comparison vendor/symfony/dependency-injection/Dumper/PhpDumper.php @ 0:4c8ae668cc8c

Initial import (non-working)

+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[e-mail]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\DependencyInjection\Dumper;
+
+use Symfony\Component\DependencyInjection\Variable;
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Reference;
+use Symfony\Component\DependencyInjection\Parameter;
+use Symfony\Component\DependencyInjection\Exception\EnvParameterException;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+use Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException;
+use Symfony\Component\DependencyInjection\LazyProxy\PhpDumper\DumperInterface as ProxyDumper;
+use Symfony\Component\DependencyInjection\LazyProxy\PhpDumper\NullDumper;
+use Symfony\Component\DependencyInjection\ExpressionLanguage;
+use Symfony\Component\ExpressionLanguage\Expression;
+use Symfony\Component\HttpKernel\Kernel;
+
+/**
+ * PhpDumper dumps a service container as a PHP class.
+ *
+ * @author Fabien Potencier <[e-mail]>
+ * @author Johannes M. Schmitt <[e-mail]>
+ */
+class PhpDumper extends Dumper
+{
+    /**
+     * Characters that might appear in the generated variable name as first character.
+     *
+     * @var string
+     */
+    const FIRST_CHARS = 'abcdefghijklmnopqrstuvwxyz';
+
+    /**
+     * Characters that might appear in the generated variable name as any but the first character.
+     *
+     * @var string
+     */
+    const NON_FIRST_CHARS = 'abcdefghijklmnopqrstuvwxyz0123456789_';
+
+    private $inlinedDefinitions;
+    private $definitionVariables;
+    private $referenceVariables;
+    private $variableCount;
+    private $reservedVariables = array('instance', 'class');
+    private $expressionLanguage;
+    private $targetDirRegex;
+    private $targetDirMaxMatches;
+    private $docStar;
+    private $serviceIdToMethodNameMap;
+    private $usedMethodNames;
+
+    /**
+     * @var \Symfony\Component\DependencyInjection\LazyProxy\PhpDumper\DumperInterface
+     */
+    private $proxyDumper;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __construct(ContainerBuilder $container)
+    {
+        parent::__construct($container);
+
+        $this->inlinedDefinitions = new \SplObjectStorage();
+    }
+
+    /**
+     * Sets the dumper to be used when dumping proxies in the generated container.
+     *
+     * @param ProxyDumper $proxyDumper
+     */
+    public function setProxyDumper(ProxyDumper $proxyDumper)
+    {
+        $this->proxyDumper = $proxyDumper;
+    }
+
+    /**
+     * Dumps the service container as a PHP class.
+     *
+     * Available options:
+     *
+     *  * class:      The class name
+     *  * base_class: The base class name
+     *  * namespace:  The class namespace
+     *
+     * @param array $options An array of options
+     *
+     * @return string A PHP class representing of the service container
+     *
+     * @throws EnvParameterException When an env var exists but has not been dumped
+     */
+    public function dump(array $options = array())
+    {
+        $this->targetDirRegex = null;
+        $options = array_merge(array(
+            'class' => 'ProjectServiceContainer',
+            'base_class' => 'Container',
+            'namespace' => '',
+            'debug' => true,
+        ), $options);
+
+        $this->initializeMethodNamesMap($options['base_class']);
+
+        $this->docStar = $options['debug'] ? '*' : '';
+
+        if (!empty($options['file']) && is_dir($dir = dirname($options['file']))) {
+            // Build a regexp where the first root dirs are mandatory,
+            // but every other sub-dir is optional up to the full path in $dir
+            // Mandate at least 2 root dirs and not more that 5 optional dirs.
+
+            $dir = explode(DIRECTORY_SEPARATOR, realpath($dir));
+            $i = count($dir);
+
+            if (3 <= $i) {
+                $regex = '';
+                $lastOptionalDir = $i > 8 ? $i - 5 : 3;
+                $this->targetDirMaxMatches = $i - $lastOptionalDir;
+
+                while (--$i >= $lastOptionalDir) {
+                    $regex = sprintf('(%s%s)?', preg_quote(DIRECTORY_SEPARATOR.$dir[$i], '#'), $regex);
+                }
+
+                do {
+                    $regex = preg_quote(DIRECTORY_SEPARATOR.$dir[$i], '#').$regex;
+                } while (0 < --$i);
+
+                $this->targetDirRegex = '#'.preg_quote($dir[0], '#').$regex.'#';
+            }
+        }
+
+        $code = $this->startClass($options['class'], $options['base_class'], $options['namespace']);
+
+        if ($this->container->isFrozen()) {
+            $code .= $this->addFrozenConstructor();
+            $code .= $this->addFrozenCompile();
+            $code .= $this->addIsFrozenMethod();
+        } else {
+            $code .= $this->addConstructor();
+        }
+
+        $code .=
+            $this->addServices().
+            $this->addDefaultParametersMethod().
+            $this->endClass().
