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/*
* This file is part of the ICanBoogie package.
*
* (c) Olivier Laviale <olivier.laviale@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace ICanBoogie\Storage;
/**
* A collection of {@link Cache} instances.
*
* @package ICanBoogie\Storage
*/
class CacheCollection implements Cache
{
/**
* @var Cache[]
*/
protected $collection = [];
public function __construct(array $collection)
{
$this->collection = $collection;
}
/**
* @inheritdoc
*/
public function exists($key)
{
foreach ($this->collection as $cache)
{
if ($cache->exists($key))
{
return true;
}
}
return false;
}
/**
* @inheritdoc
*/
public function retrieve($key)
{
foreach ($this->collection as $cache)
{
if ($cache->exists($key))
{
return $cache->retrieve($key);
}
}
return null;
}
/**
* @inheritdoc
*/
public function getIterator()
{
return reset($this->collection)->getIterator();
}
/**
* Finds a cache by type.
*
* @param string $type The class or interface of the storage to find.
*
* @return Cache|null The cache matching the specified type or `null` if none match.
*/
public function find_by_type($type)
{
foreach ($this->collection as $cache)
{
if ($cache instanceof $type)
{
return $cache;
}
}
return null;
}
}