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