+            $this->addProxyClasses()
+        ;
+        $this->targetDirRegex = null;
+
+        $unusedEnvs = array();
+        foreach ($this->container->getEnvCounters() as $env => $use) {
+            if (!$use) {
+                $unusedEnvs[] = $env;
+            }
+        }
+        if ($unusedEnvs) {
+            throw new EnvParameterException($unusedEnvs);
+        }
+
+        return $code;
+    }
+
+    /**
+     * Retrieves the currently set proxy dumper or instantiates one.
+     *
+     * @return ProxyDumper
+     */
+    private function getProxyDumper()
+    {
+        if (!$this->proxyDumper) {
+            $this->proxyDumper = new NullDumper();
+        }
+
+        return $this->proxyDumper;
+    }
+
+    /**
+     * Generates Service local temp variables.
+     *
+     * @param string $cId
+     * @param string $definition
+     *
+     * @return string
+     */
+    private function addServiceLocalTempVariables($cId, $definition)
+    {
+        static $template = "        \$%s = %s;\n";
+
+        $localDefinitions = array_merge(
+            array($definition),
+            $this->getInlinedDefinitions($definition)
+        );
+
+        $calls = $behavior = array();
+        foreach ($localDefinitions as $iDefinition) {
+            $this->getServiceCallsFromArguments($iDefinition->getArguments(), $calls, $behavior);
+            $this->getServiceCallsFromArguments($iDefinition->getMethodCalls(), $calls, $behavior);
+            $this->getServiceCallsFromArguments($iDefinition->getProperties(), $calls, $behavior);
+            $this->getServiceCallsFromArguments(array($iDefinition->getConfigurator()), $calls, $behavior);
+            $this->getServiceCallsFromArguments(array($iDefinition->getFactory()), $calls, $behavior);
+        }
+
+        $code = '';
+        foreach ($calls as $id => $callCount) {
+            if ('service_container' === $id || $id === $cId) {
+                continue;
+            }
+
+            if ($callCount > 1) {
+                $name = $this->getNextVariableName();
+                $this->referenceVariables[$id] = new Variable($name);
+
+                if (ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE === $behavior[$id]) {
+                    $code .= sprintf($template, $name, $this->getServiceCall($id));
+                } else {
+                    $code .= sprintf($template, $name, $this->getServiceCall($id, new Reference($id, ContainerInterface::NULL_ON_INVALID_REFERENCE)));
+                }
+            }
+        }
+
+        if ('' !== $code) {
+            $code .= "\n";
+        }
+
+        return $code;
+    }
+
+    /**
+     * Generates code for the proxies to be attached after the container class.
+     *
+     * @return string
+     */
+    private function addProxyClasses()
+    {
+        /* @var $definitions Definition[] */
+        $definitions = array_filter(
+            $this->container->getDefinitions(),
+            array($this->getProxyDumper(), 'isProxyCandidate')
+        );
+        $code = '';
+        $strip = '' === $this->docStar && method_exists('Symfony\Component\HttpKernel\Kernel', 'stripComments');
+
+        foreach ($definitions as $definition) {
+            $proxyCode = "\n".$this->getProxyDumper()->getProxyCode($definition);
+            if ($strip) {
+                $proxyCode = "<?php\n".$proxyCode;
+                $proxyCode = substr(Kernel::stripComments($proxyCode), 5);
+            }
+            $code .= $proxyCode;
+        }
+
+        return $code;
+    }
+
+    /**
+     * Generates the require_once statement for service includes.
+     *
+     * @param string     $id         The service id
+     * @param Definition $definition
+     *
+     * @return string
+     */
+    private function addServiceInclude($id, $definition)
+    {
+        $template = "        require_once %s;\n";
+        $code = '';
+
+        if (null !== $file = $definition->getFile()) {
+            $code .= sprintf($template, $this->dumpValue($file));
+        }
+
+        foreach ($this->getInlinedDefinitions($definition) as $definition) {
+            if (null !== $file = $definition->getFile()) {
+                $code .= sprintf($template, $this->dumpValue($file));
+            }
+        }
+
+        if ('' !== $code) {
+            $code .= "\n";
+        }
+
+        return $code;
+    }
+
+    /**
+     * Generates the inline definition of a service.
