Factory::of() - Code Metrics - litphp/air - Measure and Improve Code Quality continuously with Scrutinizer

Factory::of() A
last analyzed 2020-05-05 15:03 UTC

↳ Parent: Factory

Complexity

Conditions	2
Paths	2

Size

Total Lines	7
Code Lines	3

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	4
CRAP Score	2.3149

Importance

Changes

Metric	Value
eloc	3
dl	0
loc	7
ccs	4
cts	7
cp	0.5714
rs	10
c	0
b	0
f	0
cc	2
nc	2
nop	1
crap	2.3149

<?php

declare(strict_types=1);

namespace Lit\Air;

use Lit\Air\Injection\InjectorInterface;
use Lit\Air\Psr\CircularDependencyException;
use Lit\Air\Psr\Container;
use Lit\Air\Psr\ContainerException;
use Psr\Container\ContainerInterface;

/**
 * Air DI Factory
 */
class Factory
{
    public const CONTAINER_KEY = self::class;
    public const INJECTOR = self::class . '::injector';
    /**
     * @var Container
     */
    protected $container;
    /**
     * @var array
     */
    protected $circularStore = [];

    public function __construct(ContainerInterface $container = null)
    {
        if ($container instanceof Container) {
            $this->container = $container;
        } elseif ($container === null) {
            $this->container = new Container();
        } else {
            $this->container = Container::wrap($container);
        }
        $this->container->set(static::CONTAINER_KEY, $this);
    }

    /**
     * Get or create a factory instance from the container
     *
     * @param ContainerInterface $container The container.
     * @return Factory
     */
    public static function of(ContainerInterface $container): self
    {
        if (!$container->has(static::CONTAINER_KEY)) {
            return new static($container);
        }

        return $container->get(static::CONTAINER_KEY);
    }

    /**
     * Create a $className instance
     *
     * @param string $className       Requested classname.
     * @param array  $extraParameters Extra parameters.
     * @return object
     * @throws \Psr\Container\ContainerExceptionInterface Failure when fetching dependency in container.
     * @throws \ReflectionException Failure during reflection process.
     */
    public function instantiate(string $className, array $extraParameters = [])
    {
        $class = new \ReflectionClass($className);
        $constructor = $class->getConstructor();

        $constructParams = $constructor

            ? $this->resolveParams($constructor->getParameters(), $className, $extraParameters)
            : [];

        $instance = $class->newInstanceArgs($constructParams);
        $this->inject($instance, $extraParameters);

        return $instance;
    }

    /**
     * Call $callback with parameters injected
     *
     * @param callable $callback The callback to be called.
     * @param array    $extra    Extra parameters.
     * @return mixed
     */
    public function invoke(callable $callback, array $extra = [])
    {
        if (is_string($callback) || $callback instanceof \Closure) {
            $method = new \ReflectionFunction($callback);
            $params = $method->getParameters();
        } else {
            if (is_object($callback)) {
                $callback = [$callback, '__invoke'];
            }
            assert(is_array($callback));
            $method = (new \ReflectionClass($callback[0]))->getMethod($callback[1]);
            $params = $method->getParameters();
        }

        if ($method->isClosure()) {
            $name = sprintf('Closure@%s:%d', $method->getFileName(), $method->getStartLine());
        } elseif ($method instanceof \ReflectionMethod) {
            $name = sprintf('%s::%s', $method->getDeclaringClass()->name, $method->name);
        } else {
            assert($method instanceof \ReflectionFunction);
            preg_match('#function\s+([\w\\\\]+)#', (string)$method, $matches);
            $name = $matches[1];
        }

        assert(is_callable($callback));
        return $callback(...$this->resolveParams($params, '!' . $name, $extra));
    }

    /**
     * Produce a $className instance.
     *
     * @param string $className Requested classname.
     * @param array  $extra     Extra parameters.
     * @param bool   $cached    Whether to save the instance if it's not defined in container.
     * @return object of $className
     * @throws \ReflectionException Failure during reflection process.
     */
    public function produce(string $className, array $extra = [], bool $cached = true)
    {
        if (!class_exists($className)) {
            throw new \RuntimeException("$className not found");
        }

        if ($this->container->has($className)) {
            return $this->container->get($className);
        }

