Container::isResolvable() - Code Metrics - Inspection of "Fix has() method" - yiisoft/di - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#240)

by Dmitriy

created 2021-08-09 18:52 UTC

Container::isResolvable() D

↳ Parent: Container

Complexity

Conditions	24
Paths	18

Size

Total Lines	95
Code Lines	48

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	33
CRAP Score	39.2276

Importance

Changes	9
Bugs	0	Features	0

Metric	Value
cc	24
eloc	48
c	9
b	0
f	0
nc	18
nop	1
dl	0
loc	95
ccs	33
cts	47
cp	0.702
crap	39.2276
rs	4.1666

How to fix Long Method Complexity

<?php

declare(strict_types=1);

namespace Yiisoft\Di;

use Closure;
use Psr\Container\ContainerInterface;
use ReflectionClass;
use ReflectionException;
use ReflectionNamedType;
use ReflectionUnionType;
use Yiisoft\Di\Contracts\ServiceProviderInterface;
use Yiisoft\Factory\Definition\ArrayDefinition;
use Yiisoft\Factory\Definition\DefinitionValidator;
use Yiisoft\Factory\Exception\CircularReferenceException;
use Yiisoft\Factory\Exception\InvalidConfigException;
use Yiisoft\Factory\Exception\NotFoundException;
use Yiisoft\Factory\Exception\NotInstantiableException;

use function array_key_exists;
use function array_keys;
use function class_exists;
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 array object definitions indexed by their types
     */
    private array $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 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.
     *
     * @throws InvalidConfigException
     *
     * @psalm-suppress PropertyNotSetInConstructor
     */
    public function __construct(
        array $definitions = [],
        array $providers = [],
        array $tags = [],
        bool $validate = true
    ) {
        $this->tags = $tags;
        $this->validate = $validate;
        $this->setDefaultDefinitions();
        $this->setMultiple($definitions);
        $this->addProviders($providers);
    }

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

        try {
            return $this->isResolvable($id);
        } catch (CircularReferenceException $e) {
            return false;
        }
    }

    /**
     * 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($id)
    {
        if ($id === StateResetter::class && !isset($this->definitions[$id])) {
            $resetters = [];
            foreach ($this->resetters as $serviceId => $callback) {
                if (isset($this->instances[$serviceId])) {
                    $resetters[] = $callback->bindTo($this->instances[$serviceId], get_class($this->instances[$serviceId]));
                }
            }
            return new StateResetter($resetters, $this);
        }

        if (!array_key_exists($id, $this->instances)) {
            $this->instances[$id] = $this->build($id);
        }

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

    /**
     * @param string $id class name, interface name or alias name
     *
     * @throws CircularReferenceException
     */
    private function isResolvable($id): bool
    {
        if (isset($this->definitions[$id]) || $id === StateResetter::class) {
            return true;
        }

        if (!class_exists($id)) {
            return false;
        }

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

        try {
            $reflectionClass = new ReflectionClass($id);
        } catch (ReflectionException $e) {
            return false;
        }

        if (!$reflectionClass->isInstantiable()) {
            return false;
        }

        $constructor = $reflectionClass->getConstructor();

        if ($constructor === null) {
            return true;
        }

        $isResolvable = true;
        $this->building['class_exists'][$id] = 1;

        foreach ($constructor->getParameters() as $parameter) {
            $type = $parameter->getType();

            if ($parameter->isVariadic() || $parameter->isOptional()) {
                continue;
            }

            /**
             * @var ReflectionNamedType|ReflectionUnionType|null $type
             * @psalm-suppress RedundantConditionGivenDocblockType
             * @psalm-suppress UndefinedClass
             *
             */
            if ($type === null || !$type instanceof ReflectionUnionType && $type->isBuiltin()) {
                $isResolvable = false;
                break;
            }