+     *
+     * @param string     $id
+     * @param Definition $definition
+     *
+     * @return string
+     *
+     * @throws RuntimeException                  When the factory definition is incomplete
+     * @throws ServiceCircularReferenceException When a circular reference is detected
+     */
+    private function addServiceInlinedDefinitions($id, $definition)
+    {
+        $code = '';
+        $variableMap = $this->definitionVariables;
+        $nbOccurrences = new \SplObjectStorage();
+        $processed = new \SplObjectStorage();
+        $inlinedDefinitions = $this->getInlinedDefinitions($definition);
+
+        foreach ($inlinedDefinitions as $definition) {
+            if (false === $nbOccurrences->contains($definition)) {
+                $nbOccurrences->offsetSet($definition, 1);
+            } else {
+                $i = $nbOccurrences->offsetGet($definition);
+                $nbOccurrences->offsetSet($definition, $i + 1);
+            }
+        }
+
+        foreach ($inlinedDefinitions as $sDefinition) {
+            if ($processed->contains($sDefinition)) {
+                continue;
+            }
+            $processed->offsetSet($sDefinition);
+
+            $class = $this->dumpValue($sDefinition->getClass());
+            if ($nbOccurrences->offsetGet($sDefinition) > 1 || $sDefinition->getMethodCalls() || $sDefinition->getProperties() || null !== $sDefinition->getConfigurator() || false !== strpos($class, '$')) {
+                $name = $this->getNextVariableName();
+                $variableMap->offsetSet($sDefinition, new Variable($name));
+
+                // a construct like:
+                // $a = new ServiceA(ServiceB $b); $b = new ServiceB(ServiceA $a);
+                // this is an indication for a wrong implementation, you can circumvent this problem
+                // by setting up your service structure like this:
+                // $b = new ServiceB();
+                // $a = new ServiceA(ServiceB $b);
+                // $b->setServiceA(ServiceA $a);
+                if ($this->hasReference($id, $sDefinition->getArguments())) {
+                    throw new ServiceCircularReferenceException($id, array($id));
+                }
+
+                $code .= $this->addNewInstance($sDefinition, '$'.$name, ' = ', $id);
+
+                if (!$this->hasReference($id, $sDefinition->getMethodCalls(), true) && !$this->hasReference($id, $sDefinition->getProperties(), true)) {
+                    $code .= $this->addServiceProperties(null, $sDefinition, $name);
+                    $code .= $this->addServiceMethodCalls(null, $sDefinition, $name);
+                    $code .= $this->addServiceConfigurator(null, $sDefinition, $name);
+                }
+
+                $code .= "\n";
+            }
+        }
+
+        return $code;
+    }
+
+    /**
+     * Adds the service return statement.
+     *
+     * @param string     $id         Service id
+     * @param Definition $definition
+     *
+     * @return string
+     */
+    private function addServiceReturn($id, $definition)
+    {
+        if ($this->isSimpleInstance($id, $definition)) {
+            return "    }\n";
+        }
+
+        return "\n        return \$instance;\n    }\n";
+    }
+
+    /**
+     * Generates the service instance.
+     *
+     * @param string     $id
+     * @param Definition $definition
+     *
+     * @return string
+     *
+     * @throws InvalidArgumentException
+     * @throws RuntimeException
+     */
+    private function addServiceInstance($id, Definition $definition)
+    {
+        $class = $definition->getClass();
+
+        if ('\\' === substr($class, 0, 1)) {
+            $class = substr($class, 1);
+        }
+
+        $class = $this->dumpValue($class);
+
+        if (0 === strpos($class, "'") && false === strpos($class, '$') && !preg_match('/^\'[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*(\\\{2}[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)*\'$/', $class)) {
+            throw new InvalidArgumentException(sprintf('"%s" is not a valid class name for the "%s" service.', $class, $id));
+        }
+
+        $simple = $this->isSimpleInstance($id, $definition);
+        $isProxyCandidate = $this->getProxyDumper()->isProxyCandidate($definition);
+        $instantiation = '';
+
+        if (!$isProxyCandidate && $definition->isShared()) {
+            $instantiation = "\$this->services['$id'] = ".($simple ? '' : '$instance');
+        } elseif (!$simple) {
+            $instantiation = '$instance';
+        }
+
+        $return = '';
+        if ($simple) {
+            $return = 'return ';
+        } else {
+            $instantiation .= ' = ';
+        }
+
+        $code = $this->addNewInstance($definition, $return, $instantiation, $id);
+
+        if (!$simple) {
+            $code .= "\n";
+        }
+
+        return $code;
+    }
+
+    /**
+     * Checks if the definition is a simple instance.
+     *
+     * @param string     $id
+     * @param Definition $definition
+     *
+     * @return bool
+     */
+    private function isSimpleInstance($id, Definition $definition)
+    {
+        foreach (array_merge(array($definition), $this->getInlinedDefinitions($definition)) as $sDefinition) {
+            if ($definition !== $sDefinition && !$this->hasReference($id, $sDefinition->getMethodCalls())) {
+                continue;
+            }
+
+            if ($sDefinition->getMethodCalls() || $sDefinition->getProperties() || $sDefinition->getConfigurator()) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * Adds method calls to a service definition.
+     *
+     * @param string     $id
+     * @param Definition $definition
+     * @param string     $variableName
+     *
+     * @return string
+     */
+    private function addServiceMethodCalls($id, Definition $definition, $variableName = 'instance')
+    {
+        $calls = '';
+        foreach ($definition->getMethodCalls() as $call) {
+            $arguments = array();
+            foreach ($call[1] as $value) {
+                $arguments[] = $this->dumpValue($value);
+            }
+
+            $calls .= $this->wrapServiceConditionals($call[1], sprintf("        \$%s->%s(%s);\n", $variableName, $call[0], implode(', ', $arguments)));
+        }
+
+        return $calls;
+    }
+
+    private function addServiceProperties($id, Definition $definition, $variableName = 'instance')
+    {
+        $code = '';
+        foreach ($definition->getProperties() as $name => $value) {
+            $code .= sprintf("        \$%s->%s = %s;\n", $variableName, $name, $this->dumpValue($value));
+        }
+
+        return $code;
+    }
+
+    /**
+     * Generates the inline definition setup.
