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<?php
namespace evelikto\di\storage;
use evelikto\di\Bean;
/** Implements logic common to all offline storages */
class OfflineStorageAdapter
{
const DI_VALUE_PREFIX = 'DI_VALUE:';
const DI_ALIAS_PREFIX = 'DI_ALIAS:';
/** @var OfflineStorage $storage The real scope storage. */
private $storage;
/** @param OfflineStorage $storage The real scope storage */
public function __construct(OfflineStorage $storage) {
$this->storage = $storage;
}
/**
* Try to read the requested dependency from the storage by its name or by an alias.
*
* @param string $name Dependency name.
* @return mixed|null Retrieved value or null if not previously stored.
*/
public function fetch($name) {
$value = $this->storage->fetch(self::DI_VALUE_PREFIX.$name);
if ($value !== null)
return $value;
$alias = $this->storage->fetch(self::DI_ALIAS_PREFIX.$name);
if ($alias !== null)
return $this->storage->fetch(self::DI_VALUE_PREFIX.$alias);
return null;
* Unpacks the supplied bean, saves the value under the main name, as well as under its aliases.
* @param Bean $bean Wrapped dependency.
* @return mixed Unwrapped dependency value.
public function store(Bean $bean) {
$this->storage->store(self::DI_VALUE_PREFIX.$bean->name, $bean->value);
foreach($bean->aliases as $alias)
$this->storage->store(self::DI_ALIAS_PREFIX.$alias, $bean->name);
return $bean->value;
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evelikto-di