            // PHP 8 union type is used as type hint
            /** @psalm-suppress UndefinedClass, TypeDoesNotContainType */
            if ($type instanceof ReflectionUnionType) {
                $isUnionTypeResolvable = false;
                /** @var ReflectionNamedType $unionType */
                foreach ($type->getTypes() as $unionType) {
                    if (!$unionType->isBuiltin()) {
                        $typeName = $unionType->getName();
                        if ($typeName === 'self') {
                            continue;
                        }
                        if ($this->isResolvable($typeName)) {
                            $isUnionTypeResolvable = true;
                            break;
                        }
                    }
                }

                $isResolvable = $isUnionTypeResolvable;
                continue;
            }

            /** @var ReflectionNamedType|null $type */
            // Our parameter has a class type hint
            if ($type !== null && !$type->isBuiltin()) {
                $typeName = $type->getName();

                if ($typeName === 'self' || !$this->isResolvable($typeName)) {
                    $isResolvable = false;
                    break;
                }
            }
        }

        if ($isResolvable) {
            $this->definitions[$id] = $id;
        }
        unset($this->building['class_exists'][$id]);

        return $isResolvable;
    }

    /**
     * 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]);
        $this->definitions[$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->set(ContainerInterface::class, $this);
    }

    /**
     * @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 $id)
    {
        if (!isset($this->definitions[$id])) {
            return $this->buildPrimitive($id);
        }
        $definition = DefinitionNormalizer::normalize($this->definitions[$id], $id);
        /** @psalm-suppress RedundantPropertyInitializationCheck */
        $this->dependencyResolver ??= new DependencyResolver($this->get(ContainerInterface::class));

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

    /**
     * @param string $class
     *
     * @throws InvalidConfigException
     * @throws NotFoundException
     *
     * @return mixed|object
     */
    private function buildPrimitive(string $class)
    {
        if ($this->isResolvable($class)) {
            /** @psalm-suppress ArgumentTypeCoercion */
            $definition = ArrayDefinition::fromPreparedData($class);
            /** @psalm-suppress RedundantPropertyInitializationCheck */
            $this->dependencyResolver ??= new DependencyResolver($this->get(ContainerInterface::class));

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

        throw new NotFoundException($class);
    }

    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 => $extension) {
                if (!isset($this->definitions[$id])) {
                    throw new InvalidConfigException("Extended service \"$id\" doesn't exist.");
                }

                if (!$this->definitions[$id] instanceof ExtensibleService) {
                    $this->definitions[$id] = new ExtensibleService($this->definitions[$id]);
                }

                $this->definitions[$id]->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
    {
        if (is_object($variable)) {
            return get_class($variable);
        }

