Container::get() - Code Metrics - simply-framework/container - Measure and Improve Code Quality continuously with Scrutinizer

Container::get() A
last analyzed 2018-10-17 10:30 UTC

↳ Parent: Container

Complexity

Conditions	3
Paths	3

Size

Total Lines	16
Code Lines	9

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	9
CRAP Score	3

Importance

Changes

Metric	Value
cc	3
eloc	9
nc	3
nop	1
dl	0
loc	16
ccs	9
cts	9
cp	1
crap	3
rs	9.9666
c	0
b	0
f	0

<?php

namespace Simply\Container;

use Psr\Container\ContainerExceptionInterface;
use Psr\Container\ContainerInterface;
use Psr\Container\NotFoundExceptionInterface;
use Simply\Container\Entry\EntryInterface;
use Simply\Container\Entry\MixedEntry;
use Simply\Container\Exception\ContainerException;
use Simply\Container\Exception\NotFoundException;

/**
 * Dependency Injection Container that supports different types of entries.
 *
 * @author Riikka Kalliomäki <[email protected]>
 * @copyright Copyright (c) 2017-2018 Riikka Kalliomäki
 * @license http://opensource.org/licenses/mit-license.php MIT License
 */
class Container implements ContainerInterface, \ArrayAccess
{
    /** @var array[] Information about cached container entries */
    protected $entries = [];

    /** @var EntryInterface[] Cached entry instances used to resolve values */
    private $entryCache;

    /** @var array Cached values for container entries */
    private $valueCache;

    /** @var ContainerInterface Delegate container provided for dependency resolution */
    private $delegate;

    /**
     * Container constructor.
     */
    public function __construct()
    {
        $this->entryCache = [];
        $this->valueCache = [];
        $this->delegate = $this;
    }

    /**
     * Sets the delegate container that is provided for dependency resolution.
     * @param ContainerInterface $delegate Delegate container to use for dependency resolution
     */
    public function setDelegate(ContainerInterface $delegate): void
    {
        $this->delegate = $delegate;
    }

    /**
     * Returns PHP code for a cached container that can be loaded quickly on runtime.
     * @param callable $encoder Encoder to turn the cached entry data into PHP code or null for default
     * @return string The PHP code for the cached container
     * @throws ContainerException If the container contains entries that cannot be cached
     */
    public function getCacheFile(callable $encoder = null): string
    {
        if (\is_null($encoder)) {
            $encoder = function ($value): string {
                return var_export($value, true);
            };
        }

        $this->loadCacheParameters();
        ksort($this->entries);
        $encoded = $encoder($this->entries);

        return <<<TEMPLATE
<?php return new class extends \Simply\Container\Container {
    protected \$entries = $encoded;
};
TEMPLATE;
    }

    /**
     * Loads the cache parameters for all entries.
     * @throws ContainerException If the container contains entries that cannot be cached
     */
    private function loadCacheParameters(): void
    {
        foreach ($this->entryCache as $id => $entry) {
            $parameters = $entry->getCacheParameters();

            if (!$this->isConstantValue($parameters)) {
                throw new ContainerException("Unable to cache entry '$id', the cache parameters are not static");
            }

            $this->entries[$id] = [\get_class($entry), $parameters];
        }
    }

    /**
     * Tells if the given value is a static PHP value.
     * @param mixed $value The value to test
     * @return bool True if the value is a static PHP value, false if not
     */
    private function isConstantValue($value): bool
    {
        if (\is_array($value)) {
            foreach ($value as $item) {
                if (!$this->isConstantValue($item)) {
                    return false;
                }
            }

            return true;
        }

        return is_scalar($value) || \is_null($value);
    }

    /**
     * Adds an entry to the container.
     * @param string $id The identifier for the container entry
     * @param EntryInterface $type The container entry to add
     * @throws ContainerException If trying to add an entry to an identifier that already exists
     */
    public function addEntry(string $id, EntryInterface $type): void
    {
        if (isset($this[$id])) {
            throw new ContainerException("Entry for identifier '$id' already exists");
        }

        $this->entryCache[$id] = $type;
    }

    /**
     * Returns value for the container entry with the given identifier.
     * @param string $id The entry identifier to look for
     * @return mixed The value for the entry
     * @throws NotFoundExceptionInterface If the entry cannot be found
     * @throws ContainerExceptionInterface If there are errors trying to load dependencies
     */
    public function get($id)
    {
        if (array_key_exists($id, $this->valueCache)) {
            return $this->valueCache[$id];
        }

