SimpleCacheAdapter::__construct() - Code Metrics - Inspection of "[WIP] Validate keys" - Roave/DoctrineSimpleCache - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#15)

by James

created 2017-01-19 11:07 UTC

SimpleCacheAdapter::__construct() A

↳ Parent: SimpleCacheAdapter

Complexity

Conditions	4
Paths	4

Size

Total Lines	14
Code Lines	8

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	9
CRAP Score	4

Importance

Changes

Metric	Value
dl	0
loc	14
ccs	9
cts	9
cp	1
rs	9.2
c	0
b	0
f	0
cc	4
eloc	8
nc	4
nop	1
crap	4

<?php
declare(strict_types = 1);

namespace Roave\DoctrineSimpleCache;

use Doctrine\Common\Cache\Cache as DoctrineCache;
use Doctrine\Common\Cache\ClearableCache;
use Doctrine\Common\Cache\MultiGetCache;
use Doctrine\Common\Cache\MultiPutCache;
use Psr\SimpleCache\CacheInterface as PsrCache;

final class SimpleCacheAdapter implements PsrCache
{
    /**
     * @var DoctrineCache|ClearableCache|MultiGetCache|MultiPutCache
     */
    private $doctrineCache;

    /**
     * @param DoctrineCache $doctrineCache
     * @throws \Roave\DoctrineSimpleCache\CacheException
     */
    public function __construct(DoctrineCache $doctrineCache)
    {
        $this->doctrineCache = $doctrineCache;

        if (!$this->doctrineCache instanceof ClearableCache) {
            throw CacheException::fromNonClearableCache($this->doctrineCache);
        }
        if (!$this->doctrineCache instanceof MultiGetCache) {
            throw CacheException::fromNonMultiGetCache($this->doctrineCache);
        }
        if (!$this->doctrineCache instanceof MultiPutCache) {
            throw CacheException::fromNonMultiPutCache($this->doctrineCache);
        }
    }

    /**
     * @param mixed $key
     * @throws \Roave\DoctrineSimpleCache\Exception\InvalidArgumentException
     */
    private function validateKey($key) : void
    {
        if (!is_string($key)) {
            throw Exception\InvalidArgumentException::fromInvalidType($key);
        }

        if ('' === $key) {
            throw Exception\InvalidArgumentException::fromEmptyKey();
        }

        if (preg_match('/[' . preg_quote('{}()/\@:', '/') . ']/', $key)) {
            throw Exception\InvalidArgumentException::fromInvalidKeyCharacters($key);
        }
    }

    /**
     * @param mixed $keys
     * @return array
     * @throws \Roave\DoctrineSimpleCache\Exception\InvalidArgumentException
     */
    private function filterValidateMultipleKeys($keys) : array
    {
        if ($keys instanceof \Traversable) {
            $keys = iterator_to_array($keys);
        }

        if (!is_array($keys)) {
            throw Exception\InvalidArgumentException::fromNonIterableKeys($keys);
        }

        array_map([$this, 'validateKey'], $keys);

        return $keys;
    }

    /**
     * {@inheritDoc}
     */
    public function get($key, $default = null)
    {
        $this->validateKey($key);

        $value = $this->doctrineCache->fetch($key);
class A
{
    public function foo() { }
}

class B extends A
{
    public function bar() { }
}

/**
 * @param A|B $x
 */
function someFunction($x)
{
    $x->foo(); // This call is fine as the method exists in A and B.
    $x->bar(); // This method only exists in B and might cause an error.
}
        if ($value === false) {
            return $default;
        }

        return $value;
    }

    /**
     * {@inheritDoc}
     */
    public function set($key, $value, $ttl = null) : bool
    {
        $this->validateKey($key);
        return $this->doctrineCache->save($key, $value, $ttl);
class A
{
    public function foo() { }
}

class B extends A
{
    public function bar() { }
}

/**
 * @param A|B $x
 */
function someFunction($x)
{
    $x->foo(); // This call is fine as the method exists in A and B.
    $x->bar(); // This method only exists in B and might cause an error.
}
    }

