Container::get() - Code Metrics - Inspection of "Merge branch 'release/v1.0.0'" - slickframework/di - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 95a6e8...b8af6d )

by Filipe

created 2016-12-12 01:47 UTC

Container::get() A

↳ Parent: Container

Complexity

Conditions	4
Paths	5

Size

Total Lines	19
Code Lines	11

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	12
CRAP Score	4

Importance

Changes

Metric	Value
dl	0
loc	19
ccs	12
cts	12
cp	1
rs	9.2
c	0
b	0
f	0
cc	4
eloc	11
nc	5
nop	1
crap	4

<?php

/**
 * This file is part of slick/di package
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Slick\Di;

use Interop\Container\ContainerInterface;
use Interop\Container\Exception\ContainerException;
use Slick\Di\Definition\DefinitionList;
use Slick\Di\Definition\Factory;
use Slick\Di\Definition\Scope;
use Slick\Di\Definition\Value;
use Slick\Di\Exception\InvalidArgumentException;
use Slick\Di\Exception\NotFoundException;

/**
 * Dependency injection container
 *
 * @package Slick\Di
 * @author  Filipe Silva <[email protected]>
 */
class Container implements ContainerInterface
{

    /**
     * @var DefinitionList
     */
    protected $definitions;

    /**
     * @var array
     */
    protected static $instances = [];

    /**
     * @readwrite
     * @var ContainerInterface
     */
    protected $parent;

    private static $containerKeys = [
        'Interop\Container\ContainerInterface',
        'Slick\Di\Container'
    ];

    /**
     * Initialise the container with an empty definitions list
     */
    public function __construct()
    {
        $this->definitions = new DefinitionList();
        $existingKey = reset(self::$containerKeys);
        if (array_key_exists($existingKey, static::$instances)) {
            $this->setParent(static::$instances[$existingKey]);
        }

        foreach (self::$containerKeys as $key) {
            $this->register($key, $this);
            static::$instances[$key] = $this;
        }
    }

    /**
     * Finds an entry of the container by its identifier and returns it.
     *
     * @param string $id Identifier of the entry to look for.
     *
     * @throws NotFoundException  No entry was found for this identifier.
     * @throws ContainerException Error while retrieving the entry.
     *
     * @return mixed Entry.
     */
    public function get($id)
    {
        if (!$this->has($id)) {
            throw new NotFoundException(
                "There is no entry with '{$id}' name in the ".
                "dependency container."
            );
        }

        $entry = (!$this->definitions->offsetExists($id))
            ? $this->parent->get($id)
            : $this->resolve($this->definitions[$id]);

        if (is_object($entry)) {
            $entry = $this->injectOn($entry);
        }

        return $entry;
    }

    /**
     * Returns true if the container can return an entry for the given identifier.
     * Returns false otherwise.
     *
     * @param string $id Identifier of the entry to look for.
     *
     * @return boolean
     */
    public function has($id)
    {
        if (!is_string($id)) {
            return false;
        }

        if (!$this->definitions->offsetExists($id)) {
            return $this->parentHas($id);
        }
        return true;
    }

    /**
     * Adds a definition or a value to the container
     *
     * If the $definition parameter is a scalar a Value definition is created
     * and added to the definitions list.
     *
     * If the $value is a callable a factory definition will be created
     *
     * @param string|DefinitionInterface $definition
     * @param mixed                      $value
     * @param array                      $parameters
     * @param Scope|string               $scope
     *
     * @return $this|self
     */
    public function register(
        $definition, $value = null, array $parameters = [],
        $scope = Scope::SINGLETON)
    {
        if (! $definition instanceof DefinitionInterface) {
            if (is_callable($value)) {
                $value = $this->createFactoryDefinition(
                    (string) $definition,
                    $value,
                    $parameters,
                    new Scope((string) $scope)
                );
            }

            $definition = ($value instanceof DefinitionInterface)
                ? $value->setName($definition)

                : $definition = $this->createValueDefinition(
                    (string) $definition,
                    $value
                );
        }

        $definition->setContainer($this);

