Container::get() - Code Metrics - Inspection of "Refactor delegates (#250)" - yiisoft/di - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( db5893...1bb971 )

by Alexander

created 2021-08-30 20:26 UTC

Container::get() B

↳ Parent: Container

Complexity

Conditions	10
Paths	9

Size

Total Lines	33
Code Lines	18

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	16
CRAP Score	10.1371

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	10
eloc	18
c	1
b	0
f	0
nc	9
nop	1
dl	0
loc	33
ccs	16
cts	18
cp	0.8889
crap	10.1371
rs	7.6666

How to fix Complexity

<?php

declare(strict_types=1);

namespace Yiisoft\Di;

use Closure;
use Psr\Container\ContainerInterface;
use Yiisoft\Definitions\Infrastructure\DefinitionValidator;
use Yiisoft\Di\Contracts\ServiceProviderInterface;
use Yiisoft\Definitions\ArrayDefinition;
use Yiisoft\Definitions\Exception\CircularReferenceException;
use Yiisoft\Definitions\Exception\InvalidConfigException;
use Yiisoft\Definitions\Exception\NotFoundException;
use Yiisoft\Definitions\Exception\NotInstantiableException;

use function array_key_exists;
use function array_keys;
use function get_class;
use function implode;
use function in_array;
use function is_array;
use function is_object;
use function is_string;

/**
 * Container implements a [dependency injection](http://en.wikipedia.org/wiki/Dependency_injection) container.
 */
final class Container implements ContainerInterface
{
    private const META_TAGS = 'tags';
    private const META_RESET = 'reset';
    private const ALLOWED_META = [self::META_TAGS, self::META_RESET];

    /**
     * @var DefinitionStorage storage of object definitions
     */
    private DefinitionStorage $definitions;
    /**
     * @var array used to collect ids instantiated during build
     * to detect circular references
     */
    private array $building = [];

    /**
     * @var bool $validate Validate definitions when set
     */
    private bool $validate;

    /**
     * @var object[]
     */
    private array $instances = [];

    private CompositeContainer $delegates;

    private array $tags;

    private array $resetters = [];
    /** @psalm-suppress PropertyNotSetInConstructor */
    private DependencyResolver $dependencyResolver;

    /**
     * Container constructor.
     *
     * @param array $definitions Definitions to put into container.
     * @param array $providers Service providers to get definitions from.
     * lookup to when resolving dependencies. If provided the current container
     * is no longer queried for dependencies.
     * @param array $tags
     * @param bool $validate If definitions should be validated immediately.
     * @param array $delegates Container delegates. Each delegate must is a callable in format
     * "function (ContainerInterface $container): ContainerInterface". The container instance returned is used
     * in case a service can not be found in primary container.
     *
     * @throws InvalidConfigException
     *
     * @psalm-suppress PropertyNotSetInConstructor
     */
    public function __construct(
        array $definitions = [],
        array $providers = [],
        array $tags = [],
        bool $validate = true,
        array $delegates = []
    ) {
        $this->tags = $tags;
        $this->validate = $validate;
        $this->definitions = new DefinitionStorage();
        $this->setDefaultDefinitions();
        $this->setMultiple($definitions);
        $this->addProviders($providers);
        $this->dependencyResolver = new DependencyResolver($this);
        $this->dependencyResolver = new DependencyResolver($this->get(ContainerInterface::class));
        $this->setDelegates($delegates);
    }

    /**
     * Returns a value indicating whether the container has the definition of the specified name.
     *
     * @param string $id class name, interface name or alias name
     *
     * @return bool whether the container is able to provide instance of class specified.
     *
     * @see set()
     */
    public function has($id): bool
    {
        /** @psalm-suppress  DocblockTypeContradiction */
        if (!is_string($id)) {

            return false;
        }

        if ($this->isTagAlias($id)) {
            $tag = substr($id, 4);
            return isset($this->tags[$tag]);
        }

        try {
            return $this->definitions->has($id);
        } catch (CircularReferenceException $e) {
            return true;
        }
    }