+     *
+     * @param string     $id
+     * @param Definition $definition
+     *
+     * @return string
+     *
+     * @throws ServiceCircularReferenceException when the container contains a circular reference
+     */
+    private function addServiceInlinedDefinitionsSetup($id, Definition $definition)
+    {
+        $this->referenceVariables[$id] = new Variable('instance');
+
+        $code = '';
+        $processed = new \SplObjectStorage();
+        foreach ($this->getInlinedDefinitions($definition) as $iDefinition) {
+            if ($processed->contains($iDefinition)) {
+                continue;
+            }
+            $processed->offsetSet($iDefinition);
+
+            if (!$this->hasReference($id, $iDefinition->getMethodCalls(), true) && !$this->hasReference($id, $iDefinition->getProperties(), true)) {
+                continue;
+            }
+
+            // if the instance is simple, the return statement has already been generated
+            // so, the only possible way to get there is because of a circular reference
+            if ($this->isSimpleInstance($id, $definition)) {
+                throw new ServiceCircularReferenceException($id, array($id));
+            }
+
+            $name = (string) $this->definitionVariables->offsetGet($iDefinition);
+            $code .= $this->addServiceProperties(null, $iDefinition, $name);
+            $code .= $this->addServiceMethodCalls(null, $iDefinition, $name);
+            $code .= $this->addServiceConfigurator(null, $iDefinition, $name);
+        }
+
+        if ('' !== $code) {
+            $code .= "\n";
+        }
+
+        return $code;
+    }
+
+    /**
+     * Adds configurator definition.
+     *
+     * @param string     $id
+     * @param Definition $definition
+     * @param string     $variableName
+     *
+     * @return string
+     */
+    private function addServiceConfigurator($id, Definition $definition, $variableName = 'instance')
+    {
+        if (!$callable = $definition->getConfigurator()) {
+            return '';
+        }
+
+        if (is_array($callable)) {
+            if ($callable[0] instanceof Reference
+                || ($callable[0] instanceof Definition && $this->definitionVariables->contains($callable[0]))) {
+                return sprintf("        %s->%s(\$%s);\n", $this->dumpValue($callable[0]), $callable[1], $variableName);
+            }
+
+            $class = $this->dumpValue($callable[0]);
+            // If the class is a string we can optimize call_user_func away
+            if (0 === strpos($class, "'") && false === strpos($class, '$')) {
+                return sprintf("        %s::%s(\$%s);\n", $this->dumpLiteralClass($class), $callable[1], $variableName);
+            }
+
+            if (0 === strpos($class, 'new ')) {
+                return sprintf("        (%s)->%s(\$%s);\n", $this->dumpValue($callable[0]), $callable[1], $variableName);
+            }
+
+            return sprintf("        call_user_func(array(%s, '%s'), \$%s);\n", $this->dumpValue($callable[0]), $callable[1], $variableName);
+        }
+
+        return sprintf("        %s(\$%s);\n", $callable, $variableName);
+    }
+
+    /**
+     * Adds a service.
+     *
+     * @param string     $id
+     * @param Definition $definition
+     *
+     * @return string
+     */
+    private function addService($id, Definition $definition)
+    {
+        $this->definitionVariables = new \SplObjectStorage();
+        $this->referenceVariables = array();
+        $this->variableCount = 0;
+
+        $return = array();
+
+        if ($definition->isSynthetic()) {
+            $return[] = '@throws RuntimeException always since this service is expected to be injected dynamically';
+        } elseif ($class = $definition->getClass()) {
+            $class = $this->container->resolveEnvPlaceholders($class);
+            $return[] = sprintf('@return %s A %s instance', 0 === strpos($class, '%') ? 'object' : '\\'.ltrim($class, '\\'), ltrim($class, '\\'));
+        } elseif ($definition->getFactory()) {
+            $factory = $definition->getFactory();
+            if (is_string($factory)) {
+                $return[] = sprintf('@return object An instance returned by %s()', $factory);
+            } elseif (is_array($factory) && (is_string($factory[0]) || $factory[0] instanceof Definition || $factory[0] instanceof Reference)) {
+                if (is_string($factory[0]) || $factory[0] instanceof Reference) {
+                    $return[] = sprintf('@return object An instance returned by %s::%s()', (string) $factory[0], $factory[1]);
+                } elseif ($factory[0] instanceof Definition) {
+                    $return[] = sprintf('@return object An instance returned by %s::%s()', $factory[0]->getClass(), $factory[1]);
+                }
+            }
+        }
+
+        if ($definition->isDeprecated()) {
+            if ($return && 0 === strpos($return[count($return) - 1], '@return')) {
+                $return[] = '';
+            }
+
+            $return[] = sprintf('@deprecated %s', $definition->getDeprecationMessage($id));
+        }
+
+        $return = str_replace("\n     * \n", "\n     *\n", implode("\n     * ", $return));
+        $return = $this->container->resolveEnvPlaceholders($return);
+
+        $doc = '';
+        if ($definition->isShared()) {
+            $doc .= <<<'EOF'
+
+     *
+     * This service is shared.
+     * This method always returns the same instance of the service.