        $instance = $this->instantiate($className, $extra);
        if ($cached) {
            $this->container->set($className, $instance);
        }

        return $instance;
    }

    /**
     * Run injectors on object. (Typically for setter injection)
     *
     * @param object $obj   The object to be injected.
     * @param array  $extra Extra parameters.
     * @return void
     * @throws \Psr\Container\ContainerExceptionInterface Failure when fetching dependency in container.
     */
    protected function inject($obj, array $extra = []): void
    {
        if (!$this->container->has(static::INJECTOR)) {
            return;
        }

        /**
         * @var InjectorInterface $injector
         */
        $injector = $this->container->get(static::INJECTOR);
        $injector->inject($this, $obj, $extra);
    }

    /**
     * Resolve a dependency item.
     * http://litphp.github.io/docs/air-di#working-on-dependencies
     *
     * @param string      $consumer  Represents who need the dependency. Often a class name.
     * @param array       $keys      Ordered array of string keys describing required dependency.
     * @param null|string $className Optional class name of the dependency.
     * @param array       $extra     Extra parameters.
     * @return mixed|object
     * @throws \Psr\Container\ContainerExceptionInterface Failure when fetching dependency in container.
     * @throws \ReflectionException Failure during reflection process.
     */
    public function resolveDependency(string $consumer, array $keys, ?string $className = null, array $extra = [])
    {
        if ($value = $this->resolveBasedOnConsumer($consumer, $keys, $extra)) {
            return $value[0];
        }

        if ($className && $this->container->has($className)) {
            return $this->container->get($className);
        }

        if ($className && class_exists($className)) {
            return $this->instantiate($className, $extra);
        }

        throw new ContainerException('failed to produce dependency for ' . $consumer);
    }

    /**
     * A subprocess of dependency resolving: try use candicate keys and consumer to find dependency.
     * http://litphp.github.io/docs/air-di#working-on-dependencies
     *
     * @param string $consumer Represents who need the dependency. Often a class name.
     * @param array  $keys     Ordered array of string keys describing the dependency.
     * @param array  $extra    Extra parameters.
     * @return array|null return single element array when success, null when fail, so null value can be handled
     * @throws \Psr\Container\ContainerExceptionInterface Failure when fetching dependency in container.
     */
    protected function resolveBasedOnConsumer(string $consumer, array $keys, array $extra = [])
    {
        if (!empty($extra) && ($value = $this->findFromArray($extra, $keys))) {
            return $value;
        }
        $current = $consumer;

        do {
            if (
                !empty($current)
                && $this->container->has("$current::")
                && ($value = $this->findFromArray($this->container->get("$current::"), $keys))
            ) {
                return $value;
            }
        } while ($current = get_parent_class($current));

        return null;
    }

    protected function findFromArray($arr, $keys)
    {
        foreach ($keys as $key) {
            if (array_key_exists($key, $arr)) {
                return [$this->container->resolveRecipe($arr[$key])];
            }
        }

        return null;
    }

    /**
     * Resolve array of ReflectionParameter into concrete values
     *
     * @param array  $params   Array of ReflectionParameter.
     * @param string $consumer Represents who need the dependency.
     * @param array  $extra    Extra parameters.
     * @return array
     */
    protected function resolveParams(array $params, string $consumer, array $extra = [])
    {
        return array_map(
            function (\ReflectionParameter $parameter) use ($consumer, $extra) {
                return $this->resolveParam($consumer, $parameter, $extra);
            },
            $params
        );
    }