    /**
     * Returns an instance by either interface name or alias.
     *
     * Same instance of the class will be returned each time this method is called.
     *
     * @param string $id The interface or an alias name that was previously registered.
     *
     * @throws CircularReferenceException
     * @throws InvalidConfigException
     * @throws NotFoundException
     * @throws NotInstantiableException
     *
     * @return mixed|object An instance of the requested interface.
     *
     * @psalm-template T
     * @psalm-param string|class-string<T> $id
     * @psalm-return ($id is class-string ? T : mixed)
     */
    public function get($id)
    {
        /** @psalm-suppress TypeDoesNotContainType */
        if (!is_string($id)) {

            throw new \InvalidArgumentException("Id must be a string, {$this->getVariableType($id)} given.");
        }

        if (!array_key_exists($id, $this->instances)) {
            try {
                $this->instances[$id] = $this->build($id);
            } catch (NotFoundException $e) {
                if (!$this->delegates->has($id)) {
                    throw $e;
                }

                return $this->delegates->get($id);
            }
        }

        if ($id === StateResetter::class && $this->definitions->get($id) === StateResetter::class) {
            $resetters = [];
            foreach ($this->resetters as $serviceId => $callback) {
                if (isset($this->instances[$serviceId])) {
                    $resetters[$serviceId] = $callback;
                }
            }
            if ($this->delegates->has(StateResetter::class)) {
                $resetters[] = $this->delegates->get(StateResetter::class);
            }
            $this->instances[$id]->setResetters($resetters);
        }

        return $this->instances[$id];
    }

    /**
     * Sets a definition to the container. Definition may be defined multiple ways.
     *
     * @param string $id
     * @param mixed $definition
     *
     * @throws InvalidConfigException
     *
     * @see `DefinitionNormalizer::normalize()`
     */
    private function set(string $id, $definition): void
    {
        [$definition, $meta] = DefinitionParser::parse($definition);
        if ($this->validate) {
            $this->validateDefinition($definition, $id);
            $this->validateMeta($meta);
        }

        if (isset($meta[self::META_TAGS])) {
            if ($this->validate) {
                $this->validateTags($meta[self::META_TAGS]);
            }
            $this->setTags($id, $meta[self::META_TAGS]);
        }
        if (isset($meta[self::META_RESET])) {
            $this->setResetter($id, $meta[self::META_RESET]);
        }

        unset($this->instances[$id]);
        $this->definitions->set($id, $definition);
    }

    /**
     * Sets multiple definitions at once.
     *
     * @param array $config definitions indexed by their ids
     *
     * @throws InvalidConfigException
     */
    private function setMultiple(array $config): void
    {
        foreach ($config as $id => $definition) {
            if ($this->validate && !is_string($id)) {
                throw new InvalidConfigException(sprintf('Key must be a string. %s given.', $this->getVariableType($id)));
            }
            $this->set($id, $definition);
        }
    }

    private function setDefaultDefinitions(): void
    {
        $this->setMultiple([
            ContainerInterface::class => $this,
            StateResetter::class => StateResetter::class,
        ]);
    }

    /**
     * Set container delegates.
     *
     * Each delegate must is a callable in format "function (ContainerInterface $container): ContainerInterface".
     * The container instance returned is used in case a service can not be found in primary container.
     *
     * @param array $delegates
     *
     * @throws InvalidConfigException
     */
    private function setDelegates(array $delegates): void
    {
        $this->delegates = new CompositeContainer();
        foreach ($delegates as $delegate) {
            if (!$delegate instanceof Closure) {
                throw new InvalidConfigException(
                    'Delegate must be callable in format "function (ContainerInterface $container): ContainerInterface".'
                );
            }

            $delegate = $delegate($this);

            if (!$delegate instanceof ContainerInterface) {
                throw new InvalidConfigException(
                    'Delegate callable must return an object that implements ContainerInterface.'
                );
            }

            $this->delegates->attach($delegate);
        }
        $this->definitions->setDelegateContainer($this->delegates);
    }

    /**
     * @param mixed $definition
     *
     * @throws InvalidConfigException
     */
    private function validateDefinition($definition, ?string $id = null): void
    {
        if (is_array($definition) && isset($definition[DefinitionParser::IS_PREPARED_ARRAY_DEFINITION_DATA])) {
            $class = $definition['class'];
            $constructorArguments = $definition['__construct()'];
            $methodsAndProperties = $definition['methodsAndProperties'];
            $definition = array_merge(
                $class === null ? [] : [ArrayDefinition::CLASS_NAME => $class],
                [ArrayDefinition::CONSTRUCTOR => $constructorArguments],
                $methodsAndProperties,
            );
        }

        if ($definition instanceof ExtensibleService) {
            throw new InvalidConfigException('Invalid definition. ExtensibleService is only allowed in provider extensions.');
        }

