Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\DependencyInjection\Compiler;
Chris@0: 
Chris@14: use Symfony\Component\Config\Resource\ClassExistenceResource;
Chris@0: use Symfony\Component\DependencyInjection\Config\AutowireServiceResource;
Chris@0: use Symfony\Component\DependencyInjection\ContainerBuilder;
Chris@0: use Symfony\Component\DependencyInjection\Definition;
Chris@14: use Symfony\Component\DependencyInjection\Exception\AutowiringFailedException;
Chris@0: use Symfony\Component\DependencyInjection\Exception\RuntimeException;
Chris@14: use Symfony\Component\DependencyInjection\LazyProxy\ProxyHelper;
Chris@14: use Symfony\Component\DependencyInjection\TypedReference;
Chris@0: 
Chris@0: /**
Chris@14:  * Inspects existing service definitions and wires the autowired ones using the type hints of their classes.
Chris@0:  *
Chris@0:  * @author Kévin Dunglas <dunglas@gmail.com>
Chris@14:  * @author Nicolas Grekas <p@tchwork.com>
Chris@0:  */
Chris@14: class AutowirePass extends AbstractRecursivePass
Chris@0: {
Chris@17:     private $definedTypes = [];
Chris@0:     private $types;
Chris@14:     private $ambiguousServiceTypes;
Chris@17:     private $autowired = [];
Chris@14:     private $lastFailure;
Chris@14:     private $throwOnAutowiringException;
Chris@17:     private $autowiringExceptions = [];
Chris@14:     private $strictMode;
Chris@14: 
Chris@14:     /**
Chris@14:      * @param bool $throwOnAutowireException Errors can be retrieved via Definition::getErrors()
Chris@14:      */
Chris@14:     public function __construct($throwOnAutowireException = true)
Chris@14:     {
Chris@14:         $this->throwOnAutowiringException = $throwOnAutowireException;
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * @deprecated since version 3.4, to be removed in 4.0.
Chris@14:      *
Chris@14:      * @return AutowiringFailedException[]
Chris@14:      */
Chris@14:     public function getAutowiringExceptions()
Chris@14:     {
Chris@14:         @trigger_error('Calling AutowirePass::getAutowiringExceptions() is deprecated since Symfony 3.4 and will be removed in 4.0. Use Definition::getErrors() instead.', E_USER_DEPRECATED);
Chris@14: 
Chris@14:         return $this->autowiringExceptions;
Chris@14:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function process(ContainerBuilder $container)
Chris@0:     {
Chris@14:         // clear out any possibly stored exceptions from before
Chris@17:         $this->autowiringExceptions = [];
Chris@14:         $this->strictMode = $container->hasParameter('container.autowiring.strict_mode') && $container->getParameter('container.autowiring.strict_mode');
Chris@0: 
Chris@0:         try {
Chris@14:             parent::process($container);
Chris@0:         } finally {
Chris@17:             $this->definedTypes = [];
Chris@0:             $this->types = null;
Chris@14:             $this->ambiguousServiceTypes = null;
Chris@17:             $this->autowired = [];
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Creates a resource to help know if this service has changed.
Chris@0:      *
Chris@0:      * @param \ReflectionClass $reflectionClass
Chris@0:      *
Chris@0:      * @return AutowireServiceResource
Chris@14:      *
Chris@14:      * @deprecated since version 3.3, to be removed in 4.0. Use ContainerBuilder::getReflectionClass() instead.
