571 lines
25 KiB
PHP
571 lines
25 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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#namespace Doctrine::ORM::Internal;
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/**
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* The hydrator has the tedious to process result sets returned by the database
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* and turn them into useable structures.
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*
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* Runtime complexity: The following gives the overall number of iterations
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* required to process a result set when using identity hydration
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* (HYDRATE_IDENTITY_OBJECT or HYDRATE_IDENTITY_ARRAY).
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*
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* <code>numRowsInResult * numColumnsInResult + numRowsInResult * numClassesInQuery</code>
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*
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* This comes down to:
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*
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* <code>(numRowsInResult * (numColumnsInResult + numClassesInQuery))</code>
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*
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* For scalar hydration (HYDRATE_SCALAR) it's:
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*
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* <code>numRowsInResult * numColumnsInResult</code>
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*
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* Note that this is only a crude definition as it also heavily
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* depends on the complexity of all the single operations that are performed in
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* each iteration.
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*
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* As can be seen, the number of columns in the result has the most impact on
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* the overall performance (apart from the row count, of course), since numClassesInQuery
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* is usually pretty low.
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* That's why the performance of the _gatherRowData() methods which are responsible
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* for the "numRowsInResult * numColumnsInResult" part is crucial to fast hydration.
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*
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @link www.phpdoctrine.org
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* @since 1.0
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* @version $Revision: 3192 $
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* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
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* @author Roman Borschel <roman@code-factory.org>
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*/
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class Doctrine_HydratorNew extends Doctrine_Hydrator_Abstract
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{
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/**
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* Parses the data returned by statement object.
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*
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* This is method defines the core of Doctrine's object population algorithm.
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*
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* @todo: Detailed documentation. Refactor (too long & nesting level).
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*
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* @param mixed $stmt
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* @param array $tableAliases Array that maps table aliases (SQL alias => DQL alias)
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* @param array $aliasMap Array that maps DQL aliases to their components
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* (DQL alias => array(
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* 'metadata' => Table object,
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* 'parent' => Parent DQL alias (if any),
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* 'relation' => Relation object (if any),
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* 'map' => Custom index to use as the key in the result (if any),
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* 'agg' => List of aggregate value names (sql alias => dql alias)
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* )
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* )
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* @return mixed The created object/array graph.
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* @throws Doctrine_Hydrator_Exception If the hydration process failed.
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*/
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public function hydrateResultSet($parserResult)
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{
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if ($parserResult->getHydrationMode() === null) {
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$hydrationMode = $this->_hydrationMode;
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} else {
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$hydrationMode = $parserResult->getHydrationMode();
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}
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$stmt = $parserResult->getDatabaseStatement();
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if ($hydrationMode == Doctrine::HYDRATE_NONE) {
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return $stmt->fetchAll(PDO::FETCH_NUM);
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}
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$this->_tableAliases = $parserResult->getTableToClassAliasMap();
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$this->_queryComponents = $parserResult->getQueryComponents();
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if ($hydrationMode == Doctrine::HYDRATE_ARRAY) {
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$driver = new Doctrine_Hydrator_ArrayDriver();
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} else {
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$driver = new Doctrine_Hydrator_RecordDriver($this->_em);
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}
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$s = microtime(true);
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// Used variables during hydration
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reset($this->_queryComponents);
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$rootAlias = key($this->_queryComponents);
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$rootEntityName = $this->_queryComponents[$rootAlias]['metadata']->getClassName();
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// if only one class is involved we can make our lives easier
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$isSimpleQuery = count($this->_queryComponents) <= 1;
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// Lookup map to quickly discover/lookup existing records in the result
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// It's the identifier "memory"
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$identifierMap = array();
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// Holds for each class a pointer to the last previously seen element in the result set
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$resultPointers = array();
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// holds the values of the identifier/primary key fields of components,
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// separated by a pipe '|' and grouped by component alias (r, u, i, ... whatever)
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// the $idTemplate is a prepared template. $id is set to a fresh template when
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// starting to process a row.
