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<?php |
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/** |
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* Phoole (PHP7.2+) |
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* |
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* @category Library |
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* @package Phoole\Di |
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* @copyright Copyright (c) 2019 Hong Zhang |
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*/ |
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declare(strict_types=1); |
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namespace Phoole\Di\Util; |
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use Phoole\Di\Exception\LogicException; |
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use Phoole\Di\Exception\UnresolvedClassException; |
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/** |
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* FactoryTrait |
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* |
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* Fabricate object by its definition |
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* |
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* @package Phoole\Di |
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*/ |
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trait FactoryTrait |
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{ |
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use AutowiringTrait; |
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/** |
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* fabricate the object using the definition |
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* |
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* @param array $definition |
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* @return object |
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* @throws LogicException if something goes wrong |
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* @throws UnresolvedClassException if parameter unresolved |
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*/ |
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protected function fabricate(array $definition): object |
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{ |
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// beforehand |
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$this->aroundConstruct($definition, 'before'); |
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// construct it |
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if (is_string($definition['class'])) { // class name provided |
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$obj = $this->constructObject($definition['class'], $definition['args']); |
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} else { // callable stored in $def['class'] |
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$obj = $this->executeCallable($definition['class'], $definition['args']); |
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} |
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// aftermath |
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return $this->aroundConstruct($definition, 'after', $obj); |
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} |
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/** |
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* fix object definition |
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* |
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* @param string|object|callable $definition |
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* @return array |
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*/ |
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protected function fixDefinition($definition): array |
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{ |
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if (!is_array($definition) || !isset($definition['class'])) { |
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$definition = ['class' => $definition]; |
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} |
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if (!isset($definition['args'])) { |
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$definition['args'] = []; |
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} |
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return (array) $definition; |
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} |
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/** |
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* Instantiate service object |
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* |
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* @param string $class class name |
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* @param array $arguments constructor arguments |
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* @return object |
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* @throws UnresolvedClassException |
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* @throws LogicException |
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*/ |
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protected function constructObject(string $class, array $arguments): object |
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{ |
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try { |
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$reflector = new \ReflectionClass($class); |
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$constructor = $reflector->getConstructor(); |
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if (is_null($constructor)) { |
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return $reflector->newInstanceWithoutConstructor(); |
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} else { |
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$arguments = $this->matchArguments( |
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$arguments, $constructor->getParameters() |
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); |
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return $reflector->newInstanceArgs($arguments); |
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} |
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} catch (UnresolvedClassException $e) { |
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throw $e; |
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} catch (\Throwable $e) { |
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throw new LogicException($e->getMessage()); |
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} |
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} |
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/** |
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* execute callable |
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* |
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* @param callable|object $callable callable |
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* @param array $arguments constructor arguments |
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* @return mixed |
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* @throws LogicException if something goes wrong |
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* @throws UnresolvedClassException if parameter unresolved |
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*/ |
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protected function executeCallable($callable, array $arguments) |
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{ |
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if (is_callable($callable)) { |
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try { |
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$arguments = $this->matchArguments( |
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$arguments, $this->getCallableParameters($callable) |
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); |
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return call_user_func_array($callable, $arguments); |
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} catch (UnresolvedClassException $e) { |
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throw $e; |
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} catch (\Throwable $e) { |
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throw new LogicException($e->getMessage()); |
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} |
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} |
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if (is_object($callable)) { |
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return $callable; |
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} |
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throw new LogicException((string) $callable . " not a callable"); |
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} |
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/** |
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* Processing service beforehand / aftermath |
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* |
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* @param array $definition service definition |
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* @param string $stage 'before' or 'after' |
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* @param object $object the created object |
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* @return object|null |
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* @throws UnresolvedClassException |
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* @throws LogicException |
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*/ |
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protected function aroundConstruct( |
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array $definition, string $stage, ?object $object = NULL |
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): ?object { |
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if (isset($definition[$stage])) { |
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foreach ($definition[$stage] as $line) { |
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list($callable, $arguments) = $this->fixMethod((array) $line, $object); |
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$this->executeCallable($callable, $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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* fix methods in the 'after'|'before' part of definition |
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* |
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* @param array $line |
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* @param object|null $object |
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* @return array [Callable, arguments] |
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* @throws LogicException if goes wrong |
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*/ |
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protected function fixMethod(array $line, ?object $object = NULL): array |
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{ |
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if (is_callable($line[0])) { |
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$callable = $line[0]; |
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} elseif (is_string($line[0]) && is_object($object) && method_exists($object, $line[0])) { |
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$callable = [$object, $line[0]]; |
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} else { |
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throw new LogicException("Bad method definition: $line"); |
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} |
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return [$callable, (array) ($line[1] ?? [])]; |
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} |
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} |
phoole /
di