Chris@0:      */
Chris@0:     public static function createResourceForClass(\ReflectionClass $reflectionClass)
Chris@0:     {
Chris@14:         @trigger_error('The '.__METHOD__.'() method is deprecated since Symfony 3.3 and will be removed in 4.0. Use ContainerBuilder::getReflectionClass() instead.', E_USER_DEPRECATED);
Chris@14: 
Chris@17:         $metadata = [];
Chris@0: 
Chris@14:         foreach ($reflectionClass->getMethods(\ReflectionMethod::IS_PUBLIC) as $reflectionMethod) {
Chris@14:             if (!$reflectionMethod->isStatic()) {
Chris@14:                 $metadata[$reflectionMethod->name] = self::getResourceMetadataForMethod($reflectionMethod);
Chris@14:             }
Chris@0:         }
Chris@0: 
Chris@0:         return new AutowireServiceResource($reflectionClass->name, $reflectionClass->getFileName(), $metadata);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@14:      * {@inheritdoc}
Chris@0:      */
Chris@14:     protected function processValue($value, $isRoot = false)
Chris@0:     {
Chris@14:         try {
Chris@14:             return $this->doProcessValue($value, $isRoot);
Chris@14:         } catch (AutowiringFailedException $e) {
Chris@14:             if ($this->throwOnAutowiringException) {
Chris@14:                 throw $e;
Chris@14:             }
Chris@14: 
Chris@14:             $this->autowiringExceptions[] = $e;
Chris@14:             $this->container->getDefinition($this->currentId)->addError($e->getMessage());
Chris@14: 
Chris@14:             return parent::processValue($value, $isRoot);
Chris@14:         }
Chris@14:     }
Chris@14: 
Chris@14:     private function doProcessValue($value, $isRoot = false)
Chris@14:     {
Chris@14:         if ($value instanceof TypedReference) {
Chris@14:             if ($ref = $this->getAutowiredReference($value, $value->getRequiringClass() ? sprintf('for "%s" in "%s"', $value->getType(), $value->getRequiringClass()) : '')) {
Chris@14:                 return $ref;
Chris@14:             }
Chris@14:             $this->container->log($this, $this->createTypeNotFoundMessage($value, 'it'));
Chris@14:         }
Chris@14:         $value = parent::processValue($value, $isRoot);
Chris@14: 
Chris@14:         if (!$value instanceof Definition || !$value->isAutowired() || $value->isAbstract() || !$value->getClass()) {
Chris@14:             return $value;
Chris@14:         }
Chris@14:         if (!$reflectionClass = $this->container->getReflectionClass($value->getClass(), false)) {
Chris@14:             $this->container->log($this, sprintf('Skipping service "%s": Class or interface "%s" cannot be loaded.', $this->currentId, $value->getClass()));
Chris@14: 
Chris@14:             return $value;
Chris@0:         }
Chris@0: 
Chris@14:         $methodCalls = $value->getMethodCalls();
Chris@14: 
Chris@14:         try {
Chris@14:             $constructor = $this->getConstructor($value, false);
Chris@14:         } catch (RuntimeException $e) {
Chris@14:             throw new AutowiringFailedException($this->currentId, $e->getMessage(), 0, $e);
Chris@0:         }
Chris@0: 
Chris@14:         if ($constructor) {
Chris@17:             array_unshift($methodCalls, [$constructor, $value->getArguments()]);
Chris@0:         }
Chris@0: 
Chris@14:         $methodCalls = $this->autowireCalls($reflectionClass, $methodCalls);
Chris@14: 
Chris@14:         if ($constructor) {
Chris@14:             list(, $arguments) = array_shift($methodCalls);
Chris@14: 
Chris@14:             if ($arguments !== $value->getArguments()) {
Chris@14:                 $value->setArguments($arguments);
Chris@14:             }
Chris@0:         }
Chris@14: 
Chris@14:         if ($methodCalls !== $value->getMethodCalls()) {
Chris@14:             $value->setMethodCalls($methodCalls);
Chris@14:         }
Chris@14: 
Chris@14:         return $value;
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * @param \ReflectionClass $reflectionClass
Chris@14:      * @param array            $methodCalls
Chris@14:      *
Chris@14:      * @return array
Chris@14:      */
Chris@14:     private function autowireCalls(\ReflectionClass $reflectionClass, array $methodCalls)
Chris@14:     {
Chris@14:         foreach ($methodCalls as $i => $call) {
Chris@14:             list($method, $arguments) = $call;
Chris@14: 
Chris@14:             if ($method instanceof \ReflectionFunctionAbstract) {
Chris@14:                 $reflectionMethod = $method;
Chris@14:             } else {
Chris@18:                 $definition = new Definition($reflectionClass->name);
Chris@18:                 try {
Chris@18:                     $reflectionMethod = $this->getReflectionMethod($definition, $method);
Chris@18:                 } catch (RuntimeException $e) {
Chris@18:                     if ($definition->getFactory()) {
Chris@18:                         continue;
Chris@18:                     }
Chris@18:                     throw $e;
Chris@18:                 }
Chris@14:             }
Chris@14: 
Chris@14:             $arguments = $this->autowireMethod($reflectionMethod, $arguments);
Chris@14: 
Chris@14:             if ($arguments !== $call[1]) {
Chris@14:                 $methodCalls[$i][1] = $arguments;
Chris@14:             }
Chris@14:         }
Chris@14: 
Chris@14:         return $methodCalls;
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * Autowires the constructor or a method.