    /**
     * {@inheritDoc}
     */
    public function delete($key) : bool
    {
        $this->validateKey($key);
        return $this->doctrineCache->delete($key);
class A
{
    public function foo() { }
}

class B extends A
{
    public function bar() { }
}

/**
 * @param A|B $x
 */
function someFunction($x)
{
    $x->foo(); // This call is fine as the method exists in A and B.
    $x->bar(); // This method only exists in B and might cause an error.
}
    }

    /**
     * {@inheritDoc}
     */
    public function clear() : bool
    {
        return $this->doctrineCache->deleteAll();
class A
{
    public function foo() { }
}

class B extends A
{
    public function bar() { }
}

/**
 * @param A|B $x
 */
function someFunction($x)
{
    $x->foo(); // This call is fine as the method exists in A and B.
    $x->bar(); // This method only exists in B and might cause an error.
}
    }

    /**
     * @param array|\Traversable $keys
     * @param mixed $default
     * @return array
     * @throws \Roave\DoctrineSimpleCache\Exception\InvalidArgumentException
     */
    public function getMultiple($keys, $default = null)
    {
        $keys = $this->filterValidateMultipleKeys($keys);
        return array_merge(array_fill_keys($keys, $default), $this->doctrineCache->fetchMultiple($keys));
class A
{
    public function foo() { }
}

class B extends A
{
    public function bar() { }
}

/**
 * @param A|B $x
 */
function someFunction($x)
{
    $x->foo(); // This call is fine as the method exists in A and B.
    $x->bar(); // This method only exists in B and might cause an error.
}
    }

    /**
     * @param array|\Traversable $values
     * @param null|int|\DateInterval $ttl
     * @return bool
     * @throws \Roave\DoctrineSimpleCache\Exception\InvalidArgumentException
     */
    public function setMultiple($values, $ttl = null) : bool
    {
        if (!$values instanceof \Traversable && !is_array($values)) {
            throw Exception\InvalidArgumentException::fromNonIterableKeys($values);
        }

        foreach ($values as $k => $v) {
            $this->validateKey($k);
        }

        return $this->doctrineCache->saveMultiple($values, $ttl);
class A
{
    public function foo() { }
}

class B extends A
{
    public function bar() { }
}

/**
 * @param A|B $x
 */
function someFunction($x)
{
    $x->foo(); // This call is fine as the method exists in A and B.
    $x->bar(); // This method only exists in B and might cause an error.
}
    }

    /**
     * @param array|\Traversable $keys
     * @return bool
     * @throws \Roave\DoctrineSimpleCache\Exception\InvalidArgumentException
     */
    public function deleteMultiple($keys) : bool
    {
        $keys = $this->filterValidateMultipleKeys($keys);

        $success = true;
        foreach ($keys as $key) {
            if (!$this->delete($key)) {
                $success = false;
            }
        }

        return $success;
    }

    /**
     * {@inheritDoc}
     */
    public function has($key) : bool
    {
        $this->validateKey($key);
        return $this->doctrineCache->contains($key);
class A
{
    public function foo() { }
}

class B extends A
{
    public function bar() { }
}

/**
 * @param A|B $x
 */
function someFunction($x)
{
    $x->foo(); // This call is fine as the method exists in A and B.
    $x->bar(); // This method only exists in B and might cause an error.
}
    }
}


