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CacheItem.php
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CacheItem.php
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<?php
/*
* This file is part of php-cache organization.
*
* (c) 2015-2015 Aaron Scherer <[email protected]>, Tobias Nyholm <[email protected]>
*
* This source file is subject to the MIT license that is bundled
* with this source code in the file LICENSE.
*/
namespace Cache\Adapter\Common;
use Cache\Taggable\TaggableItemInterface;
use Cache\Taggable\TaggableItemTrait;
use Psr\Cache\CacheItemInterface;
/**
* @author Aaron Scherer <[email protected]>
* @author Tobias Nyholm <[email protected]>
*/
class CacheItem implements HasExpirationDateInterface, CacheItemInterface, TaggableItemInterface
{
use TaggableItemTrait;
/**
* @type \Closure
*/
private $callable;
/**
* @type string
*/
private $key;
/**
* @type mixed
*/
private $value;
/**
* @type \DateTimeInterface|null
*/
private $expirationDate = null;
/**
* @type bool
*/
private $hasValue = false;
/**
* @param string $key
* @param \Closure|bool $callable or boolean hasValue
*/
public function __construct($key, $callable = null, $value = null)
{
$this->taggedKey = $key;
$this->key = $this->getKeyFromTaggedKey($key);
if ($callable === true) {
$this->hasValue = true;
$this->value = $value;
} elseif ($callable !== false) {
// This must be a callable or null
$this->callable = $callable;
}
}
/**
* {@inheritdoc}
*/
public function getKey()
{
return $this->key;
}
/**
* {@inheritdoc}
*/
public function set($value)
{
$this->value = $value;
$this->hasValue = true;
$this->callable = null;
return $this;
}
/**
* {@inheritdoc}
*/
public function get()
{
if (!$this->isHit()) {
return;
}
return $this->value;
}
/**
* {@inheritdoc}
*/
public function isHit()
{
if ($this->callable !== null) {
// Initialize
$f = $this->callable;
list($this->hasValue, $this->value) = $f();
$this->callable = null;
}
if (!$this->hasValue) {
return false;
}
if ($this->expirationDate !== null) {
return $this->expirationDate > new \DateTime();
}
return true;
}
/**
* {@inheritdoc}
*/
public function getExpirationDate()
{
return $this->expirationDate;
}
/**
* {@inheritdoc}
*/
public function expiresAt($expiration)
{
if ($expiration instanceof \DateTimeInterface) {
$this->expirationDate = clone $expiration;
} else {
$this->expirationDate = $expiration;
}
return $this;
}
/**
* {@inheritdoc}
*/
public function expiresAfter($time)
{
if ($time === null) {
$this->expirationDate = null;
}
if ($time instanceof \DateInterval) {
$this->expirationDate = new \DateTime();
$this->expirationDate->add($time);
}
if (is_int($time)) {
$this->expirationDate = new \DateTime(sprintf('+%sseconds', $time));
}
return $this;
}
}