        $this->definitions->append($definition);
        return $this;
    }

    /**
     * Creates the object for provided class name
     *
     * This method creates factory definition that can be retrieved from
     * the container by using it FQ class name.
     *
     * If there are satisfiable dependencies in the container the are injected.
     *
     * @param string $className  FQ class name
     * @param array  $parameters An array of constructor parameters
     * @param string $scope      The definition scope
     *
     * @return mixed
     */
    public function make(
        $className, array $parameters = [], $scope = Scope::SINGLETON)
    {
        if (!class_exists($className)) {
            throw new InvalidArgumentException(
                "DI container cannot make object. Class does not exists."
            );
        }

        if (!$this->has($className)) {
            $this->registerObject($className, $parameters, $scope);
        }

        return $this->get($className);
    }

    /**
     * Inject known dependencies on provide object
     *
     * @param object $object
     *
     * @return mixed
     */
    public function injectOn($object)
    {
        $injectedObject = $object;
        $inspector = new DependencyInspector($this, $object);
        $definition = $inspector->getDefinition();
        if ($inspector->isSatisfiable()) {
            $injectedObject = $definition->resolve();
        }
        return $injectedObject;
    }

    /**
     * Set parent container for interoperability
     *
     * @ignoreInject
     * @param ContainerInterface $container
     * @return $this
     */
    public function setParent(ContainerInterface $container)
    {
        $this->parent = $container;
        return $this;
    }

    /**
     * Creates a value definition for register
     *
     * @param string $name  The name for the definition
     * @param mixed  $value The value that the definition will resolve
     *
     * @return Value A Value definition object
     */
    private function createValueDefinition($name, $value)
    {
        return new Value(
            [
                'name' => $name,
                'value' => $value
            ]
        );
    }

    /**
     * Creates a Factory definition
     *
     * @param string   $name
     * @param callable $callback
     * @param array    $params
     * @param Scope    $scope
     *
     * @return Factory
     */
    private function createFactoryDefinition(
        $name, Callable $callback, array $params, Scope $scope)
    {
        $definition = new Factory(['name' => $name]);
        return $definition
            ->setCallable($callback, $params)
            ->setScope($scope);
    }

    /**
     * Returns the resolved object for provide definition
     *
     * @param DefinitionInterface $definition
     * @return mixed|null
     */
    private function resolve(DefinitionInterface $definition)
    {
        if ($definition->getScope() == Scope::Prototype()) {
            return $definition->resolve();
        }
        return $this->resolveSingleton($definition);
    }

    /**
     * Resolve instances and save then for singleton use
     *
     * @param DefinitionInterface $definition
     * @return mixed
     */
    private function resolveSingleton(DefinitionInterface $definition)
    {
        $key = $definition->getName();
        $hasInstance = array_key_exists($key, static::$instances);

        if (!$hasInstance) {
            static::$instances[$key] = $definition->resolve();
        }
        return static::$instances[$key];
    }

    /**
     * Creates and registers an object definition
     *
     * @param string       $name       FQ class name
     * @param array        $parameters Constructor parameters
     * @param string $scope      Definition scope
     *
     * @return $this|self
     */
    private function registerObject($name, $parameters, $scope)
    {
        $inspector = new DependencyInspector($this, $name);
        $definition = $inspector->getDefinition();
        if (!empty($parameters)) {
            $definition->setConstructArgs($parameters);
        }
        $definition->setScope(new Scope((string) $scope));
        $this->register($definition);
        return $this;
    }

    /**
     * Check if parent has provided key
     *
     * @param string $key
     * @return bool
     */
    private function parentHas($key)
    {
        if (is_null($this->parent)) {
            return false;
        }
        return $this->parent->has($key);
    }
}


