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<?php
/**
* CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
* Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
*
* Licensed under The MIT License
* For full copyright and license information, please see the LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
* @link https://cakephp.org CakePHP(tm) Project
* @since 3.0.0
* @license https://opensource.org/licenses/mit-license.php MIT License
*/
namespace Cake\Database\Statement;
/**
* Wraps a statement in a callback that allows row results
* to be modified when being fetched.
*
* This is used by CakePHP to eagerly load association data.
*/
class CallbackStatement extends StatementDecorator
{
/**
* A callback function to be applied to results.
*
* @var callable
*/
protected $_callback;
/**
* Constructor
*
* @param \Cake\Database\StatementInterface $statement The statement to decorate.
* @param \Cake\Database\Driver $driver The driver instance used by the statement.
* @param callable $callback The callback to apply to results before they are returned.
*/
public function __construct($statement, $driver, $callback)
{
parent::__construct($statement, $driver);
$this->_callback = $callback;
}
/**
* Fetch a row from the statement.
*
* The result will be processed by the callback when it is not `false`.
*
* @param string $type Either 'num' or 'assoc' to indicate the result format you would like.
* @return array|false
*/
public function fetch($type = parent::FETCH_TYPE_NUM)
{
$callback = $this->_callback;
$row = $this->_statement->fetch($type);
return $row === false ? $row : $callback($row);
}
/**
* Fetch all rows from the statement.
*
* Each row in the result will be processed by the callback when it is not `false.
*
* @param string $type Either 'num' or 'assoc' to indicate the result format you would like.
* @return array
*/
public function fetchAll($type = parent::FETCH_TYPE_NUM)
{
return array_map($this->_callback, $this->_statement->fetchAll($type));
}
}