        DefinitionValidator::validate($definition, $id);
    }

    /**
     * @throws InvalidConfigException
     */
    private function validateMeta(array $meta): void
    {
        foreach ($meta as $key => $_value) {
            if (!in_array($key, self::ALLOWED_META, true)) {
                throw new InvalidConfigException(
                    sprintf(
                        'Invalid definition: metadata "%s" is not allowed. Did you mean "%s()" or "$%s"?',
                        $key,
                        $key,
                        $key,
                    )
                );
            }
        }
    }

    private function validateTags(array $tags): void
    {
        foreach ($tags as $tag) {
            if (!is_string($tag)) {
                throw new InvalidConfigException('Invalid tag. Expected a string, got ' . var_export($tag, true) . '.');
            }
        }
    }

    private function setTags(string $id, array $tags): void
    {
        foreach ($tags as $tag) {
            if (!isset($this->tags[$tag]) || !in_array($id, $this->tags[$tag], true)) {
                $this->tags[$tag][] = $id;
            }
        }
    }

    private function setResetter(string $id, Closure $resetter): void
    {
        $this->resetters[$id] = $resetter;
    }

    /**
     * Creates new instance by either interface name or alias.
     *
     * @param string $id The interface or an alias name that was previously registered.
     *
     * @throws CircularReferenceException
     * @throws InvalidConfigException
     * @throws NotFoundException
     *
     * @return mixed|object New built instance of the specified class.
     *
     * @internal
     */
    private function build(string $id)
    {
        if ($this->isTagAlias($id)) {
            return $this->getTaggedServices($id);
        }

        if (isset($this->building[$id])) {
            if ($id === ContainerInterface::class) {
                return $this;
            }
            throw new CircularReferenceException(sprintf(
                'Circular reference to "%s" detected while building: %s.',
                $id,
                implode(', ', array_keys($this->building))
            ));
        }

        $this->building[$id] = 1;
        try {
            $object = $this->buildInternal($id);
        } finally {
            unset($this->building[$id]);
        }

        return $object;
    }

    private function isTagAlias(string $id): bool
    {
        return strpos($id, 'tag@') === 0;
    }

    private function getTaggedServices(string $tagAlias): array
    {
        $tag = substr($tagAlias, 4);
        $services = [];
        if (isset($this->tags[$tag])) {
            foreach ($this->tags[$tag] as $service) {
                $services[] = $this->get($service);
            }
        }

        return $services;
    }

    /**
     * @param string $id
     *
     * @throws InvalidConfigException
     * @throws NotFoundException
     *
     * @return mixed|object
     */
    private function buildInternal(string $id)
    {
        if ($this->definitions->has($id)) {
            $definition = DefinitionNormalizer::normalize($this->definitions->get($id), $id);

            return $definition->resolve($this->dependencyResolver);
        }

        throw new NotFoundException($id, $this->definitions->getBuildStack());
    }

    private function addProviders(array $providers): void
    {
        $extensions = [];
        foreach ($providers as $provider) {
            $providerInstance = $this->buildProvider($provider);
            $extensions[] = $providerInstance->getExtensions();
            $this->addProviderDefinitions($providerInstance);
        }

        foreach ($extensions as $providerExtensions) {
            foreach ($providerExtensions as $id => $extension) {
                if (!$this->definitions->has($id)) {
                    throw new InvalidConfigException("Extended service \"$id\" doesn't exist.");
                }

                $definition = $this->definitions->get($id);
                if (!$definition instanceof ExtensibleService) {
                    $definition = new ExtensibleService($definition);
                    $this->definitions->set($id, $definition);
                }

                $definition->addExtension($extension);
            }
        }
    }

    /**
     * Adds service provider definitions to the container.
     *
     * @param object $provider
     *
     * @throws InvalidConfigException
     * @throws NotInstantiableException
     *
     * @see ServiceProviderInterface
     */
    private function addProviderDefinitions($provider): void
    {
        $definitions = $provider->getDefinitions();
        $this->setMultiple($definitions);
    }

