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<?php |
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/** |
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* @author: RunnerLee |
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* @email: [email protected] |
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* @time: 2019-04 |
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*/ |
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namespace Runner\Container; |
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use ArrayAccess; |
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use Closure; |
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use Exception; |
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use ReflectionClass; |
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use ReflectionException; |
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use ReflectionParameter; |
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use Runner\Container\Exceptions\BindingResolutionException; |
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class Container implements ArrayAccess |
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{ |
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/** |
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* @var array |
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*/ |
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protected $bindings = []; |
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/** |
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* @var array |
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*/ |
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protected $instances = []; |
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/** |
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* @var array |
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*/ |
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protected $shares = []; |
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/** |
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* @param $name |
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* @param null $concrete |
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* @param bool $share |
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*/ |
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public function bind($name, $concrete = null, $share = false) |
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{ |
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if (is_null($concrete)) { |
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$concrete = $name; |
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} |
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$this->bindings[$name] = $concrete; |
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$share && $this->shares[$name] = true; |
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} |
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/** |
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* @param string $name |
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* |
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* @throws ReflectionException |
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* |
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* @return object |
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*/ |
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public function make($name) |
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{ |
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if (isset($this->instances[$name])) { |
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return $this->instances[$name]; |
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} |
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$instance = $this->build($name); |
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if (isset($this->shares[$name])) { |
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$this->instances[$name] = $instance; |
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} |
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return $instance; |
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} |
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/** |
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* @param $name |
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* |
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* @return mixed|object |
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* |
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* @throws ReflectionException |
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*/ |
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protected function build($name) |
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{ |
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$concrete = $this->getConcrete($name); |
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if ($concrete instanceof Closure) { |
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return $concrete($this); |
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} |
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$reflector = new ReflectionClass($concrete); |
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if (!$reflector->isInstantiable()) { |
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throw new BindingResolutionException(sprintf('%s is not instantiable', $name)); |
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} |
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$constructor = $reflector->getConstructor(); |
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if (!$constructor || !$constructor->getParameters()) { |
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return $reflector->newInstance(); |
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} |
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return $reflector->newInstanceArgs($this->getDependencies($constructor->getParameters())); |
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} |
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/** |
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* @param ReflectionParameter[] $reflectionParameters |
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* |
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* @throws |
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* |
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* @return array |
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*/ |
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protected function getDependencies(array $reflectionParameters) |
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{ |
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$result = []; |
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foreach ($reflectionParameters as $parameter) { |
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if (!is_null($parameter->getClass())) { |
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try { |
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$result[] = $this->make($parameter->getClass()->getName()); |
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} catch (Exception $exception) { |
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if (!$parameter->isOptional()) { |
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throw $exception; |
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} |
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$result[] = $parameter->getDefaultValue(); |
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} |
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} else { |
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if (!$parameter->isDefaultValueAvailable()) { |
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throw new BindingResolutionException( |
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sprintf( |
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'parameter %s has no default value in %s', |
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$parameter->getName(), |
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$parameter->getDeclaringClass()->getName() |
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) |
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); |
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} |
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$result[] = $parameter->getDefaultValue(); |
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} |
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} |
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return $result; |
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} |
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/** |
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* @param $name |
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* |
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* @return string|Closure |
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*/ |
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protected function getConcrete($name) |
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{ |
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$concrete = $this->bindings[$name] ?? $name; |
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if (!is_object($concrete) && $concrete !== $name && isset($this->bindings[$concrete])) { |
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$concrete = function () use ($concrete) { |
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return $this->make($concrete); |
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}; |
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} |
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return $concrete; |
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} |
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/** |
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* @param $name |
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* @param $instance |
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* |
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* @return mixed |
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*/ |
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protected function saveInstanceIfShareable($name, $instance) |
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{ |
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if (isset($this->shares[$name])) { |
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$this->instances[$name] = $instance; |
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} |
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return $instance; |
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} |
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/** |
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* @param mixed $offset |
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* |
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* @return bool |
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*/ |
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public function offsetExists($offset) |
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{ |
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return isset($this->instances[$offset]) || isset($this->bindings[$offset]); |
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} |
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/** |
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* @param mixed $offset |
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* |
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* @throws ReflectionException |
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* |
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* @return mixed|object |
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*/ |
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1 |
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public function offsetGet($offset) |
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{ |
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return $this->make($offset); |
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} |
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/** |
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* @param mixed $offset |
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* @param mixed $value |
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*/ |
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public function offsetSet($offset, $value) |
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{ |
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$this->instances[$offset] = $value; |
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} |
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/** |
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* @param mixed $offset |
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*/ |
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1 |
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public function offsetUnset($offset) |
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{ |
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unset($this->instances[$offset]); |
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} |
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} |
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RunnerLee /
container