Chris@14:      *
Chris@14:      * @param \ReflectionFunctionAbstract $reflectionMethod
Chris@14:      * @param array                       $arguments
Chris@14:      *
Chris@14:      * @return array The autowired arguments
Chris@14:      *
Chris@14:      * @throws AutowiringFailedException
Chris@14:      */
Chris@14:     private function autowireMethod(\ReflectionFunctionAbstract $reflectionMethod, array $arguments)
Chris@14:     {
Chris@14:         $class = $reflectionMethod instanceof \ReflectionMethod ? $reflectionMethod->class : $this->currentId;
Chris@14:         $method = $reflectionMethod->name;
Chris@14:         $parameters = $reflectionMethod->getParameters();
Chris@14:         if (method_exists('ReflectionMethod', 'isVariadic') && $reflectionMethod->isVariadic()) {
Chris@0:             array_pop($parameters);
Chris@0:         }
Chris@0: 
Chris@0:         foreach ($parameters as $index => $parameter) {
Chris@18:             if (\array_key_exists($index, $arguments) && '' !== $arguments[$index]) {
Chris@0:                 continue;
Chris@0:             }
Chris@0: 
Chris@14:             $type = ProxyHelper::getTypeHint($reflectionMethod, $parameter, true);
Chris@0: 
Chris@14:             if (!$type) {
Chris@14:                 if (isset($arguments[$index])) {
Chris@0:                     continue;
Chris@0:                 }
Chris@0: 
Chris@14:                 // no default value? Then fail
Chris@14:                 if (!$parameter->isDefaultValueAvailable()) {
Chris@14:                     // For core classes, isDefaultValueAvailable() can
Chris@14:                     // be false when isOptional() returns true. If the
Chris@14:                     // argument *is* optional, allow it to be missing
Chris@14:                     if ($parameter->isOptional()) {
Chris@14:                         continue;
Chris@14:                     }
Chris@16:                     $type = ProxyHelper::getTypeHint($reflectionMethod, $parameter, false);
Chris@16:                     $type = $type ? sprintf('is type-hinted "%s"', $type) : 'has no type-hint';
Chris@16: 
Chris@16:                     throw new AutowiringFailedException($this->currentId, sprintf('Cannot autowire service "%s": argument "$%s" of method "%s()" %s, you should configure its value explicitly.', $this->currentId, $parameter->name, $class !== $this->currentId ? $class.'::'.$method : $method, $type));
Chris@0:                 }
Chris@0: 
Chris@14:                 // specifically pass the default value
Chris@14:                 $arguments[$index] = $parameter->getDefaultValue();
Chris@14: 
Chris@14:                 continue;
Chris@14:             }
Chris@14: 
Chris@14:             if (!$value = $this->getAutowiredReference($ref = new TypedReference($type, $type, !$parameter->isOptional() ? $class : ''), 'for '.sprintf('argument "$%s" of method "%s()"', $parameter->name, $class.'::'.$method))) {
Chris@14:                 $failureMessage = $this->createTypeNotFoundMessage($ref, sprintf('argument "$%s" of method "%s()"', $parameter->name, $class !== $this->currentId ? $class.'::'.$method : $method));
Chris@14: 
Chris@14:                 if ($parameter->isDefaultValueAvailable()) {
Chris@14:                     $value = $parameter->getDefaultValue();
Chris@14:                 } elseif (!$parameter->allowsNull()) {
Chris@14:                     throw new AutowiringFailedException($this->currentId, $failureMessage);