    /**
     * Builds service provider by definition.
     *
     * @param mixed $provider Class name or instance of provider.
     *
     * @throws InvalidConfigException If provider argument is not valid.
     *
     * @return ServiceProviderInterface Instance of service provider.
     *
     * @psalm-suppress MoreSpecificReturnType
     */
    private function buildProvider($provider): ServiceProviderInterface
    {
        if ($this->validate && !(is_string($provider) || is_object($provider) && $provider instanceof ServiceProviderInterface)) {
            throw new InvalidConfigException(
                sprintf(
                    'Service provider should be a class name or an instance of %s. %s given.',
                    ServiceProviderInterface::class,
                    $this->getVariableType($provider)
                )
            );
        }

        $providerInstance = is_object($provider) ? $provider : new $provider();
        if (!$providerInstance instanceof ServiceProviderInterface) {
            throw new InvalidConfigException(
                sprintf(
                    'Service provider should be an instance of %s. %s given.',
                    ServiceProviderInterface::class,
                    $this->getVariableType($providerInstance)
                )
            );
        }

        /**
         * @psalm-suppress LessSpecificReturnStatement
         */
        return $providerInstance;
    }

    /**
     * @param mixed $variable
     */
    private function getVariableType($variable): string
    {
        return is_object($variable) ? get_class($variable) : gettype($variable);
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Yiisoft\Di;
6
7		use Closure;
8		use Psr\Container\ContainerInterface;
9		use Yiisoft\Definitions\Infrastructure\DefinitionValidator;
10		use Yiisoft\Di\Contracts\ServiceProviderInterface;
11		use Yiisoft\Definitions\ArrayDefinition;
12		use Yiisoft\Definitions\Exception\CircularReferenceException;
13		use Yiisoft\Definitions\Exception\InvalidConfigException;
14		use Yiisoft\Definitions\Exception\NotFoundException;
15		use Yiisoft\Definitions\Exception\NotInstantiableException;
16
17		use function array_key_exists;
18		use function array_keys;
19		use function get_class;
20		use function implode;
21		use function in_array;
22		use function is_array;
23		use function is_object;
24		use function is_string;
25
26		/**
27		* Container implements a [dependency injection](http://en.wikipedia.org/wiki/Dependency_injection) container.
28		*/
29		final class Container implements ContainerInterface
30		{
31		private const META_TAGS = 'tags';
32		private const META_RESET = 'reset';
33		private const ALLOWED_META = [self::META_TAGS, self::META_RESET];
34
35		/**
36		* @var DefinitionStorage storage of object definitions
37		*/
38		private DefinitionStorage $definitions;
39		/**
40		* @var array used to collect ids instantiated during build
41		* to detect circular references
42		*/
43		private array $building = [];
44
45		/**
46		* @var bool $validate Validate definitions when set
47		*/
48		private bool $validate;
49
50		/**
51		* @var object[]
52		*/
53		private array $instances = [];
54
55		private CompositeContainer $delegates;
56
57		private array $tags;
58
59		private array $resetters = [];
60		/** @psalm-suppress PropertyNotSetInConstructor */
61		private DependencyResolver $dependencyResolver;
62
63		/**
64		* Container constructor.
65		*
66		* @param array $definitions Definitions to put into container.
67		* @param array $providers Service providers to get definitions from.
68		* lookup to when resolving dependencies. If provided the current container
69		* is no longer queried for dependencies.
70		* @param array $tags
71		* @param bool $validate If definitions should be validated immediately.
72		* @param array $delegates Container delegates. Each delegate must is a callable in format
73		* "function (ContainerInterface $container): ContainerInterface". The container instance returned is used
74		* in case a service can not be found in primary container.
75		*
76		* @throws InvalidConfigException
77		*
78		* @psalm-suppress PropertyNotSetInConstructor
79		*/
80	94	public function __construct(
81		array $definitions = [],
82		array $providers = [],