        return 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 ReflectionClass;
10		use ReflectionException;
11		use ReflectionNamedType;
12		use ReflectionUnionType;
13		use Yiisoft\Di\Contracts\ServiceProviderInterface;
14		use Yiisoft\Factory\Definition\ArrayDefinition;
15		use Yiisoft\Factory\Definition\DefinitionValidator;
16		use Yiisoft\Factory\Exception\CircularReferenceException;
17		use Yiisoft\Factory\Exception\InvalidConfigException;
18		use Yiisoft\Factory\Exception\NotFoundException;
19		use Yiisoft\Factory\Exception\NotInstantiableException;
20
21		use function array_key_exists;
22		use function array_keys;
23		use function class_exists;
24		use function get_class;
25		use function implode;
26		use function in_array;
27		use function is_array;
28		use function is_object;
29		use function is_string;
30
31		/**
32		* Container implements a [dependency injection](http://en.wikipedia.org/wiki/Dependency_injection) container.
33		*/
34		final class Container implements ContainerInterface
35		{
36		private const META_TAGS = 'tags';
37		private const META_RESET = 'reset';
38		private const ALLOWED_META = [self::META_TAGS, self::META_RESET];
39
40		/**
41		* @var array object definitions indexed by their types
42		*/
43		private array $definitions = [];
44		/**
45		* @var array used to collect ids instantiated during build
46		* to detect circular references
47		*/
48		private array $building = [];
49
50		/**
51		* @var bool $validate Validate definitions when set
52		*/
53		private bool $validate;
54
55		/**
56		* @var object[]
57		*/
58		private array $instances = [];
59
60		private array $tags;
61
62		private array $resetters = [];
63		/** @psalm-suppress PropertyNotSetInConstructor */
64		private DependencyResolver $dependencyResolver;
65
66		/**
67		* Container constructor.
68		*
69		* @param array $definitions Definitions to put into container.
70		* @param array $providers Service providers to get definitions from.
71		* lookup to when resolving dependencies. If provided the current container
72		* is no longer queried for dependencies.
73		*
74		* @throws InvalidConfigException
75		*
76		* @psalm-suppress PropertyNotSetInConstructor
77		*/
78	96	public function __construct(
79		array $definitions = [],
80		array $providers = [],
81		array $tags = [],
82		bool $validate = true
83		) {
84	96	$this->tags = $tags;
85	96	$this->validate = $validate;
86	96	$this->setDefaultDefinitions();
87	96	$this->setMultiple($definitions);
88	90	$this->addProviders($providers);
89	89	}
90
91		/**
92		* Returns a value indicating whether the container has the definition of the specified name.
93		*
94		* @param string $id class name, interface name or alias name
95		*
96		* @return bool whether the container is able to provide instance of class specified.
97		*
98		* @see set()
99		*/
100	29	public function has($id): bool
101		{
102	29	if ($this->isTagAlias($id)) {
103	2	$tag = substr($id, 4);
104	2	return isset($this->tags[$tag]);
105		}
106
107		try {
108	27	return $this->isResolvable($id);
109	1	} catch (CircularReferenceException $e) {
110	1	return false;
111		}
112		}
113
114		/**
115		* Returns an instance by either interface name or alias.
116		*
117		* Same instance of the class will be returned each time this method is called.
118		*
119		* @param string $id The interface or an alias name that was previously registered.
120		*
121		* @throws CircularReferenceException
122		* @throws InvalidConfigException
123		* @throws NotFoundException
124		* @throws NotInstantiableException
125		*
126		* @return mixed\|object An instance of the requested interface.
127		*
128		* @psalm-template T
129		* @psalm-param string\|class-string<T> $id
130		* @psalm-return ($id is class-string ? T : mixed)
131		*/
132	83	public function get($id)
133		{
134	83	if ($id === StateResetter::class && !isset($this->definitions[$id])) {
135	4	$resetters = [];
136	4	foreach ($this->resetters as $serviceId => $callback) {
137	4	if (isset($this->instances[$serviceId])) {
