441 lines
13 KiB
PHP
441 lines
13 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.doctrine-project.org>.
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*/
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namespace Doctrine\ORM;
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use Doctrine\ORM\Query\Parser,
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Doctrine\ORM\Query\QueryException;
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/**
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* A Query object represents a DQL query.
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*
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @link www.doctrine-project.org
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* @since 1.0
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* @version $Revision: 3938 $
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* @author Guilherme Blanco <guilhermeblanco@hotmail.com>
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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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final class Query extends AbstractQuery
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{
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/* Query STATES */
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/**
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* A query object is in CLEAN state when it has NO unparsed/unprocessed DQL parts.
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*/
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const STATE_CLEAN = 1;
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/**
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* A query object is in state DIRTY when it has DQL parts that have not yet been
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* parsed/processed. This is automatically defined as DIRTY when addDqlQueryPart
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* is called.
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*/
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const STATE_DIRTY = 2;
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/* Query HINTS */
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/**
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* The refresh hint turns any query into a refresh query with the result that
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* any local changes in entities are overridden with the fetched values.
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*
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* @var string
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*/
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const HINT_REFRESH = 'doctrine.refresh';
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/**
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* The forcePartialLoad query hint forces a particular query to return
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* partial objects.
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*
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* @var string
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*/
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const HINT_FORCE_PARTIAL_LOAD = 'doctrine.forcePartialLoad';
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/**
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* The includeMetaColumns query hint causes meta columns like foreign keys and
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* discriminator columns to be selected and returned as part of the query result.
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*
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* This hint does only apply to non-object queries.
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*
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* @var string
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*/
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const HINT_INCLUDE_META_COLUMNS = 'doctrine.includeMetaColumns';
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const HINT_CUSTOM_TREE_WALKERS = 'doctrine.customTreeWalkers';
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//const HINT_READ_ONLY = 'doctrine.readOnly';
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/**
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* @var string
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*/
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const HINT_INTERNAL_ITERATION = 'doctrine.internal.iteration';
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/**
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* @var integer $_state The current state of this query.
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*/
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private $_state = self::STATE_CLEAN;
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/**
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* @var string $_dql Cached DQL query.
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*/
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private $_dql = null;
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/**
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* @var Doctrine\ORM\Query\ParserResult The parser result that holds DQL => SQL information.
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*/
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private $_parserResult;
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/**
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* @var integer The first result to return (the "offset").
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*/
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private $_firstResult = null;
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/**
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* @var integer The maximum number of results to return (the "limit").
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*/
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private $_maxResults = null;
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/**
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* @var CacheDriver The cache driver used for caching queries.
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*/
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private $_queryCache;
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/**
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* @var boolean Boolean value that indicates whether or not expire the query cache.
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*/
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private $_expireQueryCache = false;
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/**
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* @var int Query Cache lifetime.
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*/
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private $_queryCacheTTL;
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// End of Caching Stuff
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/**
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* Initializes a new Query instance.
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*
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* @param Doctrine\ORM\EntityManager $entityManager
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*/
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public function __construct(EntityManager $entityManager)
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{
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parent::__construct($entityManager);
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}
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/**
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* Gets the SQL query/queries that correspond to this DQL query.
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*
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* @return mixed The built sql query or an array of all sql queries.
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* @override
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*/
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public function getSql()
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{
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return $this->_parse()->getSqlExecutor()->getSqlStatements();
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}
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/**
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* Parses the DQL query, if necessary, and stores the parser result.
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*
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* Note: Populates $this->_parserResult as a side-effect.
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*
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* @return Doctrine\ORM\Query\ParserResult
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*/
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private function _parse()
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{
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if ($this->_state === self::STATE_DIRTY) {
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$parser = new Parser($this);
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$this->_parserResult = $parser->parse();
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$this->_state = self::STATE_CLEAN;
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}
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return $this->_parserResult;
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}
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/**
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* {@inheritdoc}
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*
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* @param array $params
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* @return Statement The resulting Statement.
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* @override
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*/
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protected function _doExecute(array $params)
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{
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// Check query cache
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if ($queryCache = $this->getQueryCacheDriver()) {
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// Calculate hash for dql query.
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// TODO: Probably need to include query hints in hash calculation, because query hints
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// can have influence on the SQL.
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// TODO: Include _maxResults and _firstResult in hash calculation
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$hash = md5($this->getDql() . 'DOCTRINE_QUERY_CACHE_SALT');
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$cached = ($this->_expireQueryCache) ? false : $queryCache->fetch($hash);
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if ($cached === false) {
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// Cache miss.
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$executor = $this->_parse()->getSqlExecutor();
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$queryCache->save($hash, $this->_parserResult, null);
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} else {
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// Cache hit.