Chris@0:                 }
Chris@14:                 $this->container->log($this, $failureMessage);
Chris@0:             }
Chris@0: 
Chris@0:             $arguments[$index] = $value;
Chris@0:         }
Chris@0: 
Chris@0:         if ($parameters && !isset($arguments[++$index])) {
Chris@0:             while (0 <= --$index) {
Chris@0:                 $parameter = $parameters[$index];
Chris@0:                 if (!$parameter->isDefaultValueAvailable() || $parameter->getDefaultValue() !== $arguments[$index]) {
Chris@0:                     break;
Chris@0:                 }
Chris@0:                 unset($arguments[$index]);
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         // it's possible index 1 was set, then index 0, then 2, etc
Chris@0:         // make sure that we re-order so they're injected as expected
Chris@0:         ksort($arguments);
Chris@14: 
Chris@14:         return $arguments;
Chris@14:     }
Chris@14: 
Chris@14:     /**
Chris@14:      * @return TypedReference|null A reference to the service matching the given type, if any
Chris@14:      */
Chris@14:     private function getAutowiredReference(TypedReference $reference, $deprecationMessage)
Chris@14:     {
Chris@14:         $this->lastFailure = null;
Chris@14:         $type = $reference->getType();
Chris@14: 
Chris@14:         if ($type !== $this->container->normalizeId($reference) || ($this->container->has($type) && !$this->container->findDefinition($type)->isAbstract())) {
Chris@14:             return $reference;
Chris@14:         }
Chris@14: 
Chris@14:         if (null === $this->types) {
Chris@14:             $this->populateAvailableTypes($this->strictMode);
Chris@14:         }
Chris@14: 
Chris@14:         if (isset($this->definedTypes[$type])) {
Chris@14:             return new TypedReference($this->types[$type], $type);
Chris@14:         }
Chris@14: 
Chris@14:         if (!$this->strictMode && isset($this->types[$type])) {
Chris@14:             $message = 'Autowiring services based on the types they implement is deprecated since Symfony 3.3 and won\'t be supported in version 4.0.';
Chris@14:             if ($aliasSuggestion = $this->getAliasesSuggestionForType($type = $reference->getType(), $deprecationMessage)) {
Chris@14:                 $message .= ' '.$aliasSuggestion;
Chris@14:             } else {
Chris@14:                 $message .= sprintf(' You should %s the "%s" service to "%s" instead.', isset($this->types[$this->types[$type]]) ? 'alias' : 'rename (or alias)', $this->types[$type], $type);
Chris@14:             }
Chris@14: 
Chris@14:             @trigger_error($message, E_USER_DEPRECATED);
Chris@14: 
Chris@14:             return new TypedReference($this->types[$type], $type);
Chris@14:         }
Chris@14: 
Chris@14:         if (!$reference->canBeAutoregistered() || isset($this->types[$type]) || isset($this->ambiguousServiceTypes[$type])) {
Chris@14:             return;
Chris@14:         }
Chris@14: 
Chris@14:         if (isset($this->autowired[$type])) {
Chris@14:             return $this->autowired[$type] ? new TypedReference($this->autowired[$type], $type) : null;
Chris@14:         }
Chris@14: 
Chris@14:         if (!$this->strictMode) {
Chris@14:             return $this->createAutowiredDefinition($type);
Chris@14:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Populates the list of available types.
