |
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} |
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$pathExpression = new PathExpression( |
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PathExpression::TYPE_STATE_FIELD | PathExpression::TYPE_SINGLE_VALUED_ASSOCIATION, $rootAlias, |
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$identifierFieldName |
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); |
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$pathExpression->type = $pathType; |
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$distinct = $this->_getQuery()->getHint(self::HINT_DISTINCT); |
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$AST->selectClause->selectExpressions = array( |
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new SelectExpression( |
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new AggregateExpression('count', $pathExpression, $distinct), null |
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) |
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); |
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// ORDER BY is not needed, only increases query execution through unnecessary sorting. |
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$AST->orderByClause = null; |
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} |
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} |
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EC-CUBE /
ec-cube
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