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\Loader;
Chris@0: 
Chris@0: use Symfony\Component\Config\Resource\FileResource;
Chris@0: use Symfony\Component\Config\Util\XmlUtils;
Chris@0: use Symfony\Component\DependencyInjection\DefinitionDecorator;
Chris@0: use Symfony\Component\DependencyInjection\ContainerInterface;
Chris@0: use Symfony\Component\DependencyInjection\Alias;
Chris@0: use Symfony\Component\DependencyInjection\Definition;
Chris@0: use Symfony\Component\DependencyInjection\Reference;
Chris@0: use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
Chris@0: use Symfony\Component\DependencyInjection\Exception\RuntimeException;
Chris@0: use Symfony\Component\ExpressionLanguage\Expression;
Chris@0: 
Chris@0: /**
Chris@0:  * XmlFileLoader loads XML files service definitions.
Chris@0:  *
Chris@0:  * @author Fabien Potencier <fabien@symfony.com>
Chris@0:  */
Chris@0: class XmlFileLoader extends FileLoader
Chris@0: {
Chris@0:     const NS = 'http://symfony.com/schema/dic/services';
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function load($resource, $type = null)
Chris@0:     {
Chris@0:         $path = $this->locator->locate($resource);
Chris@0: 
Chris@0:         $xml = $this->parseFileToDOM($path);
Chris@0: 
Chris@0:         $this->container->addResource(new FileResource($path));
Chris@0: 
Chris@0:         // anonymous services
Chris@0:         $this->processAnonymousServices($xml, $path);
Chris@0: 
Chris@0:         // imports
Chris@0:         $this->parseImports($xml, $path);
Chris@0: 
Chris@0:         // parameters
Chris@0:         $this->parseParameters($xml);
Chris@0: 
Chris@0:         // extensions
Chris@0:         $this->loadFromExtensions($xml);
Chris@0: 
Chris@0:         // services
Chris@0:         $this->parseDefinitions($xml, $path);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function supports($resource, $type = null)
Chris@0:     {
Chris@0:         return is_string($resource) && 'xml' === pathinfo($resource, PATHINFO_EXTENSION);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Parses parameters.
Chris@0:      *
Chris@0:      * @param \DOMDocument $xml
Chris@0:      */
Chris@0:     private function parseParameters(\DOMDocument $xml)
Chris@0:     {
Chris@0:         if ($parameters = $this->getChildren($xml->documentElement, 'parameters')) {
Chris@0:             $this->container->getParameterBag()->add($this->getArgumentsAsPhp($parameters[0], 'parameter'));
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Parses imports.
Chris@0:      *
Chris@0:      * @param \DOMDocument $xml
Chris@0:      * @param string       $file
Chris@0:      */
Chris@0:     private function parseImports(\DOMDocument $xml, $file)
Chris@0:     {
Chris@0:         $xpath = new \DOMXPath($xml);
Chris@0:         $xpath->registerNamespace('container', self::NS);
Chris@0: 
Chris@0:         if (false === $imports = $xpath->query('//container:imports/container:import')) {
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@0:         $defaultDirectory = dirname($file);
Chris@0:         foreach ($imports as $import) {
Chris@0:             $this->setCurrentDir($defaultDirectory);
Chris@0:             $this->import($import->getAttribute('resource'), null, (bool) XmlUtils::phpize($import->getAttribute('ignore-errors')), $file);
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Parses multiple definitions.
Chris@0:      *
Chris@0:      * @param \DOMDocument $xml
Chris@0:      * @param string       $file
Chris@0:      */
Chris@0:     private function parseDefinitions(\DOMDocument $xml, $file)
Chris@0:     {
Chris@0:         $xpath = new \DOMXPath($xml);
Chris@0:         $xpath->registerNamespace('container', self::NS);
Chris@0: 
Chris@0:         if (false === $services = $xpath->query('//container:services/container:service')) {
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@0:         foreach ($services as $service) {
Chris@0:             if (null !== $definition = $this->parseDefinition($service, $file)) {
Chris@0:                 $this->container->setDefinition((string) $service->getAttribute('id'), $definition);
Chris@0:             }
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Parses an individual Definition.
