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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Templating\Loader;
use Symfony\Component\Templating\Storage\Storage;
use Symfony\Component\Templating\TemplateReferenceInterface;
/**
* ChainLoader is a loader that calls other loaders to load templates.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class ChainLoader extends Loader
{
protected $loaders = array();
/**
* Constructor.
*
* @param LoaderInterface[] $loaders An array of loader instances
*/
public function __construct(array $loaders = array())
{
foreach ($loaders as $loader) {
$this->addLoader($loader);
}
}
/**
* Adds a loader instance.
*
* @param LoaderInterface $loader A Loader instance
*/
public function addLoader(LoaderInterface $loader)
{
$this->loaders[] = $loader;
}
/**
* Loads a template.
*
* @param TemplateReferenceInterface $template A template
*
* @return Storage|Boolean false if the template cannot be loaded, a Storage instance otherwise
*/
public function load(TemplateReferenceInterface $template)
{
foreach ($this->loaders as $loader) {
if (false !== $storage = $loader->load($template)) {
return $storage;
}
}
return false;
}
/**
* Returns true if the template is still fresh.
*
* @param TemplateReferenceInterface $template A template
* @param integer $time The last modification time of the cached template (timestamp)
*
* @return Boolean
*/
public function isFresh(TemplateReferenceInterface $template, $time)
{
foreach ($this->loaders as $loader) {
return $loader->isFresh($template, $time);
}
return false;
}
}