Biurad\DependencyInjection\Container::createInstance()

Complexity

Conditions	9
Paths	9

Size

Total Lines	47
Code Lines	20

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

<?php
    public function createInstance(string $class, array $args = [])
    {
        try {
            $reflector = new ReflectionClass($class);
        } catch (ReflectionException $e) {
            throw new ContainerResolutionException("Targeted class [$class] does not exist.", 0, $e);
        }

        // If the type is not instantiable, the developer is attempting to resolve
        // an abstract type such as an Interface or Abstract Class and there is
        // no binding registered for the abstractions so we need to bail out.
        if (!$reflector->isInstantiable()) {
            throw new ContainerResolutionException("Targeted [$class] is not instantiable");
        }

        $constructor = $reflector->getConstructor();

        // If there are no constructors, that means there are no dependencies then
        // we can just resolve the instances of the objects right away, without
        // resolving any other types or dependencies out of these containers.
        if (null === $constructor) {
            return $reflector->newInstance();
        }

        // Once we have all the constructor's parameters we can create each of the
        // dependency instances and then use the reflection instances to make a
        // new instance of this class, injecting the created dependencies in.
        // this will be handled in a recursive way...
        try {
            $instances = $this->autowireArguments($constructor, $args);
        } catch (MissingServiceException $e) {
            // Resolve default pararamters on class, if paramter was not given and
            // default paramter exists, why not let's use it.
            foreach ($constructor->getParameters() as $position => $parameter) {
                try {
                    if (!(isset($args[$position]) || isset($args[$parameter->name]))) {
                        $args[$position] = Reflection::getParameterDefaultValue($parameter);
                    }
                } catch (ReflectionException $e) {
                    continue;
                }
            }

            return $this->createInstance($class, $args);
        }

        return $reflector->newInstanceArgs($instances);
    }