1		<?php
2
3		/**
4		* This file is part of slick/di package
5		*
6		* For the full copyright and license information, please view the LICENSE
7		* file that was distributed with this source code.
8		*/
9
10		namespace Slick\Di;
11
12		use Interop\Container\ContainerInterface;
13		use Interop\Container\Exception\ContainerException;
14		use Slick\Di\Definition\DefinitionList;
15		use Slick\Di\Definition\Factory;
16		use Slick\Di\Definition\Scope;
17		use Slick\Di\Definition\Value;
18		use Slick\Di\Exception\InvalidArgumentException;
19		use Slick\Di\Exception\NotFoundException;
20
21		/**
22		* Dependency injection container
23		*
24		* @package Slick\Di
25		* @author Filipe Silva <[email protected]>
26		*/
27		class Container implements ContainerInterface
28		{
29
30		/**
31		* @var DefinitionList
32		*/
33		protected $definitions;
34
35		/**
36		* @var array
37		*/
38		protected static $instances = [];
39
40		/**
41		* @readwrite
42		* @var ContainerInterface
43		*/
44		protected $parent;
45
46		private static $containerKeys = [
47		'Interop\Container\ContainerInterface',
48		'Slick\Di\Container'
49		];
50
51		/**
52		* Initialise the container with an empty definitions list
53		*/
54	74	public function __construct()
55		{
56	74	$this->definitions = new DefinitionList();
57	74	$existingKey = reset(self::$containerKeys);
58	74	if (array_key_exists($existingKey, static::$instances)) {
59	72	$this->setParent(static::$instances[$existingKey]);
60	72	}
61
62	74	foreach (self::$containerKeys as $key) {
63	74	$this->register($key, $this);
64	74	static::$instances[$key] = $this;
65	74	}
66	74	}
67
68		/**
69		* Finds an entry of the container by its identifier and returns it.
70		*
71		* @param string $id Identifier of the entry to look for.
72		*
73		* @throws NotFoundException No entry was found for this identifier.
74		* @throws ContainerException Error while retrieving the entry.
75		*
76		* @return mixed Entry.
77		*/
78	52	public function get($id)
79		{
80	52	if (!$this->has($id)) {
81	2	throw new NotFoundException(
82	2	"There is no entry with '{$id}' name in the ".
83		"dependency container."
84	2	);
85		}
86
87	50	$entry = (!$this->definitions->offsetExists($id))
88	50	? $this->parent->get($id)
89	50	: $this->resolve($this->definitions[$id]);
90
91	50	if (is_object($entry)) {
92	46	$entry = $this->injectOn($entry);
93	46	}
94
95	50	return $entry;
96		}
97
98		/**
99		* Returns true if the container can return an entry for the given identifier.
100		* Returns false otherwise.
101		*
102		* @param string $id Identifier of the entry to look for.
103		*
104		* @return boolean
105		*/
106	56	public function has($id)
107		{
108	56	if (!is_string($id)) {
109	28	return false;
110		}
111
112	56	if (!$this->definitions->offsetExists($id)) {
113	18	return $this->parentHas($id);
114		}
115	52	return true;
116		}
117
118		/**
119		* Adds a definition or a value to the container
120		*
121		* If the $definition parameter is a scalar a Value definition is created
122		* and added to the definitions list.
123		*
124		* If the $value is a callable a factory definition will be created
125		*
126		* @param string\|DefinitionInterface $definition
127		* @param mixed $value
128		* @param array $parameters
129		* @param Scope\|string $scope
130		*
131		* @return $this\|self
132		*/
133	74	public function register(
134		$definition, $value = null, array $parameters = [],
135		$scope = Scope::SINGLETON)
136		{
137	74	if (! $definition instanceof DefinitionInterface) {
138	72	if (is_callable($value)) {
139	32	$value = $this->createFactoryDefinition(
140	32	(string) $definition,
141	32	$value,
142	32	$parameters,
143	32	new Scope((string) $scope)
144	32	);
145	32	}
146
147	72	$definition = ($value instanceof DefinitionInterface)
148	72	? $value->setName($definition)
		0 ignored issues – show Bug introduced 2015-12-15 02:34 UTC by Report Bug Copy Issue Report The method `setName()` does not seem to exist on `object<Slick\Di\DefinitionInterface>`. This check looks for calls to methods that do not seem to exist on a given type. It looks for the method on the type itself as well as in inherited classes or implemented interfaces. This is most likely a typographical error or the method has been renamed. Loading history...
149	72	: $definition = $this->createValueDefinition(
150	72	(string) $definition,
151		$value
152	72	);
153	72	}
154
155	72	$definition->setContainer($this);
156
157	72	$this->definitions->append($definition);
158	72	return $this;
159		}