83		array $tags = [],
84		bool $validate = true,
85		array $delegates = []
86		) {
87	94	$this->tags = $tags;
88	94	$this->validate = $validate;
89	94	$this->definitions = new DefinitionStorage();
90	94	$this->setDefaultDefinitions();
91	94	$this->setMultiple($definitions);
92	88	$this->addProviders($providers);
93	87	$this->dependencyResolver = new DependencyResolver($this);
94	87	$this->dependencyResolver = new DependencyResolver($this->get(ContainerInterface::class));
95	87	$this->setDelegates($delegates);
96	87	}
97
98		/**
99		* Returns a value indicating whether the container has the definition of the specified name.
100		*
101		* @param string $id class name, interface name or alias name
102		*
103		* @return bool whether the container is able to provide instance of class specified.
104		*
105		* @see set()
106		*/
107	26	public function has($id): bool
108		{
109		/** @psalm-suppress DocblockTypeContradiction */
110	26	if (!is_string($id)) {
		0 ignored issues – show introduced 2021-08-10 08:46 UTC by Report Bug Copy Issue Report The condition `is_string($id)` is always `true`. Loading history...
111		return false;
112		}
113
114	26	if ($this->isTagAlias($id)) {
115	2	$tag = substr($id, 4);
116	2	return isset($this->tags[$tag]);
117		}
118
119		try {
120	24	return $this->definitions->has($id);
121	2	} catch (CircularReferenceException $e) {
122	2	return true;
123		}
124		}
125
126		/**
127		* Returns an instance by either interface name or alias.
128		*
129		* Same instance of the class will be returned each time this method is called.
130		*
131		* @param string $id The interface or an alias name that was previously registered.
132		*
133		* @throws CircularReferenceException
134		* @throws InvalidConfigException
135		* @throws NotFoundException
136		* @throws NotInstantiableException
137		*
138		* @return mixed\|object An instance of the requested interface.
139		*
140		* @psalm-template T
141		* @psalm-param string\|class-string<T> $id
142		* @psalm-return ($id is class-string ? T : mixed)
143		*/
144	87	public function get($id)
145		{
146		/** @psalm-suppress TypeDoesNotContainType */
147	87	if (!is_string($id)) {
		0 ignored issues – show introduced 2021-08-10 08:46 UTC by Report Bug Copy Issue Report The condition `is_string($id)` is always `true`. Loading history...
148		throw new \InvalidArgumentException("Id must be a string, {$this->getVariableType($id)} given.");
149		}
150
151	87	if (!array_key_exists($id, $this->instances)) {
152		try {
153	87	$this->instances[$id] = $this->build($id);
154	14	} catch (NotFoundException $e) {
155	5	if (!$this->delegates->has($id)) {
156	4	throw $e;
157		}
158
159	1	return $this->delegates->get($id);
160		}
161		}
162
163	87	if ($id === StateResetter::class && $this->definitions->get($id) === StateResetter::class) {
164	4	$resetters = [];
165	4	foreach ($this->resetters as $serviceId => $callback) {
166	4	if (isset($this->instances[$serviceId])) {
167	4	$resetters[$serviceId] = $callback;
168		}
169		}
170	4	if ($this->delegates->has(StateResetter::class)) {
171		$resetters[] = $this->delegates->get(StateResetter::class);
172		}
173	4	$this->instances[$id]->setResetters($resetters);
174		}
175
176	87	return $this->instances[$id];
177		}
178
179		/**
180		* Sets a definition to the container. Definition may be defined multiple ways.
181		*
182		* @param string $id
183		* @param mixed $definition
184		*
185		* @throws InvalidConfigException
186		*
187		* @see `DefinitionNormalizer::normalize()`
188		*/
189	94	private function set(string $id, $definition): void
190		{
191	94	[$definition, $meta] = DefinitionParser::parse($definition);
192	94	if ($this->validate) {
193	94	$this->validateDefinition($definition, $id);
194	94	$this->validateMeta($meta);
195		}
196
197	94	if (isset($meta[self::META_TAGS])) {
198	8	if ($this->validate) {
199	8	$this->validateTags($meta[self::META_TAGS]);
200		}
201	8	$this->setTags($id, $meta[self::META_TAGS]);
202		}
203	94	if (isset($meta[self::META_RESET])) {
204	5	$this->setResetter($id, $meta[self::META_RESET]);
205		}
206
207	94	unset($this->instances[$id]);
208	94	$this->definitions->set($id, $definition);
209	94	}
210
211		/**
212		* Sets multiple definitions at once.
213		*
214		* @param array $config definitions indexed by their ids