        $entry = $this->getEntry($id);
        $value = $entry->getValue($this->delegate);

        if ($entry->isFactory()) {
            $this->entryCache[$id] = $entry;
        } else {
            $this->valueCache[$id] = $value;
        }

        return $value;
    }

    /**
     * Returns container entry for the given identifier.
     * @param string $id The entry identifier to look for
     * @return EntryInterface The container entry for the given identifier
     * @throws NotFoundExceptionInterface If the entry cannot be found
     * @throws ContainerException If the cached type is not a valid entry type
     */
    private function getEntry(string $id): EntryInterface
    {
        if (isset($this->entryCache[$id])) {
            return $this->entryCache[$id];
        }

        if (!isset($this->entries[$id])) {
            throw new NotFoundException("No entry was found for the identifier '$id'");
        }

        /** @var EntryInterface $class */
        [$class, $parameters] = $this->entries[$id];
        return $class::createFromCacheParameters($parameters);
    }

    /**
     * Tells if the entry with the given identifier exists in the container.
     * @param string $id The entry identifier to look for
     * @return bool True if an entry with the given identifier exists, false otherwise
     */
    public function has($id): bool
    {
        return isset($this->entries[$id]) || isset($this->entryCache[$id]);
    }

    /**
     * Tells if the entry with the given identifier exists in the container.
     * @param string $offset The entry identifier to look for
     * @return bool True if an entry with the given identifier exists, false otherwise
     */
    public function offsetExists($offset): bool
    {
        return $this->has($offset);
    }

    /**
     * Returns value for the container entry with the given identifier.
     * @param string $offset The entry identifier to look for
     * @return mixed The value for the entry
     * @throws NotFoundExceptionInterface If the entry cannot be found
     * @throws ContainerExceptionInterface If there are errors trying to load dependencies
     */
    public function offsetGet($offset)
    {
        return $this->get($offset);
    }

    /**
     * Adds a container entry with a mixed type.
     * @param string $offset The identifier for the container entry
     * @param mixed $value The value for the container entry
     * @throws ContainerException If trying to add an entry to an identifier that already exists
     */
    public function offsetSet($offset, $value): void
    {
        $this->addEntry($offset, new MixedEntry($value));
    }

    /**
     * Removes an entry from the container.
     * @param string $offset The identifier of the container entry to remove
     */
    public function offsetUnset($offset): void
    {
        unset(
            $this->entries[$offset],
            $this->entryCache[$offset],
            $this->valueCache[$offset]
        );
    }
}


