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<?php
declare(strict_types=1);
namespace DI\Proxy;
use ProxyManager\Configuration;
use ProxyManager\Factory\LazyLoadingValueHolderFactory;
use ProxyManager\FileLocator\FileLocator;
use ProxyManager\GeneratorStrategy\EvaluatingGeneratorStrategy;
use ProxyManager\GeneratorStrategy\FileWriterGeneratorStrategy;
/**
* Creates proxy classes.
*
* Wraps Ocramius/ProxyManager LazyLoadingValueHolderFactory.
*
* @see LazyLoadingValueHolderFactory
*
* @since 5.0
* @author Matthieu Napoli <matthieu@mnapoli.fr>
*/
class ProxyFactory implements ProxyFactoryInterface
{
private ?LazyLoadingValueHolderFactory $proxyManager = null;
/**
* @param string|null $proxyDirectory If set, write the proxies to disk in this directory to improve performances.
*/
public function __construct(
private ?string $proxyDirectory = null,
) {
}
/**
* Creates a new lazy proxy instance of the given class with
* the given initializer.
*
* {@inheritDoc}
*/
public function createProxy(string $className, \Closure $createFunction): object
{
return $this->proxyManager()->createProxy(
$className,
function (& $wrappedObject, $proxy, $method, $params, & $initializer) use ($createFunction) {
$wrappedObject = $createFunction();
$initializer = null; // turning off further lazy initialization
return true;
}
);
}
/**
* Generates and writes the proxy class to file.
*
* @param class-string $className name of the class to be proxied
*/
public function generateProxyClass(string $className) : void
{
// If proxy classes a written to file then we pre-generate the class
// If they are not written to file then there is no point to do this
if ($this->proxyDirectory) {
$this->createProxy($className, function () {});
}
}
private function proxyManager() : LazyLoadingValueHolderFactory
{
if ($this->proxyManager === null) {
if (! class_exists(Configuration::class)) {
throw new \RuntimeException('The ocramius/proxy-manager library is not installed. Lazy injection requires that library to be installed with Composer in order to work. Run "composer require ocramius/proxy-manager:~2.0".');
}
$config = new Configuration();
if ($this->proxyDirectory) {
$config->setProxiesTargetDir($this->proxyDirectory);
$config->setGeneratorStrategy(new FileWriterGeneratorStrategy(new FileLocator($this->proxyDirectory)));
// @phpstan-ignore-next-line
spl_autoload_register($config->getProxyAutoloader());
} else {
$config->setGeneratorStrategy(new EvaluatingGeneratorStrategy());
}
$this->proxyManager = new LazyLoadingValueHolderFactory($config);
}
return $this->proxyManager;
}
}