160
161		/**
162		* Creates the object for provided class name
163		*
164		* This method creates factory definition that can be retrieved from
165		* the container by using it FQ class name.
166		*
167		* If there are satisfiable dependencies in the container the are injected.
168		*
169		* @param string $className FQ class name
170		* @param array $parameters An array of constructor parameters
171		* @param string $scope The definition scope
172		*
173		* @return mixed
174		*/
175	10	public function make(
176		$className, array $parameters = [], $scope = Scope::SINGLETON)
177		{
178	10	if (!class_exists($className)) {
179	2	throw new InvalidArgumentException(
180		"DI container cannot make object. Class does not exists."
181	2	);
182		}
183
184	8	if (!$this->has($className)) {
185	4	$this->registerObject($className, $parameters, $scope);
186	4	}
187
188	8	return $this->get($className);
189		}
190
191		/**
192		* Inject known dependencies on provide object
193		*
194		* @param object $object
195		*
196		* @return mixed
197		*/
198	46	public function injectOn($object)
199		{
200	46	$injectedObject = $object;
201	46	$inspector = new DependencyInspector($this, $object);
202	46	$definition = $inspector->getDefinition();
203	46	if ($inspector->isSatisfiable()) {
204	46	$injectedObject = $definition->resolve();
205	46	}
206	46	return $injectedObject;
207		}
208
209		/**
210		* Set parent container for interoperability
211		*
212		* @ignoreInject
213		* @param ContainerInterface $container
214		* @return $this
215		*/
216	70	public function setParent(ContainerInterface $container)
217		{
218	70	$this->parent = $container;
219	70	return $this;
220		}
221
222		/**
223		* Creates a value definition for register
224		*
225		* @param string $name The name for the definition
226		* @param mixed $value The value that the definition will resolve
227		*
228		* @return Value A Value definition object
229		*/
230	72	private function createValueDefinition($name, $value)
231		{
232	72	return new Value(
233		[
234	72	'name' => $name,
235		'value' => $value
236	72	]
237	72	);
238		}
239
240		/**
241		* Creates a Factory definition
242		*
243		* @param string $name
244		* @param callable $callback
245		* @param array $params
246		* @param Scope $scope
247		*
248		* @return Factory
249		*/
250	32	private function createFactoryDefinition(
251		$name, Callable $callback, array $params, Scope $scope)
252		{
253	32	$definition = new Factory(['name' => $name]);
254		return $definition
255	32	->setCallable($callback, $params)
256	32	->setScope($scope);
257		}
258
259		/**
260		* Returns the resolved object for provide definition
261		*
262		* @param DefinitionInterface $definition
263		* @return mixed\|null
264		*/
265	50	private function resolve(DefinitionInterface $definition)
266		{
267	50	if ($definition->getScope() == Scope::Prototype()) {
268	8	return $definition->resolve();
269		}
270	46	return $this->resolveSingleton($definition);
271		}
272
273		/**
274		* Resolve instances and save then for singleton use
275		*
276		* @param DefinitionInterface $definition
277		* @return mixed
278		*/
279	46	private function resolveSingleton(DefinitionInterface $definition)
280		{
281	46	$key = $definition->getName();
282	46	$hasInstance = array_key_exists($key, static::$instances);
283
284	46	if (!$hasInstance) {
285	14	static::$instances[$key] = $definition->resolve();
286	14	}
287	46	return static::$instances[$key];
288		}
289
290		/**
291		* Creates and registers an object definition
292		*
293		* @param string $name FQ class name
294		* @param array $parameters Constructor parameters
295		* @param string $scope Definition scope
296		*
297		* @return $this\|self
298		*/
299	4	private function registerObject($name, $parameters, $scope)
300		{
301	4	$inspector = new DependencyInspector($this, $name);
302	4	$definition = $inspector->getDefinition();
303	4	if (!empty($parameters)) {
304	2	$definition->setConstructArgs($parameters);
305	2	}
306	4	$definition->setScope(new Scope((string) $scope));
307	4	$this->register($definition);
308	4	return $this;
309		}
310
311		/**
312		* Check if parent has provided key
313		*
314		* @param string $key
315		* @return bool
316		*/
317	18	private function parentHas($key)
318		{
319	18	if (is_null($this->parent)) {
320	10	return false;
321		}
322	16	return $this->parent->has($key);
323		}
324		}
325

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Container::get() A

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