<?php 
/**
 * 	 Demo Code
 *  
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program. If not, see <http://www.gnu.org/licenses/gpl.txt/>.
 * 
 *   The copyright holder may be reached by emailing john@kleijnweb.nl
 * 	 
 *   
 * 
 * @copyright 	Copyright (C) 2010  Kleijn Web Development
 * @license 	http://www.gnu.org/licenses/gpl.txt GNU General Public License
 */
namespace kwd\blog\virtualproxy;

/**
 * Factory for virtual proxies 
 *
 * @category virtualproxy
 * @package kwd\blog\virtualproxy
 */
class ProxyFactory
{
	/**
	 * @var kwd\blog\virtualproxy\ProxyGenerator
	 */
	private $_generator;
	
	/**
	 * Create a new factory
	 * 
	 * @param ProxyGenerator $generator
	 */
	public function __construct(ProxyGenerator $generator)
	{
		$this->_generator = $generator;
	}
	
	/**
	 * Construct a proxy
	 * 
	 * @param string $subjectName
	 * @param kwd\blog\virtualproxy\Loader
	 * @param array $constructionArgs
	 * @return object
	 */
	public function createProxy($subjectName, Loader $loader, array $constructionArgs = array())
	{
		$proxyName = $this->_generator->getProxyName($subjectName);
		
		if(!class_exists($proxyName, true))
		{
			if(eval($this->_generator->generate($subjectName)) !== null)
			{
				throw new Exception("Generation of proxy failed");
			}
		}
		
		$refl = new \ReflectionClass($proxyName);
		
		if($refl->hasMethod('__construct'))
		{
			$proxy = $refl->newInstanceArgs($constructionArgs);
		}
		else
		{
			$proxy = new $proxyName;
		}
		
		$property = $refl->getProperty('_loader');
		$property->setAccessible(true);
		$property->setValue($proxy, $loader);
		
		return $proxy;
	}
}