Factory::create() - Code Metrics - Inspection of "Improve logic of object creation and dependency re..." - yiisoft/factory - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#151)

by Sergei

created 2021-12-11 08:59 UTC

Factory::create() A

↳ Parent: Factory

Complexity

Conditions	5
Paths	8

Size

Total Lines	19
Code Lines	12

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	11
CRAP Score	5

Importance

Changes	3
Bugs	0	Features	0

Metric	Value
cc	5
eloc	12
c	3
b	0
f	0
nc	8
nop	1
dl	0
loc	19
ccs	11
cts	11
cp	1
crap	5
rs	9.5555

<?php

declare(strict_types=1);

namespace Yiisoft\Factory;

use Psr\Container\ContainerInterface;
use Yiisoft\Definitions\ArrayDefinition;
use Yiisoft\Definitions\Contract\DefinitionInterface;
use Yiisoft\Definitions\Helpers\DefinitionValidator;
use Yiisoft\Definitions\Exception\CircularReferenceException;
use Yiisoft\Definitions\Exception\InvalidConfigException;
use Yiisoft\Definitions\Exception\NotInstantiableException;
use Yiisoft\Definitions\Helpers\Normalizer;

use function is_string;

/**
 * Factory allows creating objects passing arguments runtime.
 * A factory will try to use a PSR-11 compliant container to get dependencies,
 * but will fall back to manual instantiation
 * if the container cannot provide a required dependency.
 */
final class Factory
{
    private FactoryContainer $factoryContainer;

    /**
     * @var bool $validate If definitions should be validated when set.
     */
    private bool $validate;

    /**
     * Factory constructor.
     *
     * @param ContainerInterface $container Container to use for resolving dependencies.
     * @param array $definitions Definitions to create objects with.
     * @psalm-param array<string, mixed> $definitions
     *
     * @param bool $validate If definitions should be validated when set.
     *
     * @throws InvalidConfigException
     */
    public function __construct(
        ContainerInterface $container,
        array $definitions = [],
        bool $validate = true
    ) {
        $this->factoryContainer = new FactoryContainer($container);
        $this->validate = $validate;
        if ($this->validate) {
            $this->setMultiple($definitions);
        } else {
            $this->factoryContainer->setDefinitions($definitions);
        }
    }

    /**
     * Creates a new object using the given configuration.
     *
     * You may view this method as an enhanced version of the `new` operator.
     * The method supports creating an object based on a class name, a configuration array or
     * an anonymous function.
     *
     * Below are some usage examples:
     *
     * ```php
     * // create an object using a class name
     * $object = $factory->create(\Yiisoft\Db\Connection::class);
     *
     * // create an object using a configuration array
     * $object = $factory->create([
     *     'class' => \Yiisoft\Db\Connection\Connection::class,
     *     '__construct()' => [
     *         'dsn' => 'mysql:host=127.0.0.1;dbname=demo',
     *     ],
     *     'setUsername()' => ['root'],
     *     'setPassword()' => [''],
     *     'setCharset()' => ['utf8'],
     * ]);
     * ```
     *
     * Using [[Container|dependency injection container]], this method can also identify
     * dependent objects, instantiate them and inject them into the newly created object.
     *
     * @param mixed $config The object configuration. This can be specified in one of the following forms:
     *
     * - A string: representing the class name of the object to be created.
     *
     * - A configuration array: the array must contain a `class` element which is treated as the object class,
     *   and the rest of the name-value pairs will be used to initialize the corresponding object properties.
     *
     * - A PHP callable: either an anonymous function or an array representing a class method
     *   (`[$class or $object, $method]`). The callable should return a new instance of the object being created.
     *
     * @throws InvalidConfigException If the configuration is invalid.
     * @throws CircularReferenceException
     * @throws NotFoundException
     * @throws NotInstantiableException
     *
     * @return mixed|object The created object.
     *
     * @psalm-template T
     * @psalm-param mixed|class-string<T> $config
     * @psalm-return ($config is class-string ? T : mixed)
     * @psalm-suppress MixedReturnStatement
     */
    public function create($config)
    {
        if ($this->validate) {
            DefinitionValidator::validate($config);
        }