+EOF;
+        }
+
+        if (!$definition->isPublic()) {
+            $doc .= <<<'EOF'
+
+     *
+     * This service is private.
+     * If you want to be able to request this service from the container directly,
+     * make it public, otherwise you might end up with broken code.
+EOF;
+        }
+
+        if ($definition->isAutowired()) {
+            $doc .= <<<EOF
+
+     *
+     * This service is autowired.
+EOF;
+        }
+
+        if ($definition->isLazy()) {
+            $lazyInitialization = '$lazyLoad = true';
+            $lazyInitializationDoc = "\n     * @param bool    \$lazyLoad whether to try lazy-loading the service with a proxy\n     *";
+        } else {
+            $lazyInitialization = '';
+            $lazyInitializationDoc = '';
+        }
+
+        // with proxies, for 5.3.3 compatibility, the getter must be public to be accessible to the initializer
+        $isProxyCandidate = $this->getProxyDumper()->isProxyCandidate($definition);
+        $visibility = $isProxyCandidate ? 'public' : 'protected';
+        $methodName = $this->generateMethodName($id);
+        $code = <<<EOF
+
+    /*{$this->docStar}
+     * Gets the '$id' service.$doc
+     *$lazyInitializationDoc
+     * $return
+     */
+    {$visibility} function {$methodName}($lazyInitialization)
+    {
+
+EOF;
+
+        $code .= $isProxyCandidate ? $this->getProxyDumper()->getProxyFactoryCode($definition, $id, $methodName) : '';
+
+        if ($definition->isSynthetic()) {
+            $code .= sprintf("        throw new RuntimeException('You have requested a synthetic service (\"%s\"). The DIC does not know how to construct this service.');\n    }\n", $id);
+        } else {
+            if ($definition->isDeprecated()) {
+                $code .= sprintf("        @trigger_error(%s, E_USER_DEPRECATED);\n\n", $this->export($definition->getDeprecationMessage($id)));
+            }
+
+            $code .=
+                $this->addServiceInclude($id, $definition).
+                $this->addServiceLocalTempVariables($id, $definition).
+                $this->addServiceInlinedDefinitions($id, $definition).
+                $this->addServiceInstance($id, $definition).
+                $this->addServiceInlinedDefinitionsSetup($id, $definition).
+                $this->addServiceProperties($id, $definition).
+                $this->addServiceMethodCalls($id, $definition).
+                $this->addServiceConfigurator($id, $definition).
+                $this->addServiceReturn($id, $definition)
+            ;
+        }
+
+        $this->definitionVariables = null;
+        $this->referenceVariables = null;
+
+        return $code;
+    }
+
+    /**
+     * Adds multiple services.
+     *
+     * @return string
+     */
+    private function addServices()
+    {
+        $publicServices = $privateServices = '';
+        $definitions = $this->container->getDefinitions();
+        ksort($definitions);
+        foreach ($definitions as $id => $definition) {
+            if ($definition->isPublic()) {
+                $publicServices .= $this->addService($id, $definition);
+            } else {
+                $privateServices .= $this->addService($id, $definition);
+            }
+        }
+
+        return $publicServices.$privateServices;
+    }
+
+    private function addNewInstance(Definition $definition, $return, $instantiation, $id)
+    {
+        $class = $this->dumpValue($definition->getClass());
+
+        $arguments = array();
+        foreach ($definition->getArguments() as $value) {
+            $arguments[] = $this->dumpValue($value);
+        }
+
+        if (null !== $definition->getFactory()) {
+            $callable = $definition->getFactory();
+            if (is_array($callable)) {
+                if (!preg_match('/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*$/', $callable[1])) {
+                    throw new RuntimeException(sprintf('Cannot dump definition because of invalid factory method (%s)', $callable[1] ?: 'n/a'));
+                }
+
+                if ($callable[0] instanceof Reference
+                    || ($callable[0] instanceof Definition && $this->definitionVariables->contains($callable[0]))) {
+                    return sprintf("        $return{$instantiation}%s->%s(%s);\n", $this->dumpValue($callable[0]), $callable[1], $arguments ? implode(', ', $arguments) : '');
+                }
+
+                $class = $this->dumpValue($callable[0]);
+                // If the class is a string we can optimize call_user_func away
+                if (0 === strpos($class, "'") && false === strpos($class, '$')) {
+                    if ("''" === $class) {
+                        throw new RuntimeException(sprintf('Cannot dump definition: The "%s" service is defined to be created by a factory but is missing the service reference, did you forget to define the factory service id or class?', $id));
+                    }
+
+                    return sprintf("        $return{$instantiation}%s::%s(%s);\n", $this->dumpLiteralClass($class), $callable[1], $arguments ? implode(', ', $arguments) : '');
+                }
+
+                if (0 === strpos($class, 'new ')) {
+                    return sprintf("        $return{$instantiation}(%s)->%s(%s);\n", $this->dumpValue($callable[0]), $callable[1], $arguments ? implode(', ', $arguments) : '');
+                }
+
+                return sprintf("        $return{$instantiation}call_user_func(array(%s, '%s')%s);\n", $this->dumpValue($callable[0]), $callable[1], $arguments ? ', '.implode(', ', $arguments) : '');
+            }
+
+            return sprintf("        $return{$instantiation}%s(%s);\n", $this->dumpLiteralClass($this->dumpValue($callable)), $arguments ? implode(', ', $arguments) : '');
+        }
+
+        if (false !== strpos($class, '$')) {
+            return sprintf("        \$class = %s;\n\n        $return{$instantiation}new \$class(%s);\n", $class, implode(', ', $arguments));
+        }
+
+        return sprintf("        $return{$instantiation}new %s(%s);\n", $this->dumpLiteralClass($class), implode(', ', $arguments));
+    }
+
+    /**
+     * Adds the class headers.
