AttributeExtractor - Code Metrics - Happyr/SerializerBundle - Measure and Improve Code Quality continuously with Scrutinizer

AttributeExtractor A
last analyzed 2016-07-14 23:03 UTC

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Complexity

Total Complexity

Size/Duplication

Total Lines	90
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	0

Test Coverage

Coverage

90.91%

Importance

Changes	2
Bugs	1	Features	0

Metric	Value
wmc	14
c	2
b	1
f	0
lcom	1
cbo	0
dl	0
loc	90
ccs	30
cts	33
cp	0.9091
rs	10

3 Methods

Rating	Name	Size	Complexity
A	getAttributes()	17	4
C	extractAttributes()	33	8
A	getCacheKey()	9	2

<?php

namespace Happyr\SerializerBundle\PropertyManager;

/**
 * Extract attributes from object.
 *
 * @author Tobias Nyholm <[email protected]>
 */
class AttributeExtractor
{
    /**
     * @var array
     */
    private $attributesCache = [];

    /**
     * Gets and caches attributes for this class and context.
     *
     * @param object|string $object
     *
     * @return string[]
     */
    public function getAttributes($object)
    {
        if (is_string($object)) {
            $class = $object;
        } else {
            $class = get_class($object);
        }

        // get cache key
        if (false !== $key = $this->getCacheKey($class)) {
            if (isset($this->attributesCache[$key])) {
                return $this->attributesCache[$key];
            }
        }

        return $this->attributesCache[$key] = $this->extractAttributes($class);
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());
}
    }

    /**
     * Extracts attributes for this class and context.
     *
     * @param string $class
     *
     * @return string[]
     */
    private function extractAttributes($class)
    {
        // If not using groups, detect manually
        $attributes = ['property' => [], 'method' => []];

        // methods
        $reflClass = new \ReflectionClass($class);
        foreach ($reflClass->getMethods(\ReflectionMethod::IS_PUBLIC) as $reflMethod) {
            if (
                $reflMethod->getNumberOfRequiredParameters() !== 0 ||
                $reflMethod->isStatic() ||
                $reflMethod->isConstructor() ||
                $reflMethod->isDestructor()
            ) {
                continue;
            }

            $name = $reflMethod->name;

            $attributes['method'][$name] = true;
        }

        // properties
        foreach ($reflClass->getProperties() as $reflProperty) {
            if ($reflProperty->isStatic()) {
                continue;
            }

            $attributes['property'][$reflProperty->name] = true;
        }

        return $attributes;
    }

    /**
     * Get a good cache key for this class.
     *
     * @param $class
     *
     * @return bool|string
     */
    private function getCacheKey($class)
    {
        try {
            return md5($class);
        } catch (\Exception $e) {
            // The context cannot be serialized, skip the cache
            return false;
        }
    }
}


1		<?php
2
3		namespace Happyr\SerializerBundle\PropertyManager;
4
5		/**
6		* Extract attributes from object.
7		*
8		* @author Tobias Nyholm <[email protected]>
9		*/
10		class AttributeExtractor
11		{
12		/**
13		* @var array
14		*/
15		private $attributesCache = [];
16
17		/**
18		* Gets and caches attributes for this class and context.
19		*
20		* @param object\|string $object
21		*
22		* @return string[]
23		*/
24	23	public function getAttributes($object)
25		{
26	23	if (is_string($object)) {
27	23	$class = $object;
28	23	} else {
29	11	$class = get_class($object);
30		}
31
32		// get cache key
33	23	if (false !== $key = $this->getCacheKey($class)) {
34	23	if (isset($this->attributesCache[$key])) {
35	1	return $this->attributesCache[$key];
36		}
37	23	}
38
39	23	return $this->attributesCache[$key] = $this->extractAttributes($class);
		0 ignored issues – show Bug Best Practice introduced 2016-07-14 20:59 UTC by Report Bug Copy Issue Report The return type of `return $this->attributes...ractAttributes($class);` (`array<string,array>`) is incompatible with the return type documented by `Happyr\SerializerBundle\...xtractor::getAttributes` of type `string[]`. 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...
40		}
41
42		/**
43		* Extracts attributes for this class and context.
44		*
45		* @param string $class
46		*
47		* @return string[]
48		*/
49	23	private function extractAttributes($class)
50		{
51		// If not using groups, detect manually
52	23	$attributes = ['property' => [], 'method' => []];
53
54		// methods
55	23	$reflClass = new \ReflectionClass($class);
56	23	foreach ($reflClass->getMethods(\ReflectionMethod::IS_PUBLIC) as $reflMethod) {
57		if (
58	23	$reflMethod->getNumberOfRequiredParameters() !== 0 \|\|
59	23	$reflMethod->isStatic() \|\|
60	23	$reflMethod->isConstructor() \|\|
61	23	$reflMethod->isDestructor()
62	23	) {
63	23	continue;
64		}
65
66	23	$name = $reflMethod->name;
67
68	23	$attributes['method'][$name] = true;
69	23	}
70
71		// properties
72	23	foreach ($reflClass->getProperties() as $reflProperty) {
73	23	if ($reflProperty->isStatic()) {
74		continue;
75		}
76
77	23	$attributes['property'][$reflProperty->name] = true;
78	23	}
79
80	23	return $attributes;
81		}
82
83		/**
84		* Get a good cache key for this class.
85		*
86		* @param $class
87		*
88		* @return bool\|string
89		*/
90	23	private function getCacheKey($class)
91		{
92		try {
93	23	return md5($class);
94		} catch (\Exception $e) {
95		// The context cannot be serialized, skip the cache
96		return false;
97		}
98		}
99		}
100

Happyr / SerializerBundle

AttributeExtractor A last analyzed 2016-07-14 23:03 UTC

Complexity

Size/Duplication

Coupling/Cohesion

Test Coverage

Importance

3 Methods

Duplication Side-by-Side

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AttributeExtractor A
last analyzed 2016-07-14 23:03 UTC