Chris@0:      */
Chris@14:     private function populateAvailableTypes($onlyAutowiringTypes = false)
Chris@0:     {
Chris@17:         $this->types = [];
Chris@14:         if (!$onlyAutowiringTypes) {
Chris@17:             $this->ambiguousServiceTypes = [];
Chris@14:         }
Chris@0: 
Chris@0:         foreach ($this->container->getDefinitions() as $id => $definition) {
Chris@14:             $this->populateAvailableType($id, $definition, $onlyAutowiringTypes);
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Populates the list of available types for a given definition.
Chris@0:      *
Chris@0:      * @param string     $id
Chris@0:      * @param Definition $definition
Chris@0:      */
Chris@14:     private function populateAvailableType($id, Definition $definition, $onlyAutowiringTypes)
Chris@0:     {
Chris@0:         // Never use abstract services
Chris@0:         if ($definition->isAbstract()) {
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@14:         foreach ($definition->getAutowiringTypes(false) as $type) {
Chris@0:             $this->definedTypes[$type] = true;
Chris@0:             $this->types[$type] = $id;
Chris@0:             unset($this->ambiguousServiceTypes[$type]);
Chris@0:         }
Chris@0: 
Chris@14:         if ($onlyAutowiringTypes) {
Chris@14:             return;
Chris@14:         }
Chris@14: 
Chris@14:         if (preg_match('/^\d+_[^~]++~[._a-zA-Z\d]{7}$/', $id) || $definition->isDeprecated() || !$reflectionClass = $this->container->getReflectionClass($definition->getClass(), false)) {
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@0:         foreach ($reflectionClass->getInterfaces() as $reflectionInterface) {
Chris@0:             $this->set($reflectionInterface->name, $id);
Chris@0:         }
Chris@0: 
Chris@0:         do {
Chris@0:             $this->set($reflectionClass->name, $id);
Chris@0:         } while ($reflectionClass = $reflectionClass->getParentClass());
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Associates a type and a service id if applicable.
Chris@0:      *
Chris@0:      * @param string $type
Chris@0:      * @param string $id
Chris@0:      */
Chris@0:     private function set($type, $id)
Chris@0:     {
Chris@0:         if (isset($this->definedTypes[$type])) {
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@0:         // is this already a type/class that is known to match multiple services?
Chris@0:         if (isset($this->ambiguousServiceTypes[$type])) {
Chris@0:             $this->ambiguousServiceTypes[$type][] = $id;
Chris@0: 
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@0:         // check to make sure the type doesn't match multiple services
Chris@0:         if (!isset($this->types[$type]) || $this->types[$type] === $id) {
Chris@0:             $this->types[$type] = $id;
Chris@0: 
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@0:         // keep an array of all services matching this type
Chris@0:         if (!isset($this->ambiguousServiceTypes[$type])) {
Chris@17:             $this->ambiguousServiceTypes[$type] = [$this->types[$type]];
Chris@0:             unset($this->types[$type]);
Chris@0:         }
Chris@0:         $this->ambiguousServiceTypes[$type][] = $id;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Registers a definition for the type if possible or throws an exception.