+     *
+     * @param string $class     Class name
+     * @param string $baseClass The name of the base class
+     * @param string $namespace The class namespace
+     *
+     * @return string
+     */
+    private function startClass($class, $baseClass, $namespace)
+    {
+        $bagClass = $this->container->isFrozen() ? 'use Symfony\Component\DependencyInjection\ParameterBag\FrozenParameterBag;' : 'use Symfony\Component\DependencyInjection\ParameterBag\\ParameterBag;';
+        $namespaceLine = $namespace ? "namespace $namespace;\n" : '';
+
+        return <<<EOF
+<?php
+$namespaceLine
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Exception\LogicException;
+use Symfony\Component\DependencyInjection\Exception\RuntimeException;
+$bagClass
+
+/*{$this->docStar}
+ * $class.
+ *
+ * This class has been auto-generated
+ * by the Symfony Dependency Injection Component.
+ */
+class $class extends $baseClass
+{
+    private \$parameters;
+    private \$targetDirs = array();
+
+EOF;
+    }
+
+    /**
+     * Adds the constructor.
+     *
+     * @return string
+     */
+    private function addConstructor()
+    {
+        $targetDirs = $this->exportTargetDirs();
+        $arguments = $this->container->getParameterBag()->all() ? 'new ParameterBag($this->getDefaultParameters())' : null;
+
+        $code = <<<EOF
+
+    /*{$this->docStar}
+     * Constructor.
+     */
+    public function __construct()
+    {{$targetDirs}
+        parent::__construct($arguments);
+
+EOF;
+
+        $code .= $this->addMethodMap();
+        $code .= $this->addPrivateServices();
+        $code .= $this->addAliases();
+
+        $code .= <<<'EOF'
+    }
+
+EOF;
+
+        return $code;
+    }
+
+    /**
+     * Adds the constructor for a frozen container.
+     *
+     * @return string
+     */
+    private function addFrozenConstructor()
+    {
+        $targetDirs = $this->exportTargetDirs();
+
+        $code = <<<EOF
+
+    /*{$this->docStar}
+     * Constructor.
+     */
+    public function __construct()
+    {{$targetDirs}
+EOF;
+
+        if ($this->container->getParameterBag()->all()) {
+            $code .= "\n        \$this->parameters = \$this->getDefaultParameters();\n";
+        }
+
+        $code .= "\n        \$this->services = array();\n";
+        $code .= $this->addMethodMap();
+        $code .= $this->addPrivateServices();
+        $code .= $this->addAliases();
+
+        $code .= <<<'EOF'
+    }
+
+EOF;
+
+        return $code;
+    }
+
+    /**
+     * Adds the constructor for a frozen container.
+     *
+     * @return string
+     */
+    private function addFrozenCompile()
+    {
+        return <<<EOF
+
+    /*{$this->docStar}
+     * {@inheritdoc}
+     */
+    public function compile()
+    {
+        throw new LogicException('You cannot compile a dumped frozen container.');
+    }
+
+EOF;
+    }
+
+    /**
+     * Adds the isFrozen method for a frozen container.
+     *
+     * @return string
+     */
+    private function addIsFrozenMethod()
+    {
+        return <<<EOF
+
+    /*{$this->docStar}
+     * {@inheritdoc}
+     */
+    public function isFrozen()
+    {
+        return true;
+    }
+
+EOF;
+    }
+
+    /**
+     * Adds the methodMap property definition.
+     *
+     * @return string
+     */
+    private function addMethodMap()
+    {
+        if (!$definitions = $this->container->getDefinitions()) {
+            return '';
+        }
+
+        $code = "        \$this->methodMap = array(\n";
+        ksort($definitions);
+        foreach ($definitions as $id => $definition) {
+            $code .= '            '.$this->export($id).' => '.$this->export($this->generateMethodName($id)).",\n";
+        }
+
+        return $code."        );\n";
+    }
+
+    /**
+     * Adds the privates property definition.
+     *
+     * @return string
+     */
+    private function addPrivateServices()
+    {
+        if (!$definitions = $this->container->getDefinitions()) {
+            return '';
+        }
+
+        $code = '';
+        ksort($definitions);
+        foreach ($definitions as $id => $definition) {
+            if (!$definition->isPublic()) {
+                $code .= '            '.$this->export($id)." => true,\n";
+            }
+        }
+
+        if (empty($code)) {
+            return '';
+        }
+
+        $out = "        \$this->privates = array(\n";
+        $out .= $code;
+        $out .= "        );\n";
+
+        return $out;
+    }
+
+    /**
+     * Adds the aliases property definition.
