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<?php |
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|
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namespace Invoker; |
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|
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use Interop\Container\ContainerInterface; |
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use Invoker\Exception\NotCallableException; |
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use Invoker\Exception\NotEnoughParametersException; |
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use Invoker\ParameterResolver\AssociativeArrayResolver; |
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use Invoker\ParameterResolver\DefaultValueResolver; |
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use Invoker\ParameterResolver\NumericArrayResolver; |
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use Invoker\ParameterResolver\ParameterResolver; |
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use Invoker\ParameterResolver\ResolverChain; |
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use Invoker\Reflection\CallableReflection; |
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|
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/** |
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* Invoke a callable. |
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* |
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* @author Matthieu Napoli <[email protected]> |
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*/ |
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class Invoker implements InvokerInterface |
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{ |
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/** |
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* @var CallableResolver|null |
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*/ |
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private $callableResolver; |
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|
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/** |
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* @var ParameterResolver |
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*/ |
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private $parameterResolver; |
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|
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/** |
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* @var ContainerInterface|null |
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*/ |
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private $container; |
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|
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public function __construct(ParameterResolver $parameterResolver = null, ContainerInterface $container = null) |
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{ |
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$this->parameterResolver = $parameterResolver ?: $this->createParameterResolver(); |
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$this->container = $container; |
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|
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if ($container) { |
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$this->callableResolver = new CallableResolver($container); |
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} |
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} |
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|
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/** |
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* {@inheritdoc} |
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*/ |
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public function call($callable, array $parameters = array()) |
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{ |
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if ($this->callableResolver) { |
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$callable = $this->callableResolver->resolve($callable); |
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} |
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|
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if (! is_callable($callable)) { |
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throw new NotCallableException(sprintf( |
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'%s is not a callable', |
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is_object($callable) ? 'Instance of ' . get_class($callable) : var_export($callable, true) |
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)); |
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} |
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|
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$callableReflection = CallableReflection::create($callable); |
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|
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$args = $this->parameterResolver->getParameters($callableReflection, $parameters, array()); |
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|
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// Sort by array key because call_user_func_array ignores numeric keys |
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ksort($args); |
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|
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// Check all parameters are resolved |
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$diff = array_diff_key($callableReflection->getParameters(), $args); |
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if (! empty($diff)) { |
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/** @var \ReflectionParameter $parameter */ |
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$parameter = reset($diff); |
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throw new NotEnoughParametersException(sprintf( |
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'Unable to invoke the callable because no value was given for parameter %d ($%s)', |
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$parameter->getPosition() + 1, |
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$parameter->name |
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)); |
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} |
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|
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return call_user_func_array($callable, $args); |
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} |
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|
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/** |
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* Create the default parameter resolver. |
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* |
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* @return ParameterResolver |
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*/ |
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private function createParameterResolver() |
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{ |
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return new ResolverChain(array( |
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new NumericArrayResolver, |
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new AssociativeArrayResolver, |
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new DefaultValueResolver, |
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)); |
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} |
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|
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/** |
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* @return ParameterResolver By default it's a ResolverChain |
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*/ |
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public function getParameterResolver() |
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{ |
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return $this->parameterResolver; |
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} |
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|
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/** |
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* @return ContainerInterface|null |
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*/ |
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public function getContainer() |
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{ |
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return $this->container; |
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} |
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|
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/** |
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* @return CallableResolver|null Returns null if no container was given in the constructor. |
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*/ |
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public function getCallableResolver() |
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{ |
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return $this->callableResolver; |
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} |
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} |
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