138	4	$resetters[] = $callback->bindTo($this->instances[$serviceId], get_class($this->instances[$serviceId]));
139		}
140		}
141	4	return new StateResetter($resetters, $this);
142		}
143
144	83	if (!array_key_exists($id, $this->instances)) {
145	83	$this->instances[$id] = $this->build($id);
146		}
147
148	79	return $this->instances[$id];
149		}
150
151		/**
152		* @param string $id class name, interface name or alias name
153		*
154		* @throws CircularReferenceException
155		*/
156	58	private function isResolvable($id): bool
157		{
158	58	if (isset($this->definitions[$id]) \|\| $id === StateResetter::class) {
159	27	return true;
160		}
161
162	55	if (!class_exists($id)) {
163	12	return false;
164		}
165
166	50	if (isset($this->building['class_exists'][$id])) {
167	3	throw new CircularReferenceException(sprintf(
168	3	'Circular reference to "%s" detected while building: %s.',
169		$id,
170	3	implode(',', array_keys($this->building['class_exists']))
171		));
172		}
173
174		try {
175	50	$reflectionClass = new ReflectionClass($id);
176		} catch (ReflectionException $e) {
177		return false;
178		}
179
180	50	if (!$reflectionClass->isInstantiable()) {
181		return false;
182		}
183
184	50	$constructor = $reflectionClass->getConstructor();
185
186	50	if ($constructor === null) {
187	5	return true;
188		}
189
190	48	$isResolvable = true;
191	48	$this->building['class_exists'][$id] = 1;
192
193	48	foreach ($constructor->getParameters() as $parameter) {
194	48	$type = $parameter->getType();
195
196	48	if ($parameter->isVariadic() \|\| $parameter->isOptional()) {
197	43	continue;
198		}
199
200		/**
201		* @var ReflectionNamedType\|ReflectionUnionType\|null $type
202		* @psalm-suppress RedundantConditionGivenDocblockType
203		* @psalm-suppress UndefinedClass
204		*
205		*/
206	18	if ($type === null \|\| !$type instanceof ReflectionUnionType && $type->isBuiltin()) {
207	4	$isResolvable = false;
208	4	break;
209		}
210
211		// PHP 8 union type is used as type hint
212		/** @psalm-suppress UndefinedClass, TypeDoesNotContainType */
213	18	if ($type instanceof ReflectionUnionType) {
214		$isUnionTypeResolvable = false;
215		/** @var ReflectionNamedType $unionType */
216		foreach ($type->getTypes() as $unionType) {
217		if (!$unionType->isBuiltin()) {
218		$typeName = $unionType->getName();
219		if ($typeName === 'self') {
220		continue;
221		}
222		if ($this->isResolvable($typeName)) {
223		$isUnionTypeResolvable = true;
224		break;
225		}
226		}
227		}
228
229		$isResolvable = $isUnionTypeResolvable;
230		continue;
231		}
232
233		/** @var ReflectionNamedType\|null $type */
234		// Our parameter has a class type hint
235	18	if ($type !== null && !$type->isBuiltin()) {
236	18	$typeName = $type->getName();
237
238	18	if ($typeName === 'self' \|\| !$this->isResolvable($typeName)) {
239	6	$isResolvable = false;
240	6	break;
241		}
242		}
243		}
244
245	45	if ($isResolvable) {
246	43	$this->definitions[$id] = $id;
247		}
248	45	unset($this->building['class_exists'][$id]);
249
250	45	return $isResolvable;
251		}
252
253		/**
254		* Sets a definition to the container. Definition may be defined multiple ways.
255		*
256		* @param string $id
257		* @param mixed $definition
258		*
259		* @throws InvalidConfigException
260		*
261		* @see `DefinitionNormalizer::normalize()`
262		*/
263	96	private function set(string $id, $definition): void
264		{
265	96	[$definition, $meta] = DefinitionParser::parse($definition);
266	96	if ($this->validate) {
267	96	$this->validateDefinition($definition, $id);
268	96	$this->validateMeta($meta);
269		}
270
271	96	if (isset($meta[self::META_TAGS])) {
272	8	if ($this->validate) {
273	8	$this->validateTags($meta[self::META_TAGS]);
274		}
275	8	$this->setTags($id, $meta[self::META_TAGS]);
276		}
277	96	if (isset($meta[self::META_RESET])) {
278	5	$this->setResetter($id, $meta[self::META_RESET]);
279		}
280
281	96	unset($this->instances[$id]);
282	96	$this->definitions[$id] = $definition;
283	96	}
284
285		/**
286		* Sets multiple definitions at once.
287		*
288		* @param array $config definitions indexed by their ids
289		*
290		* @throws InvalidConfigException
