Symfony\Component\DependencyInjection\Loader\XmlFileLoader::parseDefinition PHP Method

    private function parseDefinition(\DOMElement $service, $file)
    {
        if ($alias = $service->getAttribute('alias')) {
            $this->validateAlias($service, $file);

            $public = true;
            if ($publicAttr = $service->getAttribute('public')) {
                $public = XmlUtils::phpize($publicAttr);
            }
            $this->container->setAlias((string) $service->getAttribute('id'), new Alias($alias, $public));

            return;
        }

        if ($parent = $service->getAttribute('parent')) {
            $definition = new ChildDefinition($parent);
        } else {
            $definition = new Definition();
        }

        foreach (array('class', 'shared', 'public', 'synthetic', 'lazy', 'abstract') as $key) {
            if ($value = $service->getAttribute($key)) {
                $method = 'set'.$key;
                $definition->$method(XmlUtils::phpize($value));
            }
        }

        if ($value = $service->getAttribute('autowire')) {
            $definition->setAutowired(XmlUtils::phpize($value));
        }

        if ($files = $this->getChildren($service, 'file')) {
            $definition->setFile($files[0]->nodeValue);
        }

        if ($deprecated = $this->getChildren($service, 'deprecated')) {
            $definition->setDeprecated(true, $deprecated[0]->nodeValue ?: null);
        }

        $definition->setArguments($this->getArgumentsAsPhp($service, 'argument'));
        $definition->setProperties($this->getArgumentsAsPhp($service, 'property'));

        if ($factories = $this->getChildren($service, 'factory')) {
            $factory = $factories[0];
            if ($function = $factory->getAttribute('function')) {
                $definition->setFactory($function);
            } else {
                $factoryService = $this->getChildren($factory, 'service');

                if (isset($factoryService[0])) {
                    $class = $this->parseDefinition($factoryService[0], $file);
                } elseif ($childService = $factory->getAttribute('service')) {
                    $class = new Reference($childService, ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE, false);
                } else {
                    $class = $factory->getAttribute('class');
                }

                $definition->setFactory(array($class, $factory->getAttribute('method')));
            }
        }

        if ($configurators = $this->getChildren($service, 'configurator')) {
            $configurator = $configurators[0];
            if ($function = $configurator->getAttribute('function')) {
                $definition->setConfigurator($function);
            } else {
                $configuratorService = $this->getChildren($configurator, 'service');

                if (isset($configuratorService[0])) {
                    $class = $this->parseDefinition($configuratorService[0], $file);
                } elseif ($childService = $configurator->getAttribute('service')) {
                    $class = new Reference($childService, ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE, false);
                } else {
                    $class = $configurator->getAttribute('class');
                }

                $definition->setConfigurator(array($class, $configurator->getAttribute('method')));
            }
        }

        foreach ($this->getChildren($service, 'call') as $call) {
            $definition->addMethodCall($call->getAttribute('method'), $this->getArgumentsAsPhp($call, 'argument'));
        }

        foreach ($this->getChildren($service, 'tag') as $tag) {
            $parameters = array();
            foreach ($tag->attributes as $name => $node) {
                if ('name' === $name) {
                    continue;
                }

                if (false !== strpos($name, '-') && false === strpos($name, '_') && !array_key_exists($normalizedName = str_replace('-', '_', $name), $parameters)) {
                    $parameters[$normalizedName] = XmlUtils::phpize($node->nodeValue);
                }
                // keep not normalized key
                $parameters[$name] = XmlUtils::phpize($node->nodeValue);
            }

            if ('' === $tag->getAttribute('name')) {
                throw new InvalidArgumentException(sprintf('The tag name for service "%s" in %s must be a non-empty string.', (string) $service->getAttribute('id'), $file));
            }

            $definition->addTag($tag->getAttribute('name'), $parameters);
        }

        foreach ($this->getChildren($service, 'autowiring-type') as $type) {
            $definition->addAutowiringType($type->textContent);
        }

        $autowireTags = array();
        foreach ($this->getChildren($service, 'autowire') as $type) {
            $autowireTags[] = $type->textContent;
        }

        if ($autowireTags) {
            if ($service->hasAttribute('autowire')) {
                throw new InvalidArgumentException(sprintf('The "autowire" attribute cannot be used together with "<autowire>" tags for service "%s" in %s.', (string) $service->getAttribute('id'), $file));
            }

            $definition->setAutowiredMethods($autowireTags);
        }

        if ($value = $service->getAttribute('decorates')) {
            $renameId = $service->hasAttribute('decoration-inner-name') ? $service->getAttribute('decoration-inner-name') : null;
            $priority = $service->hasAttribute('decoration-priority') ? $service->getAttribute('decoration-priority') : 0;
            $definition->setDecoratedService($value, $renameId, $priority);
        }

        return $definition;
    }