+     *
+     * @return string
+     */
+    private function addAliases()
+    {
+        if (!$aliases = $this->container->getAliases()) {
+            return $this->container->isFrozen() ? "\n        \$this->aliases = array();\n" : '';
+        }
+
+        $code = "        \$this->aliases = array(\n";
+        ksort($aliases);
+        foreach ($aliases as $alias => $id) {
+            $id = (string) $id;
+            while (isset($aliases[$id])) {
+                $id = (string) $aliases[$id];
+            }
+            $code .= '            '.$this->export($alias).' => '.$this->export($id).",\n";
+        }
+
+        return $code."        );\n";
+    }
+
+    /**
+     * Adds default parameters method.
+     *
+     * @return string
+     */
+    private function addDefaultParametersMethod()
+    {
+        if (!$this->container->getParameterBag()->all()) {
+            return '';
+        }
+
+        $php = array();
+        $dynamicPhp = array();
+
+        foreach ($this->container->getParameterBag()->all() as $key => $value) {
+            if ($key !== $resolvedKey = $this->container->resolveEnvPlaceholders($key)) {
+                throw new InvalidArgumentException(sprintf('Parameter name cannot use env parameters: %s.', $resolvedKey));
+            }
+            $export = $this->exportParameters(array($value));
+            $export = explode('0 => ', substr(rtrim($export, " )\n"), 7, -1), 2);
+
+            if (preg_match("/\\\$this->(?:getEnv\('\w++'\)|targetDirs\[\d++\])/", $export[1])) {
+                $dynamicPhp[$key] = sprintf('%scase %s: $value = %s; break;', $export[0], $this->export($key), $export[1]);
+            } else {
+                $php[] = sprintf('%s%s => %s,', $export[0], $this->export($key), $export[1]);
+            }
+        }
+        $parameters = sprintf("array(\n%s\n%s)", implode("\n", $php), str_repeat(' ', 8));
+
+        $code = '';
+        if ($this->container->isFrozen()) {
+            $code .= <<<'EOF'
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getParameter($name)
+    {
+        $name = strtolower($name);
+
+        if (!(isset($this->parameters[$name]) || array_key_exists($name, $this->parameters) || isset($this->loadedDynamicParameters[$name]))) {
+            throw new InvalidArgumentException(sprintf('The parameter "%s" must be defined.', $name));
+        }
+        if (isset($this->loadedDynamicParameters[$name])) {
+            return $this->loadedDynamicParameters[$name] ? $this->dynamicParameters[$name] : $this->getDynamicParameter($name);
+        }
+
+        return $this->parameters[$name];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function hasParameter($name)
+    {
+        $name = strtolower($name);
+
+        return isset($this->parameters[$name]) || array_key_exists($name, $this->parameters) || isset($this->loadedDynamicParameters[$name]);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setParameter($name, $value)
+    {
+        throw new LogicException('Impossible to call set() on a frozen ParameterBag.');
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getParameterBag()
+    {
+        if (null === $this->parameterBag) {
+            $parameters = $this->parameters;
+            foreach ($this->loadedDynamicParameters as $name => $loaded) {
+                $parameters[$name] = $loaded ? $this->dynamicParameters[$name] : $this->getDynamicParameter($name);
+            }
+            $this->parameterBag = new FrozenParameterBag($parameters);
+        }
+
+        return $this->parameterBag;
+    }
+
+EOF;
+            if ('' === $this->docStar) {
+                $code = str_replace('/**', '/*', $code);
+            }
+
+            if ($dynamicPhp) {
+                $loadedDynamicParameters = $this->exportParameters(array_combine(array_keys($dynamicPhp), array_fill(0, count($dynamicPhp), false)), '', 8);
+                $getDynamicParameter = <<<'EOF'
+        switch ($name) {
+%s
+            default: throw new InvalidArgumentException(sprintf('The dynamic parameter "%%s" must be defined.', $name));
+        }
+        $this->loadedDynamicParameters[$name] = true;
+
+        return $this->dynamicParameters[$name] = $value;
+EOF;
+                $getDynamicParameter = sprintf($getDynamicParameter, implode("\n", $dynamicPhp));
+            } else {
+                $loadedDynamicParameters = 'array()';
+                $getDynamicParameter = str_repeat(' ', 8).'throw new InvalidArgumentException(sprintf(\'The dynamic parameter "%s" must be defined.\', $name));';
+            }
+
+            $code .= <<<EOF
+
+    private \$loadedDynamicParameters = {$loadedDynamicParameters};
+    private \$dynamicParameters = array();
+
+    /*{$this->docStar}
+     * Computes a dynamic parameter.
+     *
+     * @param string The name of the dynamic parameter to load
+     *
+     * @return mixed The value of the dynamic parameter
+     *
+     * @throws InvalidArgumentException When the dynamic parameter does not exist
+     */
+    private function getDynamicParameter(\$name)
+    {
+{$getDynamicParameter}
+    }
+
+EOF;
+        } elseif ($dynamicPhp) {
+            throw new RuntimeException('You cannot dump a not-frozen container with dynamic parameters.');
+        }
+
+        $code .= <<<EOF
+
+    /*{$this->docStar}
+     * Gets the default parameters.