Chris@0:      *
Chris@0:      * @param \DOMElement $service
Chris@0:      * @param string      $file
Chris@0:      *
Chris@0:      * @return Definition|null
Chris@0:      */
Chris@0:     private function parseDefinition(\DOMElement $service, $file)
Chris@0:     {
Chris@0:         if ($alias = $service->getAttribute('alias')) {
Chris@0:             $this->validateAlias($service, $file);
Chris@0: 
Chris@0:             $public = true;
Chris@0:             if ($publicAttr = $service->getAttribute('public')) {
Chris@0:                 $public = XmlUtils::phpize($publicAttr);
Chris@0:             }
Chris@0:             $this->container->setAlias((string) $service->getAttribute('id'), new Alias($alias, $public));
Chris@0: 
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@0:         if ($parent = $service->getAttribute('parent')) {
Chris@0:             $definition = new DefinitionDecorator($parent);
Chris@0:         } else {
Chris@0:             $definition = new Definition();
Chris@0:         }
Chris@0: 
Chris@0:         foreach (array('class', 'shared', 'public', 'synthetic', 'lazy', 'abstract') as $key) {
Chris@0:             if ($value = $service->getAttribute($key)) {
Chris@0:                 $method = 'set'.$key;
Chris@0:                 $definition->$method(XmlUtils::phpize($value));
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         if ($value = $service->getAttribute('autowire')) {
Chris@0:             $definition->setAutowired(XmlUtils::phpize($value));
Chris@0:         }
Chris@0: 
Chris@0:         if ($files = $this->getChildren($service, 'file')) {
Chris@0:             $definition->setFile($files[0]->nodeValue);
Chris@0:         }
Chris@0: 
Chris@0:         if ($deprecated = $this->getChildren($service, 'deprecated')) {
Chris@0:             $definition->setDeprecated(true, $deprecated[0]->nodeValue ?: null);
Chris@0:         }
Chris@0: 
Chris@0:         $definition->setArguments($this->getArgumentsAsPhp($service, 'argument'));
Chris@0:         $definition->setProperties($this->getArgumentsAsPhp($service, 'property'));
Chris@0: 
Chris@0:         if ($factories = $this->getChildren($service, 'factory')) {
Chris@0:             $factory = $factories[0];
Chris@0:             if ($function = $factory->getAttribute('function')) {
Chris@0:                 $definition->setFactory($function);
Chris@0:             } else {
Chris@0:                 $factoryService = $this->getChildren($factory, 'service');
Chris@0: 
Chris@0:                 if (isset($factoryService[0])) {
Chris@0:                     $class = $this->parseDefinition($factoryService[0], $file);
Chris@0:                 } elseif ($childService = $factory->getAttribute('service')) {
Chris@0:                     $class = new Reference($childService, ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE);
Chris@0:                 } else {
Chris@0:                     $class = $factory->getAttribute('class');
Chris@0:                 }
Chris@0: 
Chris@0:                 $definition->setFactory(array($class, $factory->getAttribute('method')));
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         if ($configurators = $this->getChildren($service, 'configurator')) {
Chris@0:             $configurator = $configurators[0];
Chris@0:             if ($function = $configurator->getAttribute('function')) {
Chris@0:                 $definition->setConfigurator($function);
Chris@0:             } else {
Chris@0:                 $configuratorService = $this->getChildren($configurator, 'service');
Chris@0: 
Chris@0:                 if (isset($configuratorService[0])) {
Chris@0:                     $class = $this->parseDefinition($configuratorService[0], $file);
Chris@0:                 } elseif ($childService = $configurator->getAttribute('service')) {
Chris@0:                     $class = new Reference($childService, ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE);
Chris@0:                 } else {
Chris@0:                     $class = $configurator->getAttribute('class');
Chris@0:                 }
Chris@0: 
Chris@0:                 $definition->setConfigurator(array($class, $configurator->getAttribute('method')));
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         foreach ($this->getChildren($service, 'call') as $call) {
Chris@0:             $definition->addMethodCall($call->getAttribute('method'), $this->getArgumentsAsPhp($call, 'argument'));
Chris@0:         }
Chris@0: 
Chris@0:         foreach ($this->getChildren($service, 'tag') as $tag) {
Chris@0:             $parameters = array();
Chris@0:             foreach ($tag->attributes as $name => $node) {
Chris@0:                 if ('name' === $name) {
Chris@0:                     continue;
Chris@0:                 }
Chris@0: 
Chris@0:                 if (false !== strpos($name, '-') && false === strpos($name, '_') && !array_key_exists($normalizedName = str_replace('-', '_', $name), $parameters)) {
Chris@0:                     $parameters[$normalizedName] = XmlUtils::phpize($node->nodeValue);