1		<?php
2		declare(strict_types = 1);
3
4		namespace Roave\DoctrineSimpleCache;
5
6		use Doctrine\Common\Cache\Cache as DoctrineCache;
7		use Doctrine\Common\Cache\ClearableCache;
8		use Doctrine\Common\Cache\MultiGetCache;
9		use Doctrine\Common\Cache\MultiPutCache;
10		use Psr\SimpleCache\CacheInterface as PsrCache;
11
12		final class SimpleCacheAdapter implements PsrCache
13		{
14		/**
15		* @var DoctrineCache\|ClearableCache\|MultiGetCache\|MultiPutCache
16		*/
17		private $doctrineCache;
18
19		/**
20		* @param DoctrineCache $doctrineCache
21		* @throws \Roave\DoctrineSimpleCache\CacheException
22		*/
23	36	public function __construct(DoctrineCache $doctrineCache)
24		{
25	36	$this->doctrineCache = $doctrineCache;
26
27	36	if (!$this->doctrineCache instanceof ClearableCache) {
28	1	throw CacheException::fromNonClearableCache($this->doctrineCache);
29		}
30	35	if (!$this->doctrineCache instanceof MultiGetCache) {
31	1	throw CacheException::fromNonMultiGetCache($this->doctrineCache);
32		}
33	34	if (!$this->doctrineCache instanceof MultiPutCache) {
34	1	throw CacheException::fromNonMultiPutCache($this->doctrineCache);
35		}
36	33	}
37
38		/**
39		* @param mixed $key
40		* @throws \Roave\DoctrineSimpleCache\Exception\InvalidArgumentException
41		*/
42	30	private function validateKey($key) : void
43		{
44	30	if (!is_string($key)) {
45	7	throw Exception\InvalidArgumentException::fromInvalidType($key);
46		}
47
48	23	if ('' === $key) {
49	1	throw Exception\InvalidArgumentException::fromEmptyKey();
50		}
51
52	22	if (preg_match('/[' . preg_quote('{}()/\@:', '/') . ']/', $key)) {
53	10	throw Exception\InvalidArgumentException::fromInvalidKeyCharacters($key);
54		}
55	12	}
56
57		/**
58		* @param mixed $keys
59		* @return array
60		* @throws \Roave\DoctrineSimpleCache\Exception\InvalidArgumentException
61		*/
62	25	private function filterValidateMultipleKeys($keys) : array
63		{
64	25	if ($keys instanceof \Traversable) {
65	2	$keys = iterator_to_array($keys);
66		}
67
68	25	if (!is_array($keys)) {
69	1	throw Exception\InvalidArgumentException::fromNonIterableKeys($keys);
70		}
71
72	24	array_map([$this, 'validateKey'], $keys);
73
74	6	return $keys;
75		}
76
77		/**
78		* {@inheritDoc}
79		*/
80	2	public function get($key, $default = null)
81		{
82	2	$this->validateKey($key);
83
84	2	$value = $this->doctrineCache->fetch($key);
		0 ignored issues – show Bug introduced 2017-01-03 10:13 UTC by Report Bug Copy Issue Report The method `fetch` does only exist in `Doctrine\Common\Cache\Cache`, but not in `Doctrine\Common\Cache\Cl...mon\Cache\MultiPutCache`. It seems like the method you are trying to call exists only in some of the possible types. Let’s take a look at an example: class A { public function foo() { } } class B extends A { public function bar() { } } /** * @param A\|B $x / function someFunction($x) { $x->foo(); // This call is fine as the method exists in A and B. $x->bar(); // This method only exists in B and might cause an error. } Available Fixes Add an additional type-check: /* * @param A\|B $x / function someFunction($x) { $x->foo(); if ($x instanceof B) { $x->bar(); } } Only allow a single type to be passed if the variable comes from a parameter: function someFunction(B $x) { /* ... */ } Loading history...
85	2	if ($value === false) {
86	1	return $default;
87		}
88
89	2	return $value;
90		}
91
92		/**
93		* {@inheritDoc}
94		*/
95	2	public function set($key, $value, $ttl = null) : bool
96		{
97	2	$this->validateKey($key);
98	2	return $this->doctrineCache->save($key, $value, $ttl);
		0 ignored issues – show Bug introduced 2017-01-03 10:02 UTC by Report Bug Copy Issue Report It seems like `$ttl` defined by parameter `$ttl` on line 95 can also be of type `null`; however, `Doctrine\Common\Cache\Cache::save()` does only seem to accept `integer`, maybe add an additional type check? This check looks at variables that have been passed in as parameters and are passed out again to other methods. If the outgoing method call has stricter type requirements than the method itself, an issue is raised. An additional type check may prevent trouble. Loading history... Bug introduced 2017-01-03 10:13 UTC by Report Bug Copy Issue Report The method `save` does only exist in `Doctrine\Common\Cache\Cache`, but not in `Doctrine\Common\Cache\Cl...mon\Cache\MultiPutCache`. It seems like the method you are trying to call exists only in some of the possible types. Let’s take a look at an example: class A { public function foo() { } } class B extends A { public function bar() { } } /** * @param A\|B $x / function someFunction($x) { $x->foo(); // This call is fine as the method exists in A and B. $x->bar(); // This method only exists in B and might cause an error. } Available Fixes Add an additional type-check: /* * @param A\|B $x / function someFunction($x) { $x->foo(); if ($x instanceof B) { $x->bar(); } } Only allow a single type to be passed if the variable comes from a parameter: function someFunction(B $x) { /* ... */ } Loading history...
