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<?php |
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/* |
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* This file is part of the Pomm's Foundation package. |
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* |
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* (c) 2014 - 2017 Grégoire HUBERT <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace PommProject\Foundation\Session; |
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use PommProject\Foundation\Converter; |
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use PommProject\Foundation\ParameterHolder; |
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use PommProject\Foundation\Client\ClientHolder; |
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use PommProject\Foundation\Converter\ConverterHolder; |
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/** |
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* SessionBuilder |
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* |
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* Session factory. |
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* This class is responsible of creating and configuring a session. It is a |
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* default configuration for session and is dedicated to be overloaded. |
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* |
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* @package Foundation |
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* @copyright 2014 - 2017 Grégoire HUBERT |
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* @author Grégoire HUBERT |
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* @license X11 {@link http://opensource.org/licenses/mit-license.php} |
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*/ |
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class SessionBuilder |
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{ |
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protected $configuration; |
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protected $converter_holder; |
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/** |
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* __construct |
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* |
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* Instantiate builder. |
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* |
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* Mandatory configuration options are: |
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* dsn: connection parameters |
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* name: database logical name |
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* |
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* @param array $configuration |
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* @param ConverterHolder $converter_holder |
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*/ |
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public function __construct(array $configuration, ConverterHolder $converter_holder = null) |
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{ |
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$this->configuration = new ParameterHolder( |
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array_merge( |
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$this->getDefaultConfiguration(), |
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$configuration |
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) |
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); |
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$converter_holder = $converter_holder === null |
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? new ConverterHolder |
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: $converter_holder |
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; |
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$this->initializeConverterHolder($converter_holder); |
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$this->converter_holder = $converter_holder; |
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} |
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/** |
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* addParameter |
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* |
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* Add a configuration parameter. |
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* |
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* @param string $name |
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* @param mixed $value |
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* @return SessionBuilder $this |
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*/ |
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public function addParameter($name, $value) |
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{ |
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$this->configuration->setParameter($name, $value); |
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return $this; |
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} |
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/** |
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* getConverterHolder |
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* |
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* Return the converter holder. |
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* |
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* @return ConverterHolder |
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*/ |
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public function getConverterHolder() |
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{ |
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return $this->converter_holder; |
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} |
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/** |
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* buildSession |
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* |
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* Build a new session. |
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* |
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* @final |
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* @param string $stamp |
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* @return Session |
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*/ |
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final public function buildSession($stamp = null) |
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{ |
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$this->preConfigure(); |
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$dsn = $this |
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->configuration->mustHave('dsn')->getParameter('dsn'); |
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$connection_configuration = |
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$this->configuration |
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->mustHave('connection:configuration') |
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->getParameter('connection:configuration') |
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; |
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$persist = |
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$this->configuration |
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->mustHave('connection:persist') |
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->getParameter('connection:persist') |
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; |
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$session = $this->createSession( |
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$this->createConnection($dsn, $persist, $connection_configuration), |
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$this->createClientHolder(), |
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$stamp |
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); |
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$this->postConfigure($session); |
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return $session; |
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} |
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/** |
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* getDefaultConfiguration |
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* |
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* This must return the default configuration for new sessions. Default |
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* parameters are overrided by the configuration passed as parameter to |
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* this builder. |
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* |
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* @return array |
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*/ |
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protected function getDefaultConfiguration() |
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{ |
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return |
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[ |
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"connection:configuration" => |
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[ |
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'bytea_output' => 'hex', |
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'intervalstyle' => 'ISO_8601', |
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'datestyle' => 'ISO', |
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'standard_conforming_strings' => 'true', |
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'timezone' => date_default_timezone_get(), |
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], |
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'connection:persist' => false, |
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]; |
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} |
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/** |
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* preConfigure |
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* |
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* If any computation to the configuration must be done before each session |
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* creation, it goes here. |
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* |
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* @return SessionBuilder $this |
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*/ |
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protected function preConfigure() |
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{ |
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return $this; |
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} |
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/** |
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* createConnection |
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* |
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* Connection instantiation. |
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* |
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* @param string $dsn |
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* @param bool $persist |
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* @param string|array $connection_configuration |
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* @return Connection |
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*/ |
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protected function createConnection($dsn, $persist, $connection_configuration) |
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{ |
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return new Connection($dsn, $persist, $connection_configuration); |
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} |
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/** |
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* createSession |
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* |
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* Session instantiation. |
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* |
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* @param Connection $connection |
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* @param ClientHolder $client_holder |
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* @param string|null $stamp |
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* @return Session |
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*/ |
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protected function createSession(Connection $connection, ClientHolder $client_holder, $stamp) |
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{ |
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$session_class = $this->configuration->getParameter('class:session', '\PommProject\Foundation\Session\Session'); |
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return new $session_class($connection, $client_holder, $stamp); |
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} |
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/** |
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* createClientHolder |
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* |
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* Instantiate ClientHolder. |
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* |
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* @return ClientHolder |
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*/ |
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protected function createClientHolder() |
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{ |
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return new ClientHolder(); |
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} |
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/** |
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* postConfigure |
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* |
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* Session configuration once created. |
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* All pooler registration stuff goes here. |
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* |
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* @param Session $session |
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* @return SessionBuilder $this |
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*/ |
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protected function postConfigure(Session $session) |
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{ |
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return $this; |
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} |
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/** |
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* initializeConverterHolder |
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* |
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* Converter initialization at startup. |
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* If new converters are to be registered, it goes here. |
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* |
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* @param ConverterHolder $converter_holder |
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* @return SessionBuilder $this |
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*/ |
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protected function initializeConverterHolder(ConverterHolder $converter_holder) |
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{ |
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return $this; |
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} |
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} |
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If a method or function can return multiple different values and unless you are sure that you only can receive a single value in this context, we recommend to add an additional type check:
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