215		*
216		* @throws InvalidConfigException
217		*/
218	94	private function setMultiple(array $config): void
219		{
220	94	foreach ($config as $id => $definition) {
221	94	if ($this->validate && !is_string($id)) {
222	1	throw new InvalidConfigException(sprintf('Key must be a string. %s given.', $this->getVariableType($id)));
223		}
224	94	$this->set($id, $definition);
225		}
226	94	}
227
228	94	private function setDefaultDefinitions(): void
229		{
230	94	$this->setMultiple([
231	94	ContainerInterface::class => $this,
232		StateResetter::class => StateResetter::class,
233		]);
234	94	}
235
236		/**
237		* Set container delegates.
238		*
239		* Each delegate must is a callable in format "function (ContainerInterface $container): ContainerInterface".
240		* The container instance returned is used in case a service can not be found in primary container.
241		*
242		* @param array $delegates
243		*
244		* @throws InvalidConfigException
245		*/
246	87	private function setDelegates(array $delegates): void
247		{
248	87	$this->delegates = new CompositeContainer();
249	87	foreach ($delegates as $delegate) {
250	1	if (!$delegate instanceof Closure) {
251		throw new InvalidConfigException(
252		'Delegate must be callable in format "function (ContainerInterface $container): ContainerInterface".'
253		);
254		}
255
256	1	$delegate = $delegate($this);
257
258	1	if (!$delegate instanceof ContainerInterface) {
259		throw new InvalidConfigException(
260		'Delegate callable must return an object that implements ContainerInterface.'
261		);
262		}
263
264	1	$this->delegates->attach($delegate);
265		}
266	87	$this->definitions->setDelegateContainer($this->delegates);
267	87	}
268
269		/**
270		* @param mixed $definition
271		*
272		* @throws InvalidConfigException
273		*/
274	94	private function validateDefinition($definition, ?string $id = null): void
275		{
276	94	if (is_array($definition) && isset($definition[DefinitionParser::IS_PREPARED_ARRAY_DEFINITION_DATA])) {
277	36	$class = $definition['class'];
278	36	$constructorArguments = $definition['__construct()'];
279	36	$methodsAndProperties = $definition['methodsAndProperties'];
280	36	$definition = array_merge(
281	36	$class === null ? [] : [ArrayDefinition::CLASS_NAME => $class],
282	36	[ArrayDefinition::CONSTRUCTOR => $constructorArguments],
283		$methodsAndProperties,
284		);
285		}
286
287	94	if ($definition instanceof ExtensibleService) {
288		throw new InvalidConfigException('Invalid definition. ExtensibleService is only allowed in provider extensions.');
289		}
290
291	94	DefinitionValidator::validate($definition, $id);
292	94	}
293
294		/**
295		* @throws InvalidConfigException
296		*/
297	94	private function validateMeta(array $meta): void
298		{
299	94	foreach ($meta as $key => $_value) {
300	16	if (!in_array($key, self::ALLOWED_META, true)) {
301	3	throw new InvalidConfigException(
302	3	sprintf(
303	3	'Invalid definition: metadata "%s" is not allowed. Did you mean "%s()" or "$%s"?',
304		$key,
305		$key,
306		$key,
307		)
308		);
309		}
310		}
311	94	}
312
313	8	private function validateTags(array $tags): void
314		{
315	8	foreach ($tags as $tag) {
316	8	if (!is_string($tag)) {
317		throw new InvalidConfigException('Invalid tag. Expected a string, got ' . var_export($tag, true) . '.');
318		}
319		}
320	8	}
321
322	8	private function setTags(string $id, array $tags): void
323		{
324	8	foreach ($tags as $tag) {
325	8	if (!isset($this->tags[$tag]) \|\| !in_array($id, $this->tags[$tag], true)) {
326	8	$this->tags[$tag][] = $id;
327		}
328		}
329	8	}
330
331	4	private function setResetter(string $id, Closure $resetter): void
332		{
333	4	$this->resetters[$id] = $resetter;
334	4	}
335
336		/**
337		* Creates new instance by either interface name or alias.
338		*
339		* @param string $id The interface or an alias name that was previously registered.
340		*
341		* @throws CircularReferenceException
342		* @throws InvalidConfigException
343		* @throws NotFoundException
344		*
345		* @return mixed\|object New built instance of the specified class.
346		*
347		* @internal
348		*/
349	87	private function build(string $id)
350		{
351	87	if ($this->isTagAlias($id)) {
352	9	return $this->getTaggedServices($id);
353		}
354
355	87	if (isset($this->building[$id])) {