Chris@0:                 }
Chris@0:                 // keep not normalized key
Chris@0:                 $parameters[$name] = XmlUtils::phpize($node->nodeValue);
Chris@0:             }
Chris@0: 
Chris@0:             if ('' === $tag->getAttribute('name')) {
Chris@0:                 throw new InvalidArgumentException(sprintf('The tag name for service "%s" in %s must be a non-empty string.', (string) $service->getAttribute('id'), $file));
Chris@0:             }
Chris@0: 
Chris@0:             $definition->addTag($tag->getAttribute('name'), $parameters);
Chris@0:         }
Chris@0: 
Chris@0:         foreach ($this->getChildren($service, 'autowiring-type') as $type) {
Chris@0:             $definition->addAutowiringType($type->textContent);
Chris@0:         }
Chris@0: 
Chris@0:         if ($value = $service->getAttribute('decorates')) {
Chris@0:             $renameId = $service->hasAttribute('decoration-inner-name') ? $service->getAttribute('decoration-inner-name') : null;
Chris@0:             $priority = $service->hasAttribute('decoration-priority') ? $service->getAttribute('decoration-priority') : 0;
Chris@0:             $definition->setDecoratedService($value, $renameId, $priority);
Chris@0:         }
Chris@0: 
Chris@0:         return $definition;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Parses a XML file to a \DOMDocument.
Chris@0:      *
Chris@0:      * @param string $file Path to a file
Chris@0:      *
Chris@0:      * @return \DOMDocument
Chris@0:      *
Chris@0:      * @throws InvalidArgumentException When loading of XML file returns error
Chris@0:      */
Chris@0:     private function parseFileToDOM($file)
Chris@0:     {
Chris@0:         try {
Chris@0:             $dom = XmlUtils::loadFile($file, array($this, 'validateSchema'));
Chris@0:         } catch (\InvalidArgumentException $e) {
Chris@0:             throw new InvalidArgumentException(sprintf('Unable to parse file "%s".', $file), $e->getCode(), $e);
Chris@0:         }
Chris@0: 
Chris@0:         $this->validateExtensions($dom, $file);
Chris@0: 
Chris@0:         return $dom;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Processes anonymous services.
Chris@0:      *
Chris@0:      * @param \DOMDocument $xml
Chris@0:      * @param string       $file
Chris@0:      */
Chris@0:     private function processAnonymousServices(\DOMDocument $xml, $file)
Chris@0:     {
Chris@0:         $definitions = array();
Chris@0:         $count = 0;
Chris@0: 
Chris@0:         $xpath = new \DOMXPath($xml);
Chris@0:         $xpath->registerNamespace('container', self::NS);
Chris@0: 
Chris@0:         // anonymous services as arguments/properties
Chris@0:         if (false !== $nodes = $xpath->query('//container:argument[@type="service"][not(@id)]|//container:property[@type="service"][not(@id)]')) {
Chris@0:             foreach ($nodes as $node) {
Chris@0:                 // give it a unique name
Chris@0:                 $id = sprintf('%s_%d', hash('sha256', $file), ++$count);
Chris@0:                 $node->setAttribute('id', $id);
Chris@0: 
Chris@0:                 if ($services = $this->getChildren($node, 'service')) {
Chris@0:                     $definitions[$id] = array($services[0], $file, false);
Chris@0:                     $services[0]->setAttribute('id', $id);
Chris@0: 
Chris@0:                     // anonymous services are always private
Chris@0:                     // we could not use the constant false here, because of XML parsing
Chris@0:                     $services[0]->setAttribute('public', 'false');
Chris@0:                 }
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         // anonymous services "in the wild"
Chris@0:         if (false !== $nodes = $xpath->query('//container:services/container:service[not(@id)]')) {
Chris@0:             foreach ($nodes as $node) {
Chris@0:                 // give it a unique name
Chris@0:                 $id = sprintf('%s_%d', hash('sha256', $file), ++$count);
Chris@0:                 $node->setAttribute('id', $id);
Chris@0:                 $definitions[$id] = array($node, $file, true);
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         // resolve definitions
Chris@0:         krsort($definitions);
Chris@0:         foreach ($definitions as $id => list($domElement, $file, $wild)) {
Chris@0:             if (null !== $definition = $this->parseDefinition($domElement, $file)) {
Chris@0:                 $this->container->setDefinition($id, $definition);
Chris@0:             }
Chris@0: 
Chris@0:             if (true === $wild) {
Chris@0:                 $tmpDomElement = new \DOMElement('_services', null, self::NS);
Chris@0:                 $domElement->parentNode->replaceChild($tmpDomElement, $domElement);
Chris@0:                 $tmpDomElement->setAttribute('id', $id);
Chris@0:             } else {
Chris@0:                 $domElement->parentNode->removeChild($domElement);
Chris@0:             }
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Returns arguments as valid php types.