        if (is_string($config)) {
            if ($this->factoryContainer->hasDefinition($config)) {
                $definition = $this->factoryContainer->getDefinition($config);
            } elseif (class_exists($config)) {
                $definition = ArrayDefinition::fromPreparedData($config);
            } else {
                throw new NotFoundException($config);
            }
        } else {
            $definition = $this->createDefinition($config);
        }

        return $this->factoryContainer->create($definition);
    }

    /**
     * Sets a definition to the factory.
     *
     * @param mixed $definition
     *
     * @throws InvalidConfigException
     */
    public function set(string $id, $definition): void
    {
        if ($this->validate) {
            DefinitionValidator::validate($definition, $id);
        }

        $this->factoryContainer->setDefinition($id, $definition);
    }

    /**
     * Sets multiple definitions at once.
     *
     * @param array $definitions definitions indexed by their ids
     *
     * @psalm-param array<string, mixed> $definitions
     *
     * @throws InvalidConfigException
     */
    public function setMultiple(array $definitions): void
    {
        /** @var mixed $definition */
        foreach ($definitions as $id => $definition) {
            $this->set($id, $definition);
        }
    }

    /**
     * @param mixed $config
     *
     * @throws InvalidConfigException
     */
    private function createDefinition($config): DefinitionInterface
    {
        $definition = Normalizer::normalize($config);

        if (
            ($definition instanceof ArrayDefinition) &&
            $this->factoryContainer->hasDefinition($definition->getClass()) &&
            ($containerDefinition = $this->factoryContainer->getDefinition($definition->getClass())) instanceof ArrayDefinition
        ) {
            $definition = $this->mergeDefinitions(
                $containerDefinition,
                $definition
            );
        }