    /**
     * Resolve a parameter (of callback, or constructor)
     *
     * @param string               $consumer  Represents who need the dependency.
     * @param \ReflectionParameter $parameter The ReflectionParameter.
     * @param array                $extra     Extra parameters.
     * @return mixed|object
     * @throws \Psr\Container\ContainerExceptionInterface Failure when fetching dependency in container.
     * @throws \ReflectionException Failure during reflection process.
     */
    protected function resolveParam(string $consumer, \ReflectionParameter $parameter, array $extra)
    {
        $hash = sprintf('%s#%d', $consumer, $parameter->getPosition());
        if (isset($this->circularStore[$hash])) {
            throw new CircularDependencyException(array_keys($this->circularStore));
        }

        try {
            $this->circularStore[$hash] = true;
            [$keys, $paramClassName] = Factory::parseParameter($parameter);

            return $this->resolveDependency($consumer, $keys, $paramClassName, $extra);
        } catch (CircularDependencyException $e) {
            throw $e;
        } catch (ContainerException $e) {
            if ($parameter->isOptional()) {
                return $parameter->getDefaultValue();
            }

            throw new ContainerException(
                sprintf('failed to produce constructor parameter "%s" for %s', $parameter->getName(), $consumer),
                0,
                $e
            );
        } finally {
            unset($this->circularStore[$hash]);
        }
    }

    protected static function parseParameter(\ReflectionParameter $parameter)
    {
        $paramClassName = null;
        $keys = [$parameter->name];

        $paramClass = $parameter->getClass();
        if (!empty($paramClass)) {
            $keys[] = $paramClassName = $paramClass->name;
        }

        $keys[] = $parameter->getPosition();

