<?php

namespace Metadata\Cache;

use Metadata\ClassMetadata;
use Psr\Cache\CacheItemPoolInterface;

class PsrCacheAdapter implements CacheInterface
{
private $prefix;
private $pool;
private $lastItem;

public function __construct($prefix, CacheItemPoolInterface $pool)
{
$this->prefix = $prefix;
$this->pool = $pool;
}

/**
* {@inheritDoc}
*/
public function loadClassMetadataFromCache(\ReflectionClass $class)
{
$this->lastItem = $this->pool->getItem(strtr($this->prefix . $class->name, '\\', '.'));

return $this->lastItem->get();
}

/**
* {@inheritDoc}
*/
public function putClassMetadataInCache(ClassMetadata $metadata)
{
$key = strtr($this->prefix . $metadata->name, '\\', '.');

if (null === $this->lastItem || $this->lastItem->getKey() !== $key) {
$this->lastItem = $this->pool->getItem($key);
}

$this->pool->save($this->lastItem->set($metadata));
}

/**
* {@inheritDoc}
*/
public function evictClassMetadataFromCache(\ReflectionClass $class)
{
$this->pool->deleteItem(strtr($this->prefix . $class->name, '\\', '.'));
}
}