356	5	if ($id === ContainerInterface::class) {
357	1	return $this;
358		}
359	4	throw new CircularReferenceException(sprintf(
360	4	'Circular reference to "%s" detected while building: %s.',
361		$id,
362	4	implode(', ', array_keys($this->building))
363		));
364		}
365
366	87	$this->building[$id] = 1;
367		try {
368	87	$object = $this->buildInternal($id);
369	87	} finally {
370	87	unset($this->building[$id]);
371		}
372
373	87	return $object;
374		}
375
376	87	private function isTagAlias(string $id): bool
377		{
378	87	return strpos($id, 'tag@') === 0;
379		}
380
381	9	private function getTaggedServices(string $tagAlias): array
382		{
383	9	$tag = substr($tagAlias, 4);
384	9	$services = [];
385	9	if (isset($this->tags[$tag])) {
386	8	foreach ($this->tags[$tag] as $service) {
387	8	$services[] = $this->get($service);
388		}
389		}
390
391	9	return $services;
392		}
393
394		/**
395		* @param string $id
396		*
397		* @throws InvalidConfigException
398		* @throws NotFoundException
399		*
400		* @return mixed\|object
401		*/
402	87	private function buildInternal(string $id)
403		{
404	87	if ($this->definitions->has($id)) {
405	87	$definition = DefinitionNormalizer::normalize($this->definitions->get($id), $id);
406
407	87	return $definition->resolve($this->dependencyResolver);
408		}
409
410	5	throw new NotFoundException($id, $this->definitions->getBuildStack());
411		}
412
413	88	private function addProviders(array $providers): void
414		{
415	88	$extensions = [];
416	88	foreach ($providers as $provider) {
417	5	$providerInstance = $this->buildProvider($provider);
418	5	$extensions[] = $providerInstance->getExtensions();
419	5	$this->addProviderDefinitions($providerInstance);
420		}
421
422	88	foreach ($extensions as $providerExtensions) {
423	5	foreach ($providerExtensions as $id => $extension) {
424	4	if (!$this->definitions->has($id)) {
425	1	throw new InvalidConfigException("Extended service \"$id\" doesn't exist.");
426		}
427
428	4	$definition = $this->definitions->get($id);
429	4	if (!$definition instanceof ExtensibleService) {
430	4	$definition = new ExtensibleService($definition);
431	4	$this->definitions->set($id, $definition);
432		}
433
434	4	$definition->addExtension($extension);
435		}
436		}
437	87	}
438
439		/**
440		* Adds service provider definitions to the container.
441		*
442		* @param object $provider
443		*
444		* @throws InvalidConfigException
445		* @throws NotInstantiableException
446		*
447		* @see ServiceProviderInterface
448		*/
449	5	private function addProviderDefinitions($provider): void
450		{
451	5	$definitions = $provider->getDefinitions();
452	5	$this->setMultiple($definitions);
453	5	}
454
455		/**
456		* Builds service provider by definition.
457		*
458		* @param mixed $provider Class name or instance of provider.
459		*
460		* @throws InvalidConfigException If provider argument is not valid.
461		*
462		* @return ServiceProviderInterface Instance of service provider.
463		*
464		* @psalm-suppress MoreSpecificReturnType
465		*/
466	5	private function buildProvider($provider): ServiceProviderInterface
467		{
468	5	if ($this->validate && !(is_string($provider) \|\| is_object($provider) && $provider instanceof ServiceProviderInterface)) {
469		throw new InvalidConfigException(
470		sprintf(
471		'Service provider should be a class name or an instance of %s. %s given.',
472		ServiceProviderInterface::class,
473		$this->getVariableType($provider)
474		)
475		);
476		}
477
478	5	$providerInstance = is_object($provider) ? $provider : new $provider();
479	5	if (!$providerInstance instanceof ServiceProviderInterface) {
480		throw new InvalidConfigException(
481		sprintf(
482		'Service provider should be an instance of %s. %s given.',
483		ServiceProviderInterface::class,
484		$this->getVariableType($providerInstance)
485		)
486		);
487		}
488
489		/**
490		* @psalm-suppress LessSpecificReturnStatement
491		*/
492	5	return $providerInstance;
493		}
494
495		/**
496		* @param mixed $variable
497		*/
498	1	private function getVariableType($variable): string
499		{
500	1	return is_object($variable) ? get_class($variable) : gettype($variable);
501		}
502		}
503

yiisoft / di

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Container::get() B

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