Chris@0:      *
Chris@0:      * @param \DOMElement $node
Chris@0:      * @param string      $name
Chris@0:      * @param bool        $lowercase
Chris@0:      *
Chris@0:      * @return mixed
Chris@0:      */
Chris@0:     private function getArgumentsAsPhp(\DOMElement $node, $name, $lowercase = true)
Chris@0:     {
Chris@0:         $arguments = array();
Chris@0:         foreach ($this->getChildren($node, $name) as $arg) {
Chris@0:             if ($arg->hasAttribute('name')) {
Chris@0:                 $arg->setAttribute('key', $arg->getAttribute('name'));
Chris@0:             }
Chris@0: 
Chris@0:             // this is used by DefinitionDecorator to overwrite a specific
Chris@0:             // argument of the parent definition
Chris@0:             if ($arg->hasAttribute('index')) {
Chris@0:                 $key = 'index_'.$arg->getAttribute('index');
Chris@0:             } elseif (!$arg->hasAttribute('key')) {
Chris@0:                 // Append an empty argument, then fetch its key to overwrite it later
Chris@0:                 $arguments[] = null;
Chris@0:                 $keys = array_keys($arguments);
Chris@0:                 $key = array_pop($keys);
Chris@0:             } else {
Chris@0:                 $key = $arg->getAttribute('key');
Chris@0: 
Chris@0:                 // parameter keys are case insensitive
Chris@0:                 if ('parameter' == $name && $lowercase) {
Chris@0:                     $key = strtolower($key);
Chris@0:                 }
Chris@0:             }
Chris@0: 
Chris@0:             switch ($arg->getAttribute('type')) {
Chris@0:                 case 'service':
Chris@0:                     $onInvalid = $arg->getAttribute('on-invalid');
Chris@0:                     $invalidBehavior = ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE;
Chris@0:                     if ('ignore' == $onInvalid) {
Chris@0:                         $invalidBehavior = ContainerInterface::IGNORE_ON_INVALID_REFERENCE;
Chris@0:                     } elseif ('null' == $onInvalid) {
Chris@0:                         $invalidBehavior = ContainerInterface::NULL_ON_INVALID_REFERENCE;
Chris@0:                     }
Chris@0: 
Chris@0:                     $arguments[$key] = new Reference($arg->getAttribute('id'), $invalidBehavior);
Chris@0:                     break;
Chris@0:                 case 'expression':
Chris@0:                     $arguments[$key] = new Expression($arg->nodeValue);
Chris@0:                     break;
Chris@0:                 case 'collection':
Chris@0:                     $arguments[$key] = $this->getArgumentsAsPhp($arg, $name, false);
Chris@0:                     break;
Chris@0:                 case 'string':
Chris@0:                     $arguments[$key] = $arg->nodeValue;
Chris@0:                     break;
Chris@0:                 case 'constant':
Chris@0:                     $arguments[$key] = constant(trim($arg->nodeValue));
Chris@0:                     break;
Chris@0:                 default:
Chris@0:                     $arguments[$key] = XmlUtils::phpize($arg->nodeValue);
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         return $arguments;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Get child elements by name.
Chris@0:      *
Chris@0:      * @param \DOMNode $node
Chris@0:      * @param mixed    $name
Chris@0:      *
Chris@0:      * @return array
Chris@0:      */
Chris@0:     private function getChildren(\DOMNode $node, $name)
Chris@0:     {
Chris@0:         $children = array();
Chris@0:         foreach ($node->childNodes as $child) {
Chris@0:             if ($child instanceof \DOMElement && $child->localName === $name && $child->namespaceURI === self::NS) {
Chris@0:                 $children[] = $child;
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         return $children;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Validates a documents XML schema.