99		}
100
101		/**
102		* {@inheritDoc}
103		*/
104	3	public function delete($key) : bool
105		{
106	3	$this->validateKey($key);
107	3	return $this->doctrineCache->delete($key);
		0 ignored issues – show Bug introduced 2017-01-03 10:13 UTC by Report Bug Copy Issue Report The method `delete` does only exist in `Doctrine\Common\Cache\Cache`, but not in `Doctrine\Common\Cache\Cl...mon\Cache\MultiPutCache`. It seems like the method you are trying to call exists only in some of the possible types. Let’s take a look at an example: class A { public function foo() { } } class B extends A { public function bar() { } } /** * @param A\|B $x / function someFunction($x) { $x->foo(); // This call is fine as the method exists in A and B. $x->bar(); // This method only exists in B and might cause an error. } Available Fixes Add an additional type-check: /* * @param A\|B $x / function someFunction($x) { $x->foo(); if ($x instanceof B) { $x->bar(); } } Only allow a single type to be passed if the variable comes from a parameter: function someFunction(B $x) { /* ... */ } Loading history...
108		}
109
110		/**
111		* {@inheritDoc}
112		*/
113	1	public function clear() : bool
114		{
115	1	return $this->doctrineCache->deleteAll();
		0 ignored issues – show Bug introduced 2017-01-03 10:13 UTC by Report Bug Copy Issue Report The method `deleteAll` does only exist in `Doctrine\Common\Cache\ClearableCache`, but not in `Doctrine\Common\Cache\Ca...mon\Cache\MultiPutCache`. It seems like the method you are trying to call exists only in some of the possible types. Let’s take a look at an example: class A { public function foo() { } } class B extends A { public function bar() { } } /** * @param A\|B $x / function someFunction($x) { $x->foo(); // This call is fine as the method exists in A and B. $x->bar(); // This method only exists in B and might cause an error. } Available Fixes Add an additional type-check: /* * @param A\|B $x / function someFunction($x) { $x->foo(); if ($x instanceof B) { $x->bar(); } } Only allow a single type to be passed if the variable comes from a parameter: function someFunction(B $x) { /* ... */ } Loading history...
116		}
117
118		/**
119		* @param array\|\Traversable $keys
120		* @param mixed $default
121		* @return array
122		* @throws \Roave\DoctrineSimpleCache\Exception\InvalidArgumentException
123		*/
124	23	public function getMultiple($keys, $default = null)
125		{
126	23	$keys = $this->filterValidateMultipleKeys($keys);
127	4	return array_merge(array_fill_keys($keys, $default), $this->doctrineCache->fetchMultiple($keys));
		0 ignored issues – show Bug introduced 2017-01-03 10:13 UTC by Report Bug Copy Issue Report The method `fetchMultiple` does only exist in `Doctrine\Common\Cache\MultiGetCache`, but not in `Doctrine\Common\Cache\Ca...mon\Cache\MultiPutCache`. It seems like the method you are trying to call exists only in some of the possible types. Let’s take a look at an example: class A { public function foo() { } } class B extends A { public function bar() { } } /** * @param A\|B $x / function someFunction($x) { $x->foo(); // This call is fine as the method exists in A and B. $x->bar(); // This method only exists in B and might cause an error. } Available Fixes Add an additional type-check: /* * @param A\|B $x / function someFunction($x) { $x->foo(); if ($x instanceof B) { $x->bar(); } } Only allow a single type to be passed if the variable comes from a parameter: function someFunction(B $x) { /* ... / } Loading history... Bug Best Practice introduced 2017-01-05 16:15 UTC by Report Bug Copy Issue Report The return type of `return array_merge(array...>fetchMultiple($keys));` (`array`) is incompatible with the return type declared by the interface `Psr\SimpleCache\CacheInterface::getMultiple` of type `Psr\SimpleCache\iterable`. 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...
128		}
129
130		/**
131		* @param array\|\Traversable $values
