<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/
namespace Magento\Framework\ObjectManager;

use Magento\Framework\Filesystem\DriverInterface;
use Magento\Framework\ObjectManager\Definition\Runtime;
use Magento\Framework\Code\Generator\Autoloader;

/**
* @SuppressWarnings(PHPMD.CouplingBetweenObjects)
*/
class DefinitionFactory
{
/**
* Class generation dir
*
* @var string
*/
protected $_generationDir;

/**
* Filesystem Driver
*
* @var DriverInterface
*/
protected $_filesystemDriver;

/**
* @var \Magento\Framework\Code\Generator
*/
protected $codeGenerator;

/**
* @param DriverInterface $filesystemDriver
* @param string $generationDir
*/
public function __construct(
DriverInterface $filesystemDriver,
$generationDir
) {
$this->_filesystemDriver = $filesystemDriver;
$this->_generationDir = $generationDir;
}

/**
* Create class definitions
*
* @return DefinitionInterface
*/
public function createClassDefinition()
{
$autoloader = new Autoloader($this->getCodeGenerator());
spl_autoload_register([$autoloader, 'load']);
return new Runtime();
}

/**
* Create plugin definitions
*
* @return \Magento\Framework\Interception\DefinitionInterface
*/
public function createPluginDefinition()
{
return new \Magento\Framework\Interception\Definition\Runtime();
}

/**
* Create relations
*
* @return RelationsInterface
*/
public function createRelations()
{
return new \Magento\Framework\ObjectManager\Relations\Runtime();
}

/**
* Get existing code generator. Instantiate a new one if it does not exist yet.
*
* @return \Magento\Framework\Code\Generator
*/
public function getCodeGenerator()
{
if (!$this->codeGenerator) {
$generatorIo = new \Magento\Framework\Code\Generator\Io(
$this->_filesystemDriver,
$this->_generationDir
);
$this->codeGenerator = new \Magento\Framework\Code\Generator($generatorIo);
}
return $this->codeGenerator;
}
}