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$id = array();
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$idTemplate = array();
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// Holds the resulting hydrated data structure
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if ($parserResult->isMixedQuery() || $hydrationMode == Doctrine::HYDRATE_SCALAR) {
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$result = array();
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} else {
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$result = $driver->getElementCollection($rootEntityName);
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}
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if ($stmt === false || $stmt === 0) {
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return $result;
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}
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// Initialize
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foreach ($this->_queryComponents as $dqlAlias => $component) {
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// disable lazy-loading of related elements during hydration
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$component['metadata']->setAttribute('loadReferences', false);
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$entityName = $component['metadata']->getClassName();
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$identifierMap[$dqlAlias] = array();
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$resultPointers[$dqlAlias] = array();
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$idTemplate[$dqlAlias] = '';
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}
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$cache = array();
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// Evaluate HYDRATE_SINGLE_SCALAR
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if ($hydrationMode == Doctrine::HYDRATE_SINGLE_SCALAR) {
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$result = $stmt->fetchAll(PDO::FETCH_ASSOC);
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if (count($result) > 1 || count($result[0]) > 1) {
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throw Doctrine_Hydrator_Exception::nonUniqueResult();
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}
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return array_shift($this->_gatherScalarRowData($result[0], $cache));
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}
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// Process result set
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while ($data = $stmt->fetch(Doctrine::FETCH_ASSOC)) {
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// Evaluate HYDRATE_SCALAR
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if ($hydrationMode == Doctrine::HYDRATE_SCALAR) {
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$result[] = $this->_gatherScalarRowData($data, $cache);
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continue;
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}
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// From here on its all about graph construction
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// 1) Initialize
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$id = $idTemplate; // initialize the id-memory
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$nonemptyComponents = array();
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$rowData = $this->_gatherRowData($data, $cache, $id, $nonemptyComponents);
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// 2) Hydrate the data of the root entity from the current row
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// Check for an existing element
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$index = false;
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if ($isSimpleQuery || ! isset($identifierMap[$rootAlias][$id[$rootAlias]])) {
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$element = $driver->getElement($rowData[$rootAlias], $rootEntityName);
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if ($field = $this->_getCustomIndexField($rootAlias)) {
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if ($parserResult->isMixedQuery()) {
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$result[] = array(
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$driver->getFieldValue($element, $field) => $element
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);
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} else {
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$driver->addElementToIndexedCollection($result, $element, $field);
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}
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} else {
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if ($parserResult->isMixedQuery()) {
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$result[] = array($element);
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} else {
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$driver->addElementToCollection($result, $element);
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}
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}
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$identifierMap[$rootAlias][$id[$rootAlias]] = $driver->getLastKey($result);
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} else {
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$index = $identifierMap[$rootAlias][$id[$rootAlias]];
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}
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$this->_updateResultPointer($resultPointers, $result, $index, $rootAlias, false);
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unset($rowData[$rootAlias]);
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// end hydrate data of the root component for the current row
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// Extract scalar values. They're appended at the end.
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if (isset($rowData['scalars'])) {
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$scalars = $rowData['scalars'];
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unset($rowData['scalars']);
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}
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// 3) Now hydrate the rest of the data found in the current row, that
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// belongs to other (related) entities.
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foreach ($rowData as $dqlAlias => $data) {
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$index = false;
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$map = $this->_queryComponents[$dqlAlias];
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$entityName = $map['metadata']->getClassName();
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$parent = $map['parent'];
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$relation = $map['relation'];
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$relationAlias = $relation->getSourceFieldName();//$relation->getAlias();
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$path = $parent . '.' . $dqlAlias;
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// pick the right element that will get the associated element attached
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if ($parserResult->isMixedQuery() && $parent == $rootAlias) {
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$key = key(reset($resultPointers));
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// TODO: Exception if $key === null ?