        return [$keys, $paramClassName];
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Lit\Air;
6
7		use Lit\Air\Injection\InjectorInterface;
8		use Lit\Air\Psr\CircularDependencyException;
9		use Lit\Air\Psr\Container;
10		use Lit\Air\Psr\ContainerException;
11		use Psr\Container\ContainerInterface;
12
13		/**
14		* Air DI Factory
15		*/
16		class Factory
17		{
18		public const CONTAINER_KEY = self::class;
19		public const INJECTOR = self::class . '::injector';
20		/**
21		* @var Container
22		*/
23		protected $container;
24		/**
25		* @var array
26		*/
27		protected $circularStore = [];
28
29	9	public function __construct(ContainerInterface $container = null)
30		{
31	9	if ($container instanceof Container) {
32	9	$this->container = $container;
33		} elseif ($container === null) {
34		$this->container = new Container();
35	16	} else {
36		$this->container = Container::wrap($container);
37	16	}
38	10	$this->container->set(static::CONTAINER_KEY, $this);
39	9	}
40
41	16	/**
42		* Get or create a factory instance from the container
43		*
44		* @param ContainerInterface $container The container.
45		* @return Factory
46		*/
47	10	public static function of(ContainerInterface $container): self
48		{
49	10	if (!$container->has(static::CONTAINER_KEY)) {
50	10	return new static($container);
51		}
52
53	3	return $container->get(static::CONTAINER_KEY);
54		}
55
56		/**
57		* Create a $className instance
58		*
59		* @param string $className Requested classname.
60	1	* @param array $extraParameters Extra parameters.
61		* @return object
62	1	* @throws \Psr\Container\ContainerExceptionInterface Failure when fetching dependency in container.
63		* @throws \ReflectionException Failure during reflection process.
64		*/
65	5	public function instantiate(string $className, array $extraParameters = [])
66		{
67	5	$class = new \ReflectionClass($className);
68	6	$constructor = $class->getConstructor();
69	1
70	6	$constructParams = $constructor
		0 ignored issues – show introduced 2019-04-07 09:47 UTC by Report Bug Copy Issue Report `$constructor` is of type `ReflectionMethod`, thus it always evaluated to `true`. Loading history...
71	3	? $this->resolveParams($constructor->getParameters(), $className, $extraParameters)
72	4	: [];
73
74	4	$instance = $class->newInstanceArgs($constructParams);
75	4	$this->inject($instance, $extraParameters);
76
77	4	return $instance;
78		}
79
80		/**
81		* Call $callback with parameters injected
82		*
83		* @param callable $callback The callback to be called.
84		* @param array $extra Extra parameters.
85		* @return mixed
86		*/
87	6	public function invoke(callable $callback, array $extra = [])
88		{
89	6	if (is_string($callback) \|\| $callback instanceof \Closure) {
90	3	$method = new \ReflectionFunction($callback);
91	3	$params = $method->getParameters();
92		} else {
93	5	if (is_object($callback)) {
94	1	$callback = [$callback, '__invoke'];
95		}
96	5	assert(is_array($callback));
97	5	$method = (new \ReflectionClass($callback[0]))->getMethod($callback[1]);
98	5	$params = $method->getParameters();
99		}
100
101	6	if ($method->isClosure()) {
102	3	$name = sprintf('Closure@%s:%d', $method->getFileName(), $method->getStartLine());
103	5	} elseif ($method instanceof \ReflectionMethod) {
104	5	$name = sprintf('%s::%s', $method->getDeclaringClass()->name, $method->name);
105		} else {
106	1	assert($method instanceof \ReflectionFunction);
107	1	preg_match('#function\s+([\w\\\\]+)#', (string)$method, $matches);
108	1	$name = $matches[1];
109		}
110
111	6	assert(is_callable($callback));
112	6	return $callback(...$this->resolveParams($params, '!' . $name, $extra));
113		}
114
115		/**
116	1	* Produce a $className instance.
117		*
118	1	* @param string $className Requested classname.
119	1	* @param array $extra Extra parameters.
120	1	* @param bool $cached Whether to save the instance if it's not defined in container.
121	1	* @return object of $className
122	1	* @throws \ReflectionException Failure during reflection process.
123	1	*/
124	4	public function produce(string $className, array $extra = [], bool $cached = true)
125	1	{
126	4	if (!class_exists($className)) {
127	1	throw new \RuntimeException("$className not found");
128	1	}
129	1
130	4	if ($this->container->has($className)) {
131		return $this->container->get($className);
132	1	}
133
134	4	$instance = $this->instantiate($className, $extra);
135	3	if ($cached) {
136	4	$this->container->set($className, $instance);
137	1	}
138
139	3	return $instance;
140		}
141
142		/**
143		* Run injectors on object. (Typically for setter injection)
144		*
145		* @param object $obj The object to be injected.
146		* @param array $extra Extra parameters.
147		* @return void
148		* @throws \Psr\Container\ContainerExceptionInterface Failure when fetching dependency in container.
149		*/
150	4	protected function inject($obj, array $extra = []): void
151		{
152	4	if (!$this->container->has(static::INJECTOR)) {
153	4	return;
154		}
155
156		/**
157		* @var InjectorInterface $injector
158		*/
159	1	$injector = $this->container->get(static::INJECTOR);
160	1	$injector->inject($this, $obj, $extra);
161	1	}
162
163		/**