Chris@0:      *
Chris@14:      * @param string $type
Chris@0:      *
Chris@14:      * @return TypedReference|null A reference to the registered definition
Chris@0:      */
Chris@14:     private function createAutowiredDefinition($type)
Chris@0:     {
Chris@14:         if (!($typeHint = $this->container->getReflectionClass($type, false)) || !$typeHint->isInstantiable()) {
Chris@14:             return;
Chris@0:         }
Chris@0: 
Chris@14:         $currentId = $this->currentId;
Chris@14:         $this->currentId = $type;
Chris@14:         $this->autowired[$type] = $argumentId = sprintf('autowired.%s', $type);
Chris@14:         $argumentDefinition = new Definition($type);
Chris@14:         $argumentDefinition->setPublic(false);
Chris@14:         $argumentDefinition->setAutowired(true);
Chris@14: 
Chris@14:         try {
Chris@14:             $originalThrowSetting = $this->throwOnAutowiringException;
Chris@14:             $this->throwOnAutowiringException = true;
Chris@14:             $this->processValue($argumentDefinition, true);
Chris@14:             $this->container->setDefinition($argumentId, $argumentDefinition);
Chris@14:         } catch (AutowiringFailedException $e) {
Chris@14:             $this->autowired[$type] = false;
Chris@14:             $this->lastFailure = $e->getMessage();
Chris@14:             $this->container->log($this, $this->lastFailure);
Chris@14: 
Chris@14:             return;
Chris@14:         } finally {
Chris@14:             $this->throwOnAutowiringException = $originalThrowSetting;
Chris@14:             $this->currentId = $currentId;
Chris@0:         }
Chris@0: 
Chris@14:         @trigger_error(sprintf('Relying on service auto-registration for type "%s" is deprecated since Symfony 3.4 and won\'t be supported in 4.0. Create a service named "%s" instead.', $type, $type), E_USER_DEPRECATED);
Chris@0: 
Chris@14:         $this->container->log($this, sprintf('Type "%s" has been auto-registered for service "%s".', $type, $this->currentId));
Chris@0: 
Chris@14:         return new TypedReference($argumentId, $type);
Chris@14:     }
Chris@14: 
Chris@14:     private function createTypeNotFoundMessage(TypedReference $reference, $label)
Chris@14:     {
Chris@17:         $trackResources = $this->container->isTrackingResources();
Chris@17:         $this->container->setResourceTracking(false);
Chris@17:         try {
Chris@17:             if ($r = $this->container->getReflectionClass($type = $reference->getType(), false)) {
Chris@17:                 $alternatives = $this->createTypeAlternatives($reference);
Chris@17:             }
Chris@17:         } finally {
Chris@17:             $this->container->setResourceTracking($trackResources);
Chris@17:         }
Chris@17: 
Chris@17:         if (!$r) {
Chris@14:             // either $type does not exist or a parent class does not exist
Chris@14:             try {
Chris@14:                 $resource = new ClassExistenceResource($type, false);
Chris@14:                 // isFresh() will explode ONLY if a parent class/trait does not exist
Chris@14:                 $resource->isFresh(0);
Chris@14:                 $parentMsg = false;
Chris@14:             } catch (\ReflectionException $e) {
Chris@14:                 $parentMsg = $e->getMessage();
Chris@14:             }
Chris@14: 
Chris@14:             $message = sprintf('has type "%s" but this class %s.', $type, $parentMsg ? sprintf('is missing a parent class (%s)', $parentMsg) : 'was not found');
Chris@14:         } else {
Chris@14:             $message = $this->container->has($type) ? 'this service is abstract' : 'no such service exists';
Chris@14:             $message = sprintf('references %s "%s" but %s.%s', $r->isInterface() ? 'interface' : 'class', $type, $message, $alternatives);
Chris@14: 
Chris@14:             if ($r->isInterface() && !$alternatives) {
Chris@14:                 $message .= ' Did you create a class that implements this interface?';
Chris@14:             }
Chris@0:         }
Chris@0: 
Chris@14:         $message = sprintf('Cannot autowire service "%s": %s %s', $this->currentId, $label, $message);