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$baseElement =& $resultPointers[$parent][$key];
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} else if (isset($resultPointers[$parent])) {
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$baseElement =& $resultPointers[$parent];
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} else {
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unset($resultPointers[$dqlAlias]); // Ticket #1228
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continue;
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}
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// check the type of the relation (many or single-valued)
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if ( ! $relation->isOneToOne()) {
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// x-many relation
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$oneToOne = false;
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if (isset($nonemptyComponents[$dqlAlias])) {
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$driver->initRelatedCollection($baseElement, $relationAlias);
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$indexExists = isset($identifierMap[$path][$id[$parent]][$id[$dqlAlias]]);
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$index = $indexExists ? $identifierMap[$path][$id[$parent]][$id[$dqlAlias]] : false;
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$indexIsValid = $index !== false ? isset($baseElement[$relationAlias][$index]) : false;
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if ( ! $indexExists || ! $indexIsValid) {
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$element = $driver->getElement($data, $entityName);
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if ($field = $this->_getCustomIndexField($dqlAlias)) {
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$driver->addRelatedIndexedElement($baseElement, $relationAlias, $element, $field);
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} else {
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$driver->addRelatedElement($baseElement, $relationAlias, $element);
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}
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$identifierMap[$path][$id[$parent]][$id[$dqlAlias]] = $driver->getLastKey(
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$driver->getReferenceValue($baseElement, $relationAlias));
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}
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} else if ( ! isset($baseElement[$relationAlias])) {
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$driver->setRelatedElement($baseElement, $relationAlias,
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$driver->getElementCollection($entityName));
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}
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} else {
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// x-1 relation
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$oneToOne = true;
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if ( ! isset($nonemptyComponents[$dqlAlias]) &&
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! $driver->isFieldSet($baseElement, $relationAlias)) {
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$driver->setRelatedElement($baseElement, $relationAlias,
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$driver->getNullPointer());
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} else if ( ! $driver->isFieldSet($baseElement, $relationAlias)) {
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$driver->setRelatedElement($baseElement, $relationAlias,
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$driver->getElement($data, $entityName));
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}
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}
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if (($coll =& $driver->getReferenceValue($baseElement, $relationAlias)) !== null) {
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$this->_updateResultPointer($resultPointers, $coll, $index, $dqlAlias, $oneToOne);
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}
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}
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// append scalar values to mixed result sets
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if (isset($scalars)) {
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$rowNumber = count($result) - 1;
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foreach ($scalars as $name => $value) {
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$result[$rowNumber][$name] = $value;
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}
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}
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}
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$stmt->closeCursor();
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$driver->flush();
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// re-enable lazy loading
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foreach ($this->_queryComponents as $dqlAlias => $data) {
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$data['metadata']->setAttribute('loadReferences', true);
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}
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$e = microtime(true);
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echo 'Hydration took: ' . ($e - $s) . ' for '.count($result).' records' . PHP_EOL;
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return $result;
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}
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/**
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* Updates the result pointer for an Entity. The result pointers point to the
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* last seen instance of each Entity type. This is used for graph construction.
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*
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* @param array $resultPointers The result pointers.
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* @param array|Collection $coll The element.
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* @param boolean|integer $index Index of the element in the collection.
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* @param string $dqlAlias
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* @param boolean $oneToOne Whether it is a single-valued association or not.
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*/
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protected function _updateResultPointer(&$resultPointers, &$coll, $index, $dqlAlias, $oneToOne)
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{
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if ($coll === $this->_nullObject || $coll === null) {
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unset($resultPointers[$dqlAlias]); // Ticket #1228
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return;
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}
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if ($index !== false) {
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$resultPointers[$dqlAlias] =& $coll[$index];
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return;
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}
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if (is_array($coll) && $coll) {
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if ($oneToOne) {
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$resultPointers[$dqlAlias] =& $coll;
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} else {
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end($coll);
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$resultPointers[$dqlAlias] =& $coll[key($coll)];
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}
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} else if ($coll instanceof Doctrine_Entity) {
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$resultPointers[$dqlAlias] = $coll;
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} else if (count($coll) > 0) {
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$resultPointers[$dqlAlias] = $coll->getLast();
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}
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}
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/**
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* Processes a row of the result set.
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* Used for identity hydration (HYDRATE_IDENTITY_OBJECT and HYDRATE_IDENTITY_ARRAY).
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* Puts the elements of a result row into a new array, grouped by the class
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* they belong to. The column names in the result set are mapped to their
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* field names during this procedure as well as any necessary conversions on
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* the values applied.
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*
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* @return array An array with all the fields (name => value) of the data row,
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* grouped by their component (alias).
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* @todo Significant code duplication with _gatherScalarRowData(). Good refactoring
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* possible without sacrificing performance?
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*/
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protected function _gatherRowData(&$data, &$cache, &$id, &$nonemptyComponents)
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{
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$rowData = array();
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foreach ($data as $key => $value) {
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// Parse each column name only once. Cache the results.