291		*/
292	96	private function setMultiple(array $config): void
293		{
294	96	foreach ($config as $id => $definition) {
295	88	if ($this->validate && !is_string($id)) {
296	1	throw new InvalidConfigException(sprintf('Key must be a string. %s given.', $this->getVariableType($id)));
297		}
298	87	$this->set($id, $definition);
299		}
300	90	}
301
302
303
304	96	private function setDefaultDefinitions(): void
305		{
306	96	$this->set(ContainerInterface::class, $this);
307	96	}
308
309		/**
310		* @param mixed $definition
311		*
312		* @throws InvalidConfigException
313		*/
314	96	private function validateDefinition($definition, ?string $id = null): void
315		{
316	96	if (is_array($definition) && isset($definition[DefinitionParser::IS_PREPARED_ARRAY_DEFINITION_DATA])) {
317	39	$class = $definition['class'];
318	39	$constructorArguments = $definition['__construct()'];
319	39	$methodsAndProperties = $definition['methodsAndProperties'];
320	39	$definition = array_merge(
321	39	$class === null ? [] : [ArrayDefinition::CLASS_NAME => $class],
322	39	[ArrayDefinition::CONSTRUCTOR => $constructorArguments],
323		$methodsAndProperties,
324		);
325		}
326
327	96	if ($definition instanceof ExtensibleService) {
328		throw new InvalidConfigException('Invalid definition. ExtensibleService is only allowed in provider extensions.');
329		}
330
331	96	DefinitionValidator::validate($definition, $id);
332	96	}
333
334		/**
335		* @throws InvalidConfigException
336		*/
337	96	private function validateMeta(array $meta): void
338		{
339	96	foreach ($meta as $key => $_value) {
340	16	if (!in_array($key, self::ALLOWED_META, true)) {
341	3	throw new InvalidConfigException(
342	3	sprintf(
343	3	'Invalid definition: metadata "%s" is not allowed. Did you mean "%s()" or "$%s"?',
344		$key,
345		$key,
346		$key,
347		)
348		);
349		}
350		}
351	96	}
352
353	8	private function validateTags(array $tags): void
354		{
355	8	foreach ($tags as $tag) {
356	8	if (!is_string($tag)) {
357		throw new InvalidConfigException('Invalid tag. Expected a string, got ' . var_export($tag, true) . '.');
358		}
359		}
360	8	}
361
362	8	private function setTags(string $id, array $tags): void
363		{
364	8	foreach ($tags as $tag) {
365	8	if (!isset($this->tags[$tag]) \|\| !in_array($id, $this->tags[$tag], true)) {
366	8	$this->tags[$tag][] = $id;
367		}
368		}
369	8	}
370
371	4	private function setResetter(string $id, Closure $resetter): void
372		{
373	4	$this->resetters[$id] = $resetter;
374	4	}
375
376		/**
377		* Creates new instance by either interface name or alias.
378		*
379		* @param string $id The interface or an alias name that was previously registered.
380		*
381		* @throws CircularReferenceException
382		* @throws InvalidConfigException
383		* @throws NotFoundException
384		*
385		* @return mixed\|object New built instance of the specified class.
386		*
387		* @internal
388		*/
389	83	private function build(string $id)
390		{
391	83	if ($this->isTagAlias($id)) {
392	9	return $this->getTaggedServices($id);
393		}
394
395	82	if (isset($this->building[$id])) {
396	78	if ($id === ContainerInterface::class) {
397	78	return $this;
398		}
399	4	throw new CircularReferenceException(sprintf(
400	4	'Circular reference to "%s" detected while building: %s.',
401		$id,
402	4	implode(',', array_keys($this->building))
403		));
404		}
405
406	82	$this->building[$id] = 1;
407		try {
408	82	$object = $this->buildInternal($id);
409	78	} finally {
410	82	unset($this->building[$id]);
411		}
412
413	78	return $object;
414		}
415
416	89	private function isTagAlias(string $id): bool
417		{
418	89	return strpos($id, 'tag@') === 0;
419		}
420
421	9	private function getTaggedServices(string $tagAlias): array
422		{
423	9	$tag = substr($tagAlias, 4);
424	9	$services = [];
425	9	if (isset($this->tags[$tag])) {
426	8	foreach ($this->tags[$tag] as $service) {
427	8	$services[] = $this->get($service);
428		}
429		}
430
431	9	return $services;
432		}
433
434		/**
435		* @param string $id
436		*
437		* @throws InvalidConfigException
438		* @throws NotFoundException