132		* @param null\|int\|\DateInterval $ttl
133		* @return bool
134		* @throws \Roave\DoctrineSimpleCache\Exception\InvalidArgumentException
135		*/
136	3	public function setMultiple($values, $ttl = null) : bool
137		{
138	3	if (!$values instanceof \Traversable && !is_array($values)) {
139	1	throw Exception\InvalidArgumentException::fromNonIterableKeys($values);
140		}
141
142	2	foreach ($values as $k => $v) {
143	2	$this->validateKey($k);
144		}
145
146	2	return $this->doctrineCache->saveMultiple($values, $ttl);
		0 ignored issues – show Bug introduced 2017-01-03 10:13 UTC by Report Bug Copy Issue Report The method `saveMultiple` does only exist in `Doctrine\Common\Cache\MultiPutCache`, but not in `Doctrine\Common\Cache\Ca...mon\Cache\MultiGetCache`. It seems like the method you are trying to call exists only in some of the possible types. Let’s take a look at an example: class A { public function foo() { } } class B extends A { public function bar() { } } /** * @param A\|B $x / function someFunction($x) { $x->foo(); // This call is fine as the method exists in A and B. $x->bar(); // This method only exists in B and might cause an error. } Available Fixes Add an additional type-check: /* * @param A\|B $x / function someFunction($x) { $x->foo(); if ($x instanceof B) { $x->bar(); } } Only allow a single type to be passed if the variable comes from a parameter: function someFunction(B $x) { /* ... */ } Loading history... Bug introduced 2017-01-19 11:14 UTC by Report Bug Copy Issue Report It seems like `$values` defined by parameter `$values` on line 136 can also be of type `object<Traversable>`; however, `Doctrine\Common\Cache\Mu...utCache::saveMultiple()` does only seem to accept `array`, maybe add an additional type check? This check looks at variables that have been passed in as parameters and are passed out again to other methods. If the outgoing method call has stricter type requirements than the method itself, an issue is raised. An additional type check may prevent trouble. Loading history... Bug introduced 2017-01-19 11:14 UTC by Report Bug Copy Issue Report It seems like `$ttl` defined by parameter `$ttl` on line 136 can also be of type `null` or `object<DateInterval>`; however, `Doctrine\Common\Cache\Mu...utCache::saveMultiple()` does only seem to accept `integer`, maybe add an additional type check? This check looks at variables that have been passed in as parameters and are passed out again to other methods. If the outgoing method call has stricter type requirements than the method itself, an issue is raised. An additional type check may prevent trouble. Loading history...
147		}
148
149		/**
150		* @param array\|\Traversable $keys
151		* @return bool
152		* @throws \Roave\DoctrineSimpleCache\Exception\InvalidArgumentException
153		*/
154	2	public function deleteMultiple($keys) : bool
155		{
156	2	$keys = $this->filterValidateMultipleKeys($keys);
157
158	2	$success = true;
159	2	foreach ($keys as $key) {
160	2	if (!$this->delete($key)) {
161	2	$success = false;
162		}
163		}
164
165	2	return $success;
166		}
167
168		/**
169		* {@inheritDoc}
170		*/
171	1	public function has($key) : bool
172		{
173	1	$this->validateKey($key);
174	1	return $this->doctrineCache->contains($key);
		0 ignored issues – show Bug introduced 2017-01-03 10:13 UTC by Report Bug Copy Issue Report The method `contains` does only exist in `Doctrine\Common\Cache\Cache`, but not in `Doctrine\Common\Cache\Cl...mon\Cache\MultiPutCache`. It seems like the method you are trying to call exists only in some of the possible types. Let’s take a look at an example: class A { public function foo() { } } class B extends A { public function bar() { } } /** * @param A\|B $x / function someFunction($x) { $x->foo(); // This call is fine as the method exists in A and B. $x->bar(); // This method only exists in B and might cause an error. } Available Fixes Add an additional type-check: /* * @param A\|B $x / function someFunction($x) { $x->foo(); if ($x instanceof B) { $x->bar(); } } Only allow a single type to be passed if the variable comes from a parameter: function someFunction(B $x) { /* ... */ } Loading history...
175		}
176		}
177

Roave / DoctrineSimpleCache

Pull Request — master (#15)

SimpleCacheAdapter::__construct() A

Complexity

Size

Duplication

Code Coverage

Importance

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Available Fixes

Duplication Side-by-Side

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