<?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;
use ProxyManager\Proxy\LazyLoadingInterface;
/**
* Creates proxy classes.
*
* Wraps Ocramius/ProxyManager LazyLoadingValueHolderFactory.
*
* @see \ProxyManager\Factory\LazyLoadingValueHolderFactory
*
* @since 5.0
* @author Matthieu Napoli <[email protected]>
*/
class ProxyFactory
{
/**
* If true, write the proxies to disk to improve performances.
* @var bool
*/
private $writeProxiesToFile;
/**
* Directory where to write the proxies (if $writeProxiesToFile is enabled).
* @var string|null
*/
private $proxyDirectory;
/**
* @var LazyLoadingValueHolderFactory|null
*/
private $proxyManager;
public function __construct(bool $writeProxiesToFile = false, string $proxyDirectory = null)
{
$this->writeProxiesToFile = $writeProxiesToFile;
$this->proxyDirectory = $proxyDirectory;
}
/**
* Creates a new lazy proxy instance of the given class with
* the given initializer.
*
* @param string $className name of the class to be proxied
* @param \Closure $initializer initializer to be passed to the proxy
*/
public function createProxy(string $className, \Closure $initializer) : LazyLoadingInterface
{
$this->createProxyManager();
return $this->proxyManager->createProxy($className, $initializer);
}
/**
* Generates and writes the proxy class to file.
*
* @param string $className name of the class to be proxied
*/
public function generateProxyClass(string $className)
{
// If proxy classes a written to file then we pre-generate the class
// If they are not written to file then there is no point to do this
if ($this->writeProxiesToFile) {
$this->createProxyManager();
$this->createProxy($className, function () {});
}
}
private function createProxyManager()
{
if ($this->proxyManager !== null) {
return;
}
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->writeProxiesToFile) {
$config->setProxiesTargetDir($this->proxyDirectory);
$config->setGeneratorStrategy(new FileWriterGeneratorStrategy(new FileLocator($this->proxyDirectory)));
spl_autoload_register($config->getProxyAutoloader());
} else {
$config->setGeneratorStrategy(new EvaluatingGeneratorStrategy());
}
$this->proxyManager = new LazyLoadingValueHolderFactory($config);
}
}