NoCachePool - Code Metrics - 3rdpartyeve/perry - Measure and Improve Code Quality continuously with Scrutinizer

NoCachePool A
last analyzed 2016-02-15 16:56 UTC

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Complexity

Total Complexity

Size/Duplication

Total Lines	32
Duplicated Lines	0 %

Coupling/Cohesion

Components	0
Dependencies	1

Importance

Changes	2
Bugs	0	Features	0

Metric	Value
wmc	4
c	2
b	0
f	0
lcom	0
cbo	1
dl	0
loc	32
rs	10

3 Methods

Rating	Name	Size	Complexity
A	getItem()	4	1
A	getItems()	8	2
A	clear()	4	1

<?php

namespace Perry\Cache\NoCache;

use Psr\Cache\PoolInterface;

/**
 * Class will always return non-hits
 *
 * @package Perry\Cache\NoCache
 */
class NoCachePool implements PoolInterface
{
    /**
     * @param string $key
     * @return NoCacheItem|\Psr\Cache\ItemInterface
     */
    public function getItem($key)
    {
        return new NoCacheItem($key);
    }

    /**
     * @param array $keys
     * @return array|\Traversable
     */
    public function getItems(array $keys)
    {
        $result = [];
        foreach ($keys as $key) {
            $result[$key] = $this->getItem($key);
        }
        return $result;
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());
}
    }

    /**
     * @return $this|PoolInterface
     */
    public function clear()
    {
        return $this;
    }
}


1			<?php
2
3			namespace Perry\Cache\NoCache;
4
5			use Psr\Cache\PoolInterface;
6
7			/**
8			* Class will always return non-hits
9			*
10			* @package Perry\Cache\NoCache
11			*/
12			class NoCachePool implements PoolInterface
13			{
14			/**
15			* @param string $key
16			* @return NoCacheItem\|\Psr\Cache\ItemInterface
17			*/
18			public function getItem($key)
19			{
20			return new NoCacheItem($key);
21			}
22
23			/**
24			* @param array $keys
25			* @return array\|\Traversable
26			*/
27			public function getItems(array $keys)
28			{
29			$result = [];
30			foreach ($keys as $key) {
31			$result[$key] = $this->getItem($key);
32			}
33			return $result;
			0 ignored issues – show Bug Best Practice introduced 2016-02-15 16:56 UTC by Report Bug Copy Issue Report The return type of `return $result;` (`array`) is incompatible with the return type declared by the interface `Psr\Cache\PoolInterface::getItems` of type `Traversable`. 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. Loading history...
34			}
35
36			/**
37			* @return $this\|PoolInterface
38			*/
39			public function clear()
40			{
41			return $this;
42			}
43			}
44

3rdpartyeve / perry

NoCachePool A last analyzed 2016-02-15 16:56 UTC

Complexity

Size/Duplication

Coupling/Cohesion

Importance

3 Methods

Duplication Side-by-Side

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NoCachePool A
last analyzed 2016-02-15 16:56 UTC