FixedTaggingCachePool::hasItem()   A
last analyzed

Complexity

Conditions 1
Paths 1

Size

Total Lines 4
Code Lines 2

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 0
CRAP Score 2

Importance

Changes 0
Metric Value
c 0
b 0
f 0
dl 0
loc 4
ccs 0
cts 4
cp 0
rs 10
cc 1
eloc 2
nc 1
nop 1
crap 2
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<?php
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/*
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 * This file is part of php-cache\cache-bundle package.
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 *
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 * (c) 2015 Aaron Scherer <[email protected]>, Tobias Nyholm <[email protected]>
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 *
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 * This source file is subject to the MIT license that is bundled
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 * with this source code in the file LICENSE.
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 */
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namespace Cache\CacheBundle\Cache;
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use Cache\TagInterop\TaggableCacheItemInterface;
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use Cache\TagInterop\TaggableCacheItemPoolInterface;
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use Psr\Cache\CacheItemInterface;
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/**
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 * This class is a decorator for a TaggableCacheItemPoolInterface. It tags everything with predefined tags.
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 *
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 * @author Tobias Nyholm <[email protected]>
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 *
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 * @internal
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 */
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class FixedTaggingCachePool implements TaggableCacheItemPoolInterface
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{
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    /**
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     * @type TaggableCacheItemPoolInterface
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     */
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    private $cache;
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    /**
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     * @type array
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     */
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    private $tags;
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    /**
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     * @param TaggableCacheItemPoolInterface $cache
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     * @param array                          $tags
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     */
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    public function __construct(TaggableCacheItemPoolInterface $cache, array $tags)
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    {
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        $this->cache = $cache;
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        $this->tags  = $tags;
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function getItem($key)
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    {
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        return $this->cache->getItem($key);
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function getItems(array $keys = [])
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    {
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        return $this->cache->getItems($keys);
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function hasItem($key)
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    {
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        return $this->cache->hasItem($key);
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function clear()
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    {
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        return $this->cache->clear();
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function deleteItem($key)
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    {
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        return $this->cache->deleteItem($key);
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function deleteItems(array $keys)
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    {
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        return $this->cache->deleteItems($keys);
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function save(CacheItemInterface $item)
0 ignored issues
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Duplication introduced by
This method seems to be duplicated in your project.

Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.

You can also find more detailed suggestions in the “Code” section of your repository.

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    {
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        if (!$item instanceof TaggableCacheItemInterface) {
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            throw new \InvalidArgumentException('Cache items are not transferable between pools. Item MUST implement TaggableCacheItemInterface.');
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        }
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        $item->setTags($this->tags);
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        return $this->cache->save($item);
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function saveDeferred(CacheItemInterface $item)
0 ignored issues
show
Duplication introduced by
This method seems to be duplicated in your project.

Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.

You can also find more detailed suggestions in the “Code” section of your repository.

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    {
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        if (!$item instanceof TaggableCacheItemInterface) {
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            throw new \InvalidArgumentException('Cache items are not transferable between pools. Item MUST implement TaggableCacheItemInterface.');
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        }
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        $item->setTags($this->tags);
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        return $this->cache->saveDeferred($item);
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function commit()
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    {
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        return $this->cache->commit();
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function invalidateTag($tag)
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    {
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        return $this->invalidateTag($tag);
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function invalidateTags(array $tags)
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    {
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        return $this->cache - $this->invalidateTags($tags);
0 ignored issues
show
Bug Best Practice introduced by
The return type of return $this->cache - $t...>invalidateTags($tags); (integer|double) is incompatible with the return type declared by the interface Cache\TagInterop\Taggabl...terface::invalidateTags of type boolean.

If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design.

Let’s take a look at an example:

class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}

Our function my_function expects a Post object, and outputs the author of the post. The base class Post returns a simple string and outputting a simple string will work just fine. However, the child class BlogPost which is a sub-type of Post instead decided to return an object, and is therefore violating the SOLID principles. If a BlogPost were passed to my_function, PHP would not complain, but ultimately fail when executing the strtoupper call in its body.

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    }
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}
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