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$this->_parserResult = $cached;
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$executor = $this->_parserResult->getSqlExecutor();
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}
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} else {
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$executor = $this->_parse()->getSqlExecutor();
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}
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$params = $this->_prepareParams($params);
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if ( ! $this->_resultSetMapping) {
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$this->_resultSetMapping = $this->_parserResult->getResultSetMapping();
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}
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return $executor->execute($this->_em->getConnection(), $params);
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}
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/**
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* {@inheritdoc}
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*
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* @override
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*/
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protected function _prepareParams(array $params)
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{
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$sqlParams = array();
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$paramMappings = $this->_parserResult->getParameterMappings();
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if (count($paramMappings) != count($params)) {
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throw QueryException::invalidParameterNumber();
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}
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foreach ($params as $key => $value) {
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if ( ! isset($paramMappings[$key])) {
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throw QueryException::unknownParameter($key);
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}
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if (is_object($value)) {
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$values = $this->_em->getClassMetadata(get_class($value))->getIdentifierValues($value);
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$sqlPositions = $paramMappings[$key];
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$sqlParams = array_merge($sqlParams, array_combine((array)$sqlPositions, (array)$values));
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} else if (is_bool($value)) {
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$boolValue = $this->_em->getConnection()->getDatabasePlatform()->convertBooleans($value);
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foreach ($paramMappings[$key] as $position) {
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$sqlParams[$position] = $boolValue;
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}
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} else {
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foreach ($paramMappings[$key] as $position) {
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$sqlParams[$position] = $value;
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}
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}
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}
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ksort($sqlParams);
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return array_values($sqlParams);
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}
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/**
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* Defines a cache driver to be used for caching queries.
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*
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* @param Doctrine_Cache_Interface|null $driver Cache driver
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* @return Query This query instance.
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*/
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public function setQueryCacheDriver($queryCache)
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{
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$this->_queryCache = $queryCache;
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return $this;
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}
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/**
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* Returns the cache driver used for query caching.
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*
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* @return CacheDriver The cache driver used for query caching or NULL, if this
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* Query does not use query caching.
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*/
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public function getQueryCacheDriver()
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{
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if ($this->_queryCache) {
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return $this->_queryCache;
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} else {
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return $this->_em->getConfiguration()->getQueryCacheImpl();
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}
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}
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/**
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* Defines how long the query cache will be active before expire.
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*
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* @param integer $timeToLive How long the cache entry is valid
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* @return Query This query instance.
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*/
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public function setQueryCacheLifetime($timeToLive)
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{
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if ($timeToLive !== null) {
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$timeToLive = (int) $timeToLive;
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}
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$this->_queryCacheTTL = $timeToLive;
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return $this;
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}
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/**
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* Retrieves the lifetime of resultset cache.
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*
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* @return int
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*/
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public function getQueryCacheLifetime()
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{
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return $this->_queryCacheTTL;
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}
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/**
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* Defines if the query cache is active or not.
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*
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* @param boolean $expire Whether or not to force query cache expiration.
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* @return Query This query instance.
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*/
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public function expireQueryCache($expire = true)
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{
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$this->_expireQueryCache = $expire;
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return $this;
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}
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/**
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* Retrieves if the query cache is active or not.
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*
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* @return bool
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*/
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public function getExpireQueryCache()
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{
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return $this->_expireQueryCache;
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}
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/**
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* @override
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*/
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public function free()
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{
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parent::free();
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$this->_dql = null;
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$this->_state = self::STATE_CLEAN;
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}
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/**
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* Sets a DQL query string.
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*
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* @param string $dqlQuery DQL Query
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* @return Doctrine\ORM\AbstractQuery
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*/
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public function setDql($dqlQuery)
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{
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if ($dqlQuery !== null) {
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$this->_dql = $dqlQuery;
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$this->_state = self::STATE_DIRTY;
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}
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return $this;
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}
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/**
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* Returns the DQL query that is represented by this query object.
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*
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* @return string DQL query
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*/
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public function getDql()
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{
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return $this->_dql;
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}
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/**
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* Returns the state of this query object
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* By default the type is Doctrine_ORM_Query_Abstract::STATE_CLEAN but if it appears any unprocessed DQL
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* part, it is switched to Doctrine_ORM_Query_Abstract::STATE_DIRTY.
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*
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* @see AbstractQuery::STATE_CLEAN
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* @see AbstractQuery::STATE_DIRTY
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*
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* @return integer Return the query state
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*/
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public function getState()
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{
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return $this->_state;
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}
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/**
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* Method to check if an arbitrary piece of DQL exists
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*
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* @param string $dql Arbitrary piece of DQL to check for
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* @return boolean
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*/
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public function contains($dql)
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{
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return stripos($this->getDql(), $dql) === false ? false : true;
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}
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/**
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* Sets the position of the first result to retrieve (the "offset").
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*
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* @param integer $firstResult The first result to return.
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* @return Query This query object.
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*/
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public function setFirstResult($firstResult)
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{
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$this->_firstResult = $firstResult;
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return $this;
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}
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/**
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* Gets the position of the first result the query object was set to retrieve (the "offset").
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* Returns NULL if {@link setFirstResult} was not applied to this query.
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*
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* @return integer The position of the first result.
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*/
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public function getFirstResult()
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{
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return $this->_firstResult;
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}
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/**
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* Sets the maximum number of results to retrieve (the "limit").
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*
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* @param integer $maxResults
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* @return Query This query object.
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*/
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public function setMaxResults($maxResults)
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{
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$this->_maxResults = $maxResults;
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return $this;
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}
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/**
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* Gets the maximum number of results the query object was set to retrieve (the "limit").
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* Returns NULL if {@link setMaxResults} was not applied to this query.
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*
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* @return integer Maximum number of results.
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*/
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public function getMaxResults()
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{
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return $this->_maxResults;
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}
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/**
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* Executes the query and returns an IterableResult that can be used to incrementally
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* iterated over the result.
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*
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* @param array $params The query parameters.
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* @param integer $hydrationMode The hydration mode to use.
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* @return IterableResult
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*/
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public function iterate(array $params = array(), $hydrationMode = self::HYDRATE_OBJECT)
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{
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$this->setHint(self::HINT_INTERNAL_ITERATION, true);
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return parent::iterate($params, $hydrationMode);
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}
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} |