439		*
440		* @return mixed\|object
441		*/
442	82	private function buildInternal(string $id)
443		{
444	82	if (!isset($this->definitions[$id])) {
445	46	return $this->buildPrimitive($id);
446		}
447	78	$definition = DefinitionNormalizer::normalize($this->definitions[$id], $id);
448		/** @psalm-suppress RedundantPropertyInitializationCheck */
449	78	$this->dependencyResolver ??= new DependencyResolver($this->get(ContainerInterface::class));
450
451	78	return $definition->resolve($this->dependencyResolver);
452		}
453
454		/**
455		* @param string $class
456		*
457		* @throws InvalidConfigException
458		* @throws NotFoundException
459		*
460		* @return mixed\|object
461		*/
462	46	private function buildPrimitive(string $class)
463		{
464	46	if ($this->isResolvable($class)) {
465		/** @psalm-suppress ArgumentTypeCoercion */
466	41	$definition = ArrayDefinition::fromPreparedData($class);
467		/** @psalm-suppress RedundantPropertyInitializationCheck */
468	41	$this->dependencyResolver ??= new DependencyResolver($this->get(ContainerInterface::class));
469
470	41	return $definition->resolve($this->dependencyResolver);
471		}
472
473	3	throw new NotFoundException($class);
474		}
475
476	90	private function addProviders(array $providers): void
477		{
478	90	$extensions = [];
479	90	foreach ($providers as $provider) {
480	5	$providerInstance = $this->buildProvider($provider);
481	5	$extensions[] = $providerInstance->getExtensions();
482	5	$this->addProviderDefinitions($providerInstance);
483		}
484
485	90	foreach ($extensions as $providerExtensions) {
486	5	foreach ($providerExtensions as $id => $extension) {
487	4	if (!isset($this->definitions[$id])) {
488	1	throw new InvalidConfigException("Extended service \"$id\" doesn't exist.");
489		}
490
491	3	if (!$this->definitions[$id] instanceof ExtensibleService) {
492	3	$this->definitions[$id] = new ExtensibleService($this->definitions[$id]);
493		}
494
495	3	$this->definitions[$id]->addExtension($extension);
496		}
497		}
498	89	}
499
500		/**
501		* Adds service provider definitions to the container.
502		*
503		* @param object $provider
504		*
505		* @throws InvalidConfigException
506		* @throws NotInstantiableException
507		*
508		* @see ServiceProviderInterface
509		*/
510	5	private function addProviderDefinitions($provider): void
511		{
512	5	$definitions = $provider->getDefinitions();
513	5	$this->setMultiple($definitions);
514	5	}
515
516		/**
517		* Builds service provider by definition.
518		*
519		* @param mixed $provider Class name or instance of provider.
520		*
521		* @throws InvalidConfigException If provider argument is not valid.
522		*
523		* @return ServiceProviderInterface Instance of service provider.
524		*
525		* @psalm-suppress MoreSpecificReturnType
526		*/
527	5	private function buildProvider($provider): ServiceProviderInterface
528		{
529	5	if ($this->validate && !(is_string($provider) \|\| is_object($provider) && $provider instanceof ServiceProviderInterface)) {
530		throw new InvalidConfigException(
531		sprintf(
532		'Service provider should be a class name or an instance of %s. %s given.',
533		ServiceProviderInterface::class,
534		$this->getVariableType($provider)
535		)
536		);
537		}
538
539	5	$providerInstance = is_object($provider) ? $provider : new $provider();
540	5	if (!$providerInstance instanceof ServiceProviderInterface) {
541		throw new InvalidConfigException(
542		sprintf(
543		'Service provider should be an instance of %s. %s given.',
544		ServiceProviderInterface::class,
545		$this->getVariableType($providerInstance)
546		)
547		);
548		}
549
550		/**
551		* @psalm-suppress LessSpecificReturnStatement
552		*/
553	5	return $providerInstance;
554		}
555
556		/**
557		* @param mixed $variable
558		*/
559	1	private function getVariableType($variable): string
560		{
561	1	if (is_object($variable)) {
562		return get_class($variable);
563		}
564
565	1	return gettype($variable);
566		}
567		}
568

yiisoft / di

Pull Request — master (#240)

Container::isResolvable() D

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