Chris@0:      *
Chris@0:      * @param \DOMDocument $dom
Chris@0:      *
Chris@0:      * @return bool
Chris@0:      *
Chris@0:      * @throws RuntimeException When extension references a non-existent XSD file
Chris@0:      */
Chris@0:     public function validateSchema(\DOMDocument $dom)
Chris@0:     {
Chris@0:         $schemaLocations = array('http://symfony.com/schema/dic/services' => str_replace('\\', '/', __DIR__.'/schema/dic/services/services-1.0.xsd'));
Chris@0: 
Chris@0:         if ($element = $dom->documentElement->getAttributeNS('http://www.w3.org/2001/XMLSchema-instance', 'schemaLocation')) {
Chris@0:             $items = preg_split('/\s+/', $element);
Chris@0:             for ($i = 0, $nb = count($items); $i < $nb; $i += 2) {
Chris@0:                 if (!$this->container->hasExtension($items[$i])) {
Chris@0:                     continue;
Chris@0:                 }
Chris@0: 
Chris@0:                 if (($extension = $this->container->getExtension($items[$i])) && false !== $extension->getXsdValidationBasePath()) {
Chris@0:                     $path = str_replace($extension->getNamespace(), str_replace('\\', '/', $extension->getXsdValidationBasePath()).'/', $items[$i + 1]);
Chris@0: 
Chris@0:                     if (!is_file($path)) {
Chris@0:                         throw new RuntimeException(sprintf('Extension "%s" references a non-existent XSD file "%s"', get_class($extension), $path));
Chris@0:                     }
Chris@0: 
Chris@0:                     $schemaLocations[$items[$i]] = $path;
Chris@0:                 }
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         $tmpfiles = array();
Chris@0:         $imports = '';
Chris@0:         foreach ($schemaLocations as $namespace => $location) {
Chris@0:             $parts = explode('/', $location);
Chris@0:             if (0 === stripos($location, 'phar://')) {
Chris@0:                 $tmpfile = tempnam(sys_get_temp_dir(), 'sf2');
Chris@0:                 if ($tmpfile) {
Chris@0:                     copy($location, $tmpfile);
Chris@0:                     $tmpfiles[] = $tmpfile;
Chris@0:                     $parts = explode('/', str_replace('\\', '/', $tmpfile));
Chris@0:                 }
Chris@0:             }
Chris@0:             $drive = '\\' === DIRECTORY_SEPARATOR ? array_shift($parts).'/' : '';
Chris@0:             $location = 'file:///'.$drive.implode('/', array_map('rawurlencode', $parts));
Chris@0: 
Chris@0:             $imports .= sprintf('  <xsd:import namespace="%s" schemaLocation="%s" />'."\n", $namespace, $location);
Chris@0:         }
Chris@0: 
Chris@0:         $source = <<<EOF
Chris@0: <?xml version="1.0" encoding="utf-8" ?>
Chris@0: <xsd:schema xmlns="http://symfony.com/schema"
Chris@0:     xmlns:xsd="http://www.w3.org/2001/XMLSchema"
Chris@0:     targetNamespace="http://symfony.com/schema"
Chris@0:     elementFormDefault="qualified">
Chris@0: 
Chris@0:     <xsd:import namespace="http://www.w3.org/XML/1998/namespace"/>
Chris@0: $imports
Chris@0: </xsd:schema>
Chris@0: EOF
Chris@0:         ;
Chris@0: 
Chris@0:         $disableEntities = libxml_disable_entity_loader(false);
Chris@0:         $valid = @$dom->schemaValidateSource($source);
Chris@0:         libxml_disable_entity_loader($disableEntities);
Chris@0: 
Chris@0:         foreach ($tmpfiles as $tmpfile) {
Chris@0:             @unlink($tmpfile);
Chris@0:         }
Chris@0: 
Chris@0:         return $valid;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Validates an alias.