164		* Resolve a dependency item.
165		* http://litphp.github.io/docs/air-di#working-on-dependencies
166		*
167		* @param string $consumer Represents who need the dependency. Often a class name.
168		* @param array $keys Ordered array of string keys describing required dependency.
169		* @param null\|string $className Optional class name of the dependency.
170		* @param array $extra Extra parameters.
171		* @return mixed\|object
172		* @throws \Psr\Container\ContainerExceptionInterface Failure when fetching dependency in container.
173		* @throws \ReflectionException Failure during reflection process.
174		*/
175	5	public function resolveDependency(string $consumer, array $keys, ?string $className = null, array $extra = [])
176		{
177	5	if ($value = $this->resolveBasedOnConsumer($consumer, $keys, $extra)) {
178	3	return $value[0];
179		}
180
181	5	if ($className && $this->container->has($className)) {
182	3	return $this->container->get($className);
183		}
184
185	3	if ($className && class_exists($className)) {
186	1	return $this->instantiate($className, $extra);
187		}
188
189	3	throw new ContainerException('failed to produce dependency for ' . $consumer);
190		}
191
192		/**
193		* A subprocess of dependency resolving: try use candicate keys and consumer to find dependency.
194		* http://litphp.github.io/docs/air-di#working-on-dependencies
195		*
196		* @param string $consumer Represents who need the dependency. Often a class name.
197		* @param array $keys Ordered array of string keys describing the dependency.
198		* @param array $extra Extra parameters.
199		* @return array\|null return single element array when success, null when fail, so null value can be handled
200		* @throws \Psr\Container\ContainerExceptionInterface Failure when fetching dependency in container.
201		*/
202	5	protected function resolveBasedOnConsumer(string $consumer, array $keys, array $extra = [])
203		{
204	5	if (!empty($extra) && ($value = $this->findFromArray($extra, $keys))) {
205	3	return $value;
206		}
207	5	$current = $consumer;
208
209		do {
210		if (
211	5	!empty($current)
212	5	&& $this->container->has("$current::")
213	5	&& ($value = $this->findFromArray($this->container->get("$current::"), $keys))
214		) {
215	2	return $value;
216		}
217	5	} while ($current = get_parent_class($current));
218
219	5	return null;
220		}
221
222	4	protected function findFromArray($arr, $keys)
223		{
224	4	foreach ($keys as $key) {
225	4	if (array_key_exists($key, $arr)) {
226	4	return [$this->container->resolveRecipe($arr[$key])];
227		}
228		}
229
230	2	return null;
231		}
232
233		/**
234		* Resolve array of ReflectionParameter into concrete values
235		*
236		* @param array $params Array of ReflectionParameter.
237		* @param string $consumer Represents who need the dependency.
238		* @param array $extra Extra parameters.
239		* @return array
240		*/
241	8	protected function resolveParams(array $params, string $consumer, array $extra = [])
242		{
243	8	return array_map(
244		function (\ReflectionParameter $parameter) use ($consumer, $extra) {
245	5	return $this->resolveParam($consumer, $parameter, $extra);
246	8	},
247	8	$params
248		);
249		}
250
251		/**
252		* Resolve a parameter (of callback, or constructor)
253		*
254		* @param string $consumer Represents who need the dependency.
255		* @param \ReflectionParameter $parameter The ReflectionParameter.
256		* @param array $extra Extra parameters.
257		* @return mixed\|object
258		* @throws \Psr\Container\ContainerExceptionInterface Failure when fetching dependency in container.
259		* @throws \ReflectionException Failure during reflection process.
260		*/
261	5	protected function resolveParam(string $consumer, \ReflectionParameter $parameter, array $extra)
262		{
263	5	$hash = sprintf('%s#%d', $consumer, $parameter->getPosition());
264	5	if (isset($this->circularStore[$hash])) {
265	1	throw new CircularDependencyException(array_keys($this->circularStore));
266		}
267
268		try {
269	5	$this->circularStore[$hash] = true;
270	5	[$keys, $paramClassName] = Factory::parseParameter($parameter);
271
272	5	return $this->resolveDependency($consumer, $keys, $paramClassName, $extra);
273	4	} catch (CircularDependencyException $e) {
274	1	throw $e;
275	3	} catch (ContainerException $e) {
276	3	if ($parameter->isOptional()) {
277	3	return $parameter->getDefaultValue();
278		}
279
280	1	throw new ContainerException(
281	1	sprintf('failed to produce constructor parameter "%s" for %s', $parameter->getName(), $consumer),
282	1	0,
283	1	$e
284		);
285		} finally {
286	5	unset($this->circularStore[$hash]);
287		}
288		}
289
290	5	protected static function parseParameter(\ReflectionParameter $parameter)
291		{
292	5	$paramClassName = null;
293	5	$keys = [$parameter->name];
294
295	5	$paramClass = $parameter->getClass();
296	5	if (!empty($paramClass)) {
297	5	$keys[] = $paramClassName = $paramClass->name;
298		}
299
300	5	$keys[] = $parameter->getPosition();
301
302	5	return [$keys, $paramClassName];
303		}
304		}
305

litphp / air

Factory::of() A last analyzed 2020-05-05 15:03 UTC

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Factory::of() A
last analyzed 2020-05-05 15:03 UTC