        return $definition;
    }

    private function mergeDefinitions(DefinitionInterface $one, ArrayDefinition $two): DefinitionInterface
    {
        return $one instanceof ArrayDefinition ? $one->merge($two) : $two;
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace Yiisoft\Factory;
6
7		use Psr\Container\ContainerInterface;
8		use Yiisoft\Definitions\ArrayDefinition;
9		use Yiisoft\Definitions\Contract\DefinitionInterface;
10		use Yiisoft\Definitions\Helpers\DefinitionValidator;
11		use Yiisoft\Definitions\Exception\CircularReferenceException;
12		use Yiisoft\Definitions\Exception\InvalidConfigException;
13		use Yiisoft\Definitions\Exception\NotInstantiableException;
14		use Yiisoft\Definitions\Helpers\Normalizer;
15
16		use function is_string;
17
18		/**
19		* Factory allows creating objects passing arguments runtime.
20		* A factory will try to use a PSR-11 compliant container to get dependencies,
21		* but will fall back to manual instantiation
22		* if the container cannot provide a required dependency.
23		*/
24		final class Factory
25		{
26		private FactoryContainer $factoryContainer;
27
28		/**
29		* @var bool $validate If definitions should be validated when set.
30		*/
31		private bool $validate;
32
33		/**
34		* Factory constructor.
35		*
36		* @param ContainerInterface $container Container to use for resolving dependencies.
37		* @param array $definitions Definitions to create objects with.
38		* @psalm-param array<string, mixed> $definitions
39		*
40		* @param bool $validate If definitions should be validated when set.
41		*
42		* @throws InvalidConfigException
43		*/
44	106	public function __construct(
45		ContainerInterface $container,
46		array $definitions = [],
47		bool $validate = true
48		) {
49	106	$this->factoryContainer = new FactoryContainer($container);
50	106	$this->validate = $validate;
51	106	if ($this->validate) {
52	102	$this->setMultiple($definitions);
53		} else {
54	4	$this->factoryContainer->setDefinitions($definitions);
55		}
56	104	}
57
58		/**
59		* Creates a new object using the given configuration.
60		*
61		* You may view this method as an enhanced version of the `new` operator.
62		* The method supports creating an object based on a class name, a configuration array or
63		* an anonymous function.
64		*
65		* Below are some usage examples:
66		*
67		* ```php
68		* // create an object using a class name
69		* $object = $factory->create(\Yiisoft\Db\Connection::class);
70		*
71		* // create an object using a configuration array
72		* $object = $factory->create([
73		* 'class' => \Yiisoft\Db\Connection\Connection::class,
74		* '__construct()' => [
75		* 'dsn' => 'mysql:host=127.0.0.1;dbname=demo',
76		* ],
77		* 'setUsername()' => ['root'],
78		* 'setPassword()' => [''],
79		* 'setCharset()' => ['utf8'],
80		* ]);
81		* ```
82		*
83		* Using [[Container\|dependency injection container]], this method can also identify
84		* dependent objects, instantiate them and inject them into the newly created object.
85		*
86		* @param mixed $config The object configuration. This can be specified in one of the following forms:
87		*
88		* - A string: representing the class name of the object to be created.
89		*
90		* - A configuration array: the array must contain a `class` element which is treated as the object class,
91		* and the rest of the name-value pairs will be used to initialize the corresponding object properties.
92		*
93		* - A PHP callable: either an anonymous function or an array representing a class method
94		* (`[$class or $object, $method]`). The callable should return a new instance of the object being created.
95		*
96		* @throws InvalidConfigException If the configuration is invalid.
97		* @throws CircularReferenceException
98		* @throws NotFoundException
99		* @throws NotInstantiableException
100		*
101		* @return mixed\|object The created object.
102		*
103		* @psalm-template T
104		* @psalm-param mixed\|class-string<T> $config
105		* @psalm-return ($config is class-string ? T : mixed)
106		* @psalm-suppress MixedReturnStatement
107		*/
108	103	public function create($config)
109		{
110	103	if ($this->validate) {
111	99	DefinitionValidator::validate($config);
112		}
113
114	99	if (is_string($config)) {
115	80	if ($this->factoryContainer->hasDefinition($config)) {
116	59	$definition = $this->factoryContainer->getDefinition($config);
117	21	} elseif (class_exists($config)) {
118	18	$definition = ArrayDefinition::fromPreparedData($config);
119		} else {
120	78	throw new NotFoundException($config);
121		}
122		} else {
123	21	$definition = $this->createDefinition($config);
124		}
125
126	93	return $this->factoryContainer->create($definition);
127		}
128
129		/**
130		* Sets a definition to the factory.
131		*
132		* @param mixed $definition
133		*
134		* @throws InvalidConfigException
135		*/
136	70	public function set(string $id, $definition): void
137		{
138	70	if ($this->validate) {
139	70	DefinitionValidator::validate($definition, $id);
140		}
141
142	67	$this->factoryContainer->setDefinition($id, $definition);
143	67	}
144
145		/**
146		* Sets multiple definitions at once.
147		*
148		* @param array $definitions definitions indexed by their ids
149		*
150		* @psalm-param array<string, mixed> $definitions
151		*
152		* @throws InvalidConfigException
153		*/
154	102	public function setMultiple(array $definitions): void
155		{
156		/** @var mixed $definition */
157	102	foreach ($definitions as $id => $definition) {
158	68	$this->set($id, $definition);
159		}
160	100	}
161
162		/**
163		* @param mixed $config
164		*
165		* @throws InvalidConfigException
166		*/
167	21	private function createDefinition($config): DefinitionInterface
168		{
169	21	$definition = Normalizer::normalize($config);
170
171		if (
172	20	($definition instanceof ArrayDefinition) &&
173	20	$this->factoryContainer->hasDefinition($definition->getClass()) &&
174	20	($containerDefinition = $this->factoryContainer->getDefinition($definition->getClass())) instanceof ArrayDefinition
175		) {
176	4	$definition = $this->mergeDefinitions(
177	4	$containerDefinition,
178		$definition
179		);
180		}
181
182	20	return $definition;
183		}
184
185	4	private function mergeDefinitions(DefinitionInterface $one, ArrayDefinition $two): DefinitionInterface
186		{
187	4	return $one instanceof ArrayDefinition ? $one->merge($two) : $two;
188		}
189		}
190

yiisoft / factory

Pull Request — master (#151)

Factory::create() A

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