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if ( ! isset($cache[$key])) {
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if ($this->_isIgnoredName($key)) continue;
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// Cache general information like the column name <-> field name mapping
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$e = explode(Doctrine_Query_Production::SQLALIAS_SEPARATOR, $key);
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$columnName = array_pop($e);
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$cache[$key]['dqlAlias'] = $this->_tableAliases[
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implode(Doctrine_Query_Production::SQLALIAS_SEPARATOR, $e)
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];
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$classMetadata = $this->_queryComponents[$cache[$key]['dqlAlias']]['metadata'];
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// check whether it's an aggregate value or a regular field
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if (isset($this->_queryComponents[$cache[$key]['dqlAlias']]['agg'][$columnName])) {
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$fieldName = $this->_queryComponents[$cache[$key]['dqlAlias']]['agg'][$columnName];
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$cache[$key]['isScalar'] = true;
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} else {
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$fieldName = $classMetadata->lookupFieldName($columnName);
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$cache[$key]['isScalar'] = false;
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}
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$cache[$key]['fieldName'] = $fieldName;
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// cache identifier information
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if ($classMetadata->isIdentifier($fieldName)) {
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$cache[$key]['isIdentifier'] = true;
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} else {
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$cache[$key]['isIdentifier'] = false;
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}
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// cache type information
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$type = $classMetadata->getTypeOfColumn($columnName);
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if ($type == 'integer' || $type == 'string') {
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$cache[$key]['isSimpleType'] = true;
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} else {
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$cache[$key]['type'] = $type;
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$cache[$key]['isSimpleType'] = false;
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}
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}
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$class = $this->_queryComponents[$cache[$key]['dqlAlias']]['metadata'];
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$dqlAlias = $cache[$key]['dqlAlias'];
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$fieldName = $cache[$key]['fieldName'];
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if ($cache[$key]['isScalar']) {
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$rowData['scalars'][$fieldName] = $value;
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continue;
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}
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if ($cache[$key]['isIdentifier']) {
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$id[$dqlAlias] .= '|' . $value;
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}
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if ($cache[$key]['isSimpleType']) {
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$rowData[$dqlAlias][$fieldName] = $value;
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} else {
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$rowData[$dqlAlias][$fieldName] = $this->prepareValue(
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$class, $fieldName, $value, $cache[$key]['type']);
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}
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if ( ! isset($nonemptyComponents[$dqlAlias]) && $value !== null) {
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$nonemptyComponents[$dqlAlias] = true;
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}
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}
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return $rowData;
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}
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/**
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* Processes a row of the result set.
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* Used for HYDRATE_SCALAR. This is a variant of _gatherRowData() that
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* simply converts column names to field names and properly prepares the
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* values. The resulting row has the same number of elements as before.
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*
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* @param array $data
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* @param array $cache
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* @return array The processed row.
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* @todo Significant code duplication with _gatherRowData(). Good refactoring
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* possible without sacrificing performance?
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*/
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private function _gatherScalarRowData(&$data, &$cache)
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{
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$rowData = array();
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foreach ($data as $key => $value) {
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// Parse each column name only once. Cache the results.
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if ( ! isset($cache[$key])) {
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if ($this->_isIgnoredName($key)) continue;
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// cache general information like the column name <-> field name mapping
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$e = explode(Doctrine_Query_Production::SQLALIAS_SEPARATOR, $key);
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$columnName = array_pop($e);
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$cache[$key]['dqlAlias'] = $this->_tableAliases[
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implode(Doctrine_Query_Production::SQLALIAS_SEPARATOR, $e)
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];
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$classMetadata = $this->_queryComponents[$cache[$key]['dqlAlias']]['metadata'];
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// check whether it's an aggregate value or a regular field
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if (isset($this->_queryComponents[$cache[$key]['dqlAlias']]['agg'][$columnName])) {
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$fieldName = $this->_queryComponents[$cache[$key]['dqlAlias']]['agg'][$columnName];
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$cache[$key]['isScalar'] = true;
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} else {
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$fieldName = $classMetadata->lookupFieldName($columnName);
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$cache[$key]['isScalar'] = false;
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}
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$cache[$key]['fieldName'] = $fieldName;
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// cache type information
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$type = $classMetadata->getTypeOfColumn($columnName);
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if ($type == 'integer' || $type == 'string') {
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$cache[$key]['isSimpleType'] = true;
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} else {
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$cache[$key]['type'] = $type;
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$cache[$key]['isSimpleType'] = false;
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}
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}
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$class = $this->_queryComponents[$cache[$key]['dqlAlias']]['metadata'];
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$dqlAlias = $cache[$key]['dqlAlias'];
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$fieldName = $cache[$key]['fieldName'];
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if ($cache[$key]['isSimpleType'] || $cache[$key]['isScalar']) {
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$rowData[$dqlAlias . '_' . $fieldName] = $value;
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} else {
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$rowData[$dqlAlias . '_' . $fieldName] = $this->prepareValue(
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$class, $fieldName, $value, $cache[$key]['type']);
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}
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}
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return $rowData;
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}
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/**
|
|
* Gets the custom field used for indexing for the specified component alias.
