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<?php |
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namespace yii\di\definitions; |
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use Psr\Container\ContainerInterface; |
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use yii\di\contracts\Definition; |
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use yii\di\exceptions\NotInstantiableException; |
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use yii\di\resolvers\ClassNameResolver; |
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/** |
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* Builds object by ArrayDefinition. |
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*/ |
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class ArrayBuilder |
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{ |
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private static $dependencies = []; |
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public function build(ContainerInterface $container, ArrayDefinition $def) |
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{ |
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$class = $def->getClass(); |
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$dependencies = $this->getDependencies($class); |
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if (!empty($def->getParams())) { |
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foreach (array_values($def->getParams()) as $index => $param) { |
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if ($param instanceof Definition) { |
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$dependencies[$index] = $param; |
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} else { |
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$dependencies[$index] = new ValueDefinition($param); |
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} |
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} |
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} |
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$resolved = $this->resolveDependencies($container, $dependencies); |
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$object = new $class(...$resolved); |
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return $this->configure($container, $object, $def->getConfig()); |
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} |
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/** |
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* Resolves dependencies by replacing them with the actual object instances. |
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* @param ContainerInterface $container |
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* @param Definition[] $dependencies the dependencies |
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* @return array the resolved dependencies |
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*/ |
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private function resolveDependencies(ContainerInterface $container, array $dependencies): array |
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{ |
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$container = $container->parentContainer ?? $container; |
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$result = []; |
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/** @var Definition $dependency */ |
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foreach ($dependencies as $dependency) { |
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$result[] = $this->resolveDependency($container, $dependency); |
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} |
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return $result; |
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} |
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/** |
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* This function resolves a dependency recursively, checking for loops. |
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* TODO add checking for loops |
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* @param ContainerInterface $container |
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* @param Definition $dependency |
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* @return mixed |
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*/ |
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private function resolveDependency(ContainerInterface $container, Definition $dependency) |
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{ |
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while ($dependency instanceof Definition) { |
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$dependency = $dependency->resolve($container); |
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} |
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return $dependency; |
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} |
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/** |
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* Returns the dependencies of the specified class. |
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* @param string $class class name, interface name or alias name |
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* @return Definition[] the dependencies of the specified class. |
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* @throws NotInstantiableException |
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* @internal |
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*/ |
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private function getDependencies(string $class): array |
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{ |
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if (!isset(self::$dependencies[$class])) { |
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self::$dependencies[$class] = $this->getResolver()->resolveConstructor($class); |
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} |
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return self::$dependencies[$class]; |
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} |
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private static $resolver; |
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private function getResolver() |
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{ |
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if (static::$resolver === null) { |
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// For now use hard coded resolver. |
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static::$resolver = new ClassNameResolver(); |
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} |
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return static::$resolver; |
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} |
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/** |
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* Configures an object with the given configuration. |
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* @param ContainerInterface $container |
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* @param object $object the object to be configured |
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* @param iterable $config property values and methods to call |
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* @return object the object itself |
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*/ |
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private function configure(ContainerInterface $container, $object, iterable $config) |
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{ |
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foreach ($config as $action => $arguments) { |
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if (substr($action, -2) === '()') { |
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// method call |
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\call_user_func_array([$object, substr($action, 0, -2)], $arguments); |
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} else { |
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// property |
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if ($arguments instanceof Definition) { |
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$arguments = $arguments->resolve($container); |
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} |
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$object->$action = $arguments; |
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} |
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} |
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return $object; |
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} |
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} |
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yiisoft /
di
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