Chris@14: 
Chris@14:         if (null !== $this->lastFailure) {
Chris@14:             $message = $this->lastFailure."\n".$message;
Chris@14:             $this->lastFailure = null;
Chris@14:         }
Chris@14: 
Chris@14:         return $message;
Chris@14:     }
Chris@14: 
Chris@14:     private function createTypeAlternatives(TypedReference $reference)
Chris@14:     {
Chris@14:         // try suggesting available aliases first
Chris@14:         if ($message = $this->getAliasesSuggestionForType($type = $reference->getType())) {
Chris@14:             return ' '.$message;
Chris@14:         }
Chris@14:         if (null === $this->ambiguousServiceTypes) {
Chris@14:             $this->populateAvailableTypes();
Chris@14:         }
Chris@14: 
Chris@14:         if (isset($this->ambiguousServiceTypes[$type])) {
Chris@14:             $message = sprintf('one of these existing services: "%s"', implode('", "', $this->ambiguousServiceTypes[$type]));
Chris@14:         } elseif (isset($this->types[$type])) {
Chris@14:             $message = sprintf('the existing "%s" service', $this->types[$type]);
Chris@14:         } elseif ($reference->getRequiringClass() && !$reference->canBeAutoregistered() && !$this->strictMode) {
Chris@14:             return ' It cannot be auto-registered because it is from a different root namespace.';
Chris@14:         } else {
Chris@14:             return;
Chris@14:         }
Chris@14: 
Chris@14:         return sprintf(' You should maybe alias this %s to %s.', class_exists($type, false) ? 'class' : 'interface', $message);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@14:      * @deprecated since version 3.3, to be removed in 4.0.
Chris@0:      */
Chris@0:     private static function getResourceMetadataForMethod(\ReflectionMethod $method)
Chris@0:     {
Chris@17:         $methodArgumentsMetadata = [];
Chris@0:         foreach ($method->getParameters() as $parameter) {
Chris@0:             try {
Chris@0:                 $class = $parameter->getClass();
Chris@0:             } catch (\ReflectionException $e) {
Chris@0:                 // type-hint is against a non-existent class
Chris@0:                 $class = false;
Chris@0:             }
Chris@0: 
Chris@0:             $isVariadic = method_exists($parameter, 'isVariadic') && $parameter->isVariadic();
Chris@17:             $methodArgumentsMetadata[] = [
Chris@0:                 'class' => $class,
Chris@0:                 'isOptional' => $parameter->isOptional(),
Chris@0:                 'defaultValue' => ($parameter->isOptional() && !$isVariadic) ? $parameter->getDefaultValue() : null,
Chris@17:             ];
Chris@0:         }
Chris@0: 
Chris@0:         return $methodArgumentsMetadata;
Chris@0:     }
Chris@14: 
Chris@14:     private function getAliasesSuggestionForType($type, $extraContext = null)
Chris@14:     {
Chris@17:         $aliases = [];
Chris@14:         foreach (class_parents($type) + class_implements($type) as $parent) {
Chris@14:             if ($this->container->has($parent) && !$this->container->findDefinition($parent)->isAbstract()) {
Chris@14:                 $aliases[] = $parent;
Chris@14:             }
Chris@14:         }
Chris@14: 
Chris@14:         $extraContext = $extraContext ? ' '.$extraContext : '';
Chris@17:         if (1 < $len = \count($aliases)) {
Chris@14:             $message = sprintf('Try changing the type-hint%s to one of its parents: ', $extraContext);
Chris@14:             for ($i = 0, --$len; $i < $len; ++$i) {
Chris@14:                 $message .= sprintf('%s "%s", ', class_exists($aliases[$i], false) ? 'class' : 'interface', $aliases[$i]);
Chris@14:             }
Chris@14:             $message .= sprintf('or %s "%s".', class_exists($aliases[$i], false) ? 'class' : 'interface', $aliases[$i]);
Chris@14: 
Chris@14:             return $message;
Chris@14:         }
Chris@14: 
Chris@14:         if ($aliases) {
Chris@14:             return sprintf('Try changing the type-hint%s to "%s" instead.', $extraContext, $aliases[0]);
Chris@14:         }
Chris@14:     }
Chris@0: }