Chris@0:      *
Chris@0:      * @param \DOMElement $alias
Chris@0:      * @param string      $file
Chris@0:      */
Chris@0:     private function validateAlias(\DOMElement $alias, $file)
Chris@0:     {
Chris@0:         foreach ($alias->attributes as $name => $node) {
Chris@0:             if (!in_array($name, array('alias', 'id', 'public'))) {
Chris@0:                 @trigger_error(sprintf('Using the attribute "%s" is deprecated for the service "%s" which is defined as an alias in "%s". Allowed attributes for service aliases are "alias", "id" and "public". The XmlFileLoader will raise an exception in Symfony 4.0, instead of silently ignoring unsupported attributes.', $name, $alias->getAttribute('id'), $file), E_USER_DEPRECATED);
Chris@0:             }
Chris@0:         }
Chris@0: 
Chris@0:         foreach ($alias->childNodes as $child) {
Chris@0:             if ($child instanceof \DOMElement && $child->namespaceURI === self::NS) {
Chris@0:                 @trigger_error(sprintf('Using the element "%s" is deprecated for the service "%s" which is defined as an alias in "%s". The XmlFileLoader will raise an exception in Symfony 4.0, instead of silently ignoring unsupported elements.', $child->localName, $alias->getAttribute('id'), $file), E_USER_DEPRECATED);
Chris@0:             }
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Validates an extension.
Chris@0:      *
Chris@0:      * @param \DOMDocument $dom
Chris@0:      * @param string       $file
Chris@0:      *
Chris@0:      * @throws InvalidArgumentException When no extension is found corresponding to a tag
Chris@0:      */
Chris@0:     private function validateExtensions(\DOMDocument $dom, $file)
Chris@0:     {
Chris@0:         foreach ($dom->documentElement->childNodes as $node) {
Chris@0:             if (!$node instanceof \DOMElement || 'http://symfony.com/schema/dic/services' === $node->namespaceURI) {
Chris@0:                 continue;
Chris@0:             }
Chris@0: 
Chris@0:             // can it be handled by an extension?
Chris@0:             if (!$this->container->hasExtension($node->namespaceURI)) {
Chris@0:                 $extensionNamespaces = array_filter(array_map(function ($ext) { return $ext->getNamespace(); }, $this->container->getExtensions()));
Chris@0:                 throw new InvalidArgumentException(sprintf(
Chris@0:                     'There is no extension able to load the configuration for "%s" (in %s). Looked for namespace "%s", found %s',
Chris@0:                     $node->tagName,
Chris@0:                     $file,
Chris@0:                     $node->namespaceURI,
Chris@0:                     $extensionNamespaces ? sprintf('"%s"', implode('", "', $extensionNamespaces)) : 'none'
Chris@0:                 ));
Chris@0:             }
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Loads from an extension.
Chris@0:      *
Chris@0:      * @param \DOMDocument $xml
Chris@0:      */
Chris@0:     private function loadFromExtensions(\DOMDocument $xml)
Chris@0:     {
Chris@0:         foreach ($xml->documentElement->childNodes as $node) {
Chris@0:             if (!$node instanceof \DOMElement || $node->namespaceURI === self::NS) {
Chris@0:                 continue;
Chris@0:             }
Chris@0: 
Chris@0:             $values = static::convertDomElementToArray($node);
Chris@0:             if (!is_array($values)) {
Chris@0:                 $values = array();
Chris@0:             }
Chris@0: 
Chris@0:             $this->container->loadFromExtension($node->namespaceURI, $values);
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Converts a \DomElement object to a PHP array.
Chris@0:      *
Chris@0:      * The following rules applies during the conversion:
Chris@0:      *
Chris@0:      *  * Each tag is converted to a key value or an array
Chris@0:      *    if there is more than one "value"
Chris@0:      *
Chris@0:      *  * The content of a tag is set under a "value" key (<foo>bar</foo>)
Chris@0:      *    if the tag also has some nested tags
Chris@0:      *
Chris@0:      *  * The attributes are converted to keys (<foo foo="bar"/>)
Chris@0:      *
Chris@0:      *  * The nested-tags are converted to keys (<foo><foo>bar</foo></foo>)
Chris@0:      *
Chris@0:      * @param \DomElement $element A \DomElement instance
Chris@0:      *
Chris@0:      * @return array A PHP array
Chris@0:      */
Chris@0:     public static function convertDomElementToArray(\DOMElement $element)
Chris@0:     {
Chris@0:         return XmlUtils::convertDomElementToArray($element);
Chris@0:     }
Chris@0: }