1		<?php
2
3		namespace Simply\Container;
4
5		use Psr\Container\ContainerExceptionInterface;
6		use Psr\Container\ContainerInterface;
7		use Psr\Container\NotFoundExceptionInterface;
8		use Simply\Container\Entry\EntryInterface;
9		use Simply\Container\Entry\MixedEntry;
10		use Simply\Container\Exception\ContainerException;
11		use Simply\Container\Exception\NotFoundException;
12
13		/**
14		* Dependency Injection Container that supports different types of entries.
15		*
16		* @author Riikka Kalliomäki <[email protected]>
17		* @copyright Copyright (c) 2017-2018 Riikka Kalliomäki
18		* @license http://opensource.org/licenses/mit-license.php MIT License
19		*/
20		class Container implements ContainerInterface, \ArrayAccess
21		{
22		/** @var array[] Information about cached container entries */
23		protected $entries = [];
24
25		/** @var EntryInterface[] Cached entry instances used to resolve values */
26		private $entryCache;
27
28		/** @var array Cached values for container entries */
29		private $valueCache;
30
31		/** @var ContainerInterface Delegate container provided for dependency resolution */
32		private $delegate;
33
34		/**
35		* Container constructor.
36		*/
37	17	public function __construct()
38		{
39	17	$this->entryCache = [];
40	17	$this->valueCache = [];
41	17	$this->delegate = $this;
42	17	}
43
44		/**
45		* Sets the delegate container that is provided for dependency resolution.
46		* @param ContainerInterface $delegate Delegate container to use for dependency resolution
47		*/
48	1	public function setDelegate(ContainerInterface $delegate): void
49		{
50	1	$this->delegate = $delegate;
51	1	}
52
53		/**
54		* Returns PHP code for a cached container that can be loaded quickly on runtime.
55		* @param callable $encoder Encoder to turn the cached entry data into PHP code or null for default
56		* @return string The PHP code for the cached container
57		* @throws ContainerException If the container contains entries that cannot be cached
58		*/
59	7	public function getCacheFile(callable $encoder = null): string
60		{
61	7	if (\is_null($encoder)) {
62		$encoder = function ($value): string {
63	6	return var_export($value, true);
64	7	};
65		}
66
67	7	$this->loadCacheParameters();
68	6	ksort($this->entries);
69	6	$encoded = $encoder($this->entries);
70
71		return <<<TEMPLATE
72		<?php return new class extends \Simply\Container\Container {
73	6	protected \$entries = $encoded;
74		};
75		TEMPLATE;
76		}
77
78		/**
79		* Loads the cache parameters for all entries.
80		* @throws ContainerException If the container contains entries that cannot be cached
81		*/
82	7	private function loadCacheParameters(): void
83		{
84	7	foreach ($this->entryCache as $id => $entry) {
85	7	$parameters = $entry->getCacheParameters();
86
87	7	if (!$this->isConstantValue($parameters)) {
88	1	throw new ContainerException("Unable to cache entry '$id', the cache parameters are not static");
89		}
90
91	6	$this->entries[$id] = [\get_class($entry), $parameters];
92		}
93	6	}
94
95		/**
96		* Tells if the given value is a static PHP value.
97		* @param mixed $value The value to test
98		* @return bool True if the value is a static PHP value, false if not
99		*/
100	7	private function isConstantValue($value): bool
101		{
102	7	if (\is_array($value)) {
103	7	foreach ($value as $item) {
104	7	if (!$this->isConstantValue($item)) {
105	7	return false;
106		}
107		}
108
109	6	return true;
110		}
111
112	7	return is_scalar($value) \|\| \is_null($value);
113		}
114
115		/**
116		* Adds an entry to the container.
117		* @param string $id The identifier for the container entry
118		* @param EntryInterface $type The container entry to add
119		* @throws ContainerException If trying to add an entry to an identifier that already exists
120		*/
121	15	public function addEntry(string $id, EntryInterface $type): void
122		{
123	15	if (isset($this[$id])) {
124	1	throw new ContainerException("Entry for identifier '$id' already exists");
125		}
126
127	15	$this->entryCache[$id] = $type;
128	15	}
129
130		/**
131		* Returns value for the container entry with the given identifier.
132		* @param string $id The entry identifier to look for
133		* @return mixed The value for the entry
134		* @throws NotFoundExceptionInterface If the entry cannot be found
135		* @throws ContainerExceptionInterface If there are errors trying to load dependencies
136		*/
137	13	public function get($id)
138		{
139	13	if (array_key_exists($id, $this->valueCache)) {
140	4	return $this->valueCache[$id];
141		}
142
143	13	$entry = $this->getEntry($id);
144	12	$value = $entry->getValue($this->delegate);
145
146	12	if ($entry->isFactory()) {
147	1	$this->entryCache[$id] = $entry;
148		} else {
149	12	$this->valueCache[$id] = $value;
150		}
151
152	12	return $value;
153		}
154
155		/**
156		* Returns container entry for the given identifier.
157		* @param string $id The entry identifier to look for
158		* @return EntryInterface The container entry for the given identifier
159		* @throws NotFoundExceptionInterface If the entry cannot be found
160		* @throws ContainerException If the cached type is not a valid entry type
161		*/
162	13	private function getEntry(string $id): EntryInterface
163		{
164	13	if (isset($this->entryCache[$id])) {
165	11	return $this->entryCache[$id];
166		}
167
168	6	if (!isset($this->entries[$id])) {
169	1	throw new NotFoundException("No entry was found for the identifier '$id'");
170		}
171
172		/** @var EntryInterface $class */
173	5	[$class, $parameters] = $this->entries[$id];
174	5	return $class::createFromCacheParameters($parameters);
175		}
176
177		/**
178		* Tells if the entry with the given identifier exists in the container.
179		* @param string $id The entry identifier to look for
180		* @return bool True if an entry with the given identifier exists, false otherwise
181		*/
182	15	public function has($id): bool
183		{
184	15	return isset($this->entries[$id]) \|\| isset($this->entryCache[$id]);
185		}
186
187		/**
188		* Tells if the entry with the given identifier exists in the container.
189		* @param string $offset The entry identifier to look for
190		* @return bool True if an entry with the given identifier exists, false otherwise
191		*/
192	15	public function offsetExists($offset): bool
193		{
194	15	return $this->has($offset);
195		}
196
197		/**
198		* Returns value for the container entry with the given identifier.
199		* @param string $offset The entry identifier to look for
200		* @return mixed The value for the entry
201		* @throws NotFoundExceptionInterface If the entry cannot be found
202		* @throws ContainerExceptionInterface If there are errors trying to load dependencies
203		*/
204	1	public function offsetGet($offset)
205		{
206	1	return $this->get($offset);
207		}
208
209		/**
210		* Adds a container entry with a mixed type.
211		* @param string $offset The identifier for the container entry
212		* @param mixed $value The value for the container entry
213		* @throws ContainerException If trying to add an entry to an identifier that already exists
214		*/
215	2	public function offsetSet($offset, $value): void
216		{
217	2	$this->addEntry($offset, new MixedEntry($value));
218	2	}
219
220		/**
221		* Removes an entry from the container.
222		* @param string $offset The identifier of the container entry to remove
223		*/
224	1	public function offsetUnset($offset): void
225		{
226		unset(
227	1	$this->entries[$offset],
228	1	$this->entryCache[$offset],
229	1	$this->valueCache[$offset]
230		);
231	1	}
232		}
233

simply-framework / container

Container::get() A last analyzed 2018-10-17 10:30 UTC

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Container::get() A
last analyzed 2018-10-17 10:30 UTC