|
|
*
|
|
* @return string The field name of the field used for indexing or NULL
|
|
* if the component does not use any custom field indices.
|
|
*/
|
|
private function _getCustomIndexField($alias)
|
|
{
|
|
return isset($this->_queryComponents[$alias]['map']) ? $this->_queryComponents[$alias]['map'] : null;
|
|
}
|
|
|
|
/**
|
|
* Checks whether a name is ignored. Used during result set parsing to skip
|
|
* certain elements in the result set that do not have any meaning for the result.
|
|
* (I.e. ORACLE limit/offset emulation adds doctrine_rownum to the result set).
|
|
*
|
|
* @param string $name
|
|
* @return boolean
|
|
*/
|
|
private function _isIgnoredName($name)
|
|
{
|
|
return $name == 'doctrine_rownum';
|
|
}
|
|
|
|
/**
|
|
* prepareValue
|
|
* this method performs special data preparation depending on
|
|
* the type of the given column
|
|
*
|
|
* 1. It unserializes array and object typed columns
|
|
* 2. Uncompresses gzip typed columns
|
|
* 3. Gets the appropriate enum values for enum typed columns
|
|
* 4. Initializes special null object pointer for null values (for fast column existence checking purposes)
|
|
*
|
|
* example:
|
|
* <code type='php'>
|
|
* $field = 'name';
|
|
* $value = null;
|
|
* $table->prepareValue($field, $value); // Doctrine_Null
|
|
* </code>
|
|
*
|
|
* @param string $field the name of the field
|
|
* @param string $value field value
|
|
* @param string $typeHint A hint on the type of the value. If provided, the type lookup
|
|
* for the field can be skipped. Used i.e. during hydration to
|
|
* improve performance on large and/or complex results.
|
|
* @return mixed prepared value
|
|
*/
|
|
public function prepareValue(Doctrine_ClassMetadata $class, $fieldName, $value, $typeHint = null)
|
|
{
|
|
if ($value === $this->_nullObject) {
|
|
return $this->_nullObject;
|
|
} else if ($value === null) {
|
|
return null;
|
|
} else {
|
|
$type = is_null($typeHint) ? $class->getTypeOf($fieldName) : $typeHint;
|
|
switch ($type) {
|
|
case 'integer':
|
|
case 'string':
|
|
case 'enum':
|
|
case 'boolean':
|
|
// don't do any conversions on primitive types
|
|
break;
|
|
case 'array':
|
|
case 'object':
|
|
if (is_string($value)) {
|
|
$value = unserialize($value);
|
|
if ($value === false) {
|
|
throw new Doctrine_Hydrator_Exception('Unserialization of ' . $fieldName . ' failed.');
|
|
}
|
|
return $value;
|
|
}
|
|
break;
|
|
case 'gzip':
|
|
$value = gzuncompress($value);
|
|
if ($value === false) {
|
|
throw new Doctrine_Hydrator_Exception('Uncompressing of ' . $fieldName . ' failed.');
|
|
}
|
|
return $value;
|
|
break;
|
|
}
|
|
}
|
|
return $value;
|
|
}
|
|
|
|
|
|
|
|
/** Needed only temporarily until the new parser is ready */
|
|
private $_isResultMixed = false;
|
|
public function setResultMixed($bool)
|
|
{
|
|
$this->_isResultMixed = $bool;
|
|
}
|
|
|
|
}
|