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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Stdlib\Hydrator\Strategy;
class ClosureStrategy implements StrategyInterface
{
/**
* Function, used in extract method, default:
* function ($value) {
* return $value;
* };
* @var callable
*/
protected $extractFunc = null;
/**
* Function, used in hydrate method, default:
* function ($value) {
* return $value;
* };
* @var callable
*/
protected $hydrateFunc = null;
/**
* You can describe how your values will extract and hydrate, like this:
* $hydrator->addStrategy('category', new ClosureStrategy(
* function (Category $value) {
* return (int) $value->id;
* },
* function ($value) {
* return new Category((int) $value);
* }
* ));
*
* @param callable $extractFunc - anonymous function, that extract values
* from object
* @param callable $hydrateFunc - anonymous function, that hydrate values
* into object
*/
public function __construct($extractFunc = null, $hydrateFunc = null)
{
if (isset($extractFunc)) {
if (!is_callable($extractFunc)) {
throw new \Exception('$extractFunc must be callable');
}
$this->extractFunc = $extractFunc;
} else {
$this->extractFunc = function ($value) {
return $value;
};
}
if (isset($hydrateFunc)) {
if (!is_callable($hydrateFunc)) {
throw new \Exception('$hydrateFunc must be callable');
}
$this->hydrateFunc = $hydrateFunc;
} else {
$this->hydrateFunc = function ($value) {
return $value;
};
}
}
/**
* Converts the given value so that it can be extracted by the hydrator.
*
* @param mixed $value The original value.
* @param array $object The object is optionally provided as context.
* @return mixed Returns the value that should be extracted.
*/
public function extract($value, $object = null)
{
$func = $this->extractFunc;
return $func($value, $object);
}
/**
* Converts the given value so that it can be hydrated by the hydrator.
*
* @param mixed $value The original value.
* @param array $data The whole data is optionally provided as context.
* @return mixed Returns the value that should be hydrated.
*/
public function hydrate($value, $data = null)
{
$func = $this->hydrateFunc;
return $func($value, $data);
}
}