+     *
+     * @return array An array of the default parameters
+     */
+    protected function getDefaultParameters()
+    {
+        return $parameters;
+    }
+
+EOF;
+
+        return $code;
+    }
+
+    /**
+     * Exports parameters.
+     *
+     * @param array  $parameters
+     * @param string $path
+     * @param int    $indent
+     *
+     * @return string
+     *
+     * @throws InvalidArgumentException
+     */
+    private function exportParameters(array $parameters, $path = '', $indent = 12)
+    {
+        $php = array();
+        foreach ($parameters as $key => $value) {
+            if (is_array($value)) {
+                $value = $this->exportParameters($value, $path.'/'.$key, $indent + 4);
+            } elseif ($value instanceof Variable) {
+                throw new InvalidArgumentException(sprintf('You cannot dump a container with parameters that contain variable references. Variable "%s" found in "%s".', $value, $path.'/'.$key));
+            } elseif ($value instanceof Definition) {
+                throw new InvalidArgumentException(sprintf('You cannot dump a container with parameters that contain service definitions. Definition for "%s" found in "%s".', $value->getClass(), $path.'/'.$key));
+            } elseif ($value instanceof Reference) {
+                throw new InvalidArgumentException(sprintf('You cannot dump a container with parameters that contain references to other services (reference to service "%s" found in "%s").', $value, $path.'/'.$key));
+            } elseif ($value instanceof Expression) {
+                throw new InvalidArgumentException(sprintf('You cannot dump a container with parameters that contain expressions. Expression "%s" found in "%s".', $value, $path.'/'.$key));
+            } else {
+                $value = $this->export($value);
+            }
+
+            $php[] = sprintf('%s%s => %s,', str_repeat(' ', $indent), $this->export($key), $value);
+        }
+
+        return sprintf("array(\n%s\n%s)", implode("\n", $php), str_repeat(' ', $indent - 4));
+    }
+
+    /**
+     * Ends the class definition.
+     *
+     * @return string
+     */
+    private function endClass()
+    {
+        return <<<'EOF'
+}
+
+EOF;
+    }
+
+    /**
+     * Wraps the service conditionals.
+     *
+     * @param string $value
+     * @param string $code
+     *
+     * @return string
+     */
+    private function wrapServiceConditionals($value, $code)
+    {
+        if (!$services = ContainerBuilder::getServiceConditionals($value)) {
+            return $code;
+        }
+
+        $conditions = array();
+        foreach ($services as $service) {
+            $conditions[] = sprintf("\$this->has('%s')", $service);
+        }
+
+        // re-indent the wrapped code
+        $code = implode("\n", array_map(function ($line) { return $line ? '    '.$line : $line; }, explode("\n", $code)));
+
+        return sprintf("        if (%s) {\n%s        }\n", implode(' && ', $conditions), $code);
+    }
+
+    /**
+     * Builds service calls from arguments.
+     *
+     * @param array $arguments
+     * @param array &$calls    By reference
+     * @param array &$behavior By reference
+     */
+    private function getServiceCallsFromArguments(array $arguments, array &$calls, array &$behavior)
+    {
+        foreach ($arguments as $argument) {
+            if (is_array($argument)) {
+                $this->getServiceCallsFromArguments($argument, $calls, $behavior);
+            } elseif ($argument instanceof Reference) {
+                $id = (string) $argument;
+
+                if (!isset($calls[$id])) {
+                    $calls[$id] = 0;
+                }
+                if (!isset($behavior[$id])) {
+                    $behavior[$id] = $argument->getInvalidBehavior();
+                } elseif (ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE !== $behavior[$id]) {
+                    $behavior[$id] = $argument->getInvalidBehavior();
+                }
+
+                ++$calls[$id];
+            }
+        }
+    }
+
+    /**
+     * Returns the inline definition.
+     *
+     * @param Definition $definition
+     *
+     * @return array
+     */
+    private function getInlinedDefinitions(Definition $definition)
+    {
+        if (false === $this->inlinedDefinitions->contains($definition)) {
+            $definitions = array_merge(
+                $this->getDefinitionsFromArguments($definition->getArguments()),
+                $this->getDefinitionsFromArguments($definition->getMethodCalls()),
+                $this->getDefinitionsFromArguments($definition->getProperties()),
+                $this->getDefinitionsFromArguments(array($definition->getConfigurator())),
+                $this->getDefinitionsFromArguments(array($definition->getFactory()))
+            );
+
+            $this->inlinedDefinitions->offsetSet($definition, $definitions);
+
+            return $definitions;
+        }
+
+        return $this->inlinedDefinitions->offsetGet($definition);
+    }
+
+    /**
+     * Gets the definition from arguments.
+     *
+     * @param array $arguments
+     *
+     * @return array
+     */
+    private function getDefinitionsFromArguments(array $arguments)
+    {
+        $definitions = array();
+        foreach ($arguments as $argument) {
+            if (is_array($argument)) {
+                $definitions = array_merge($definitions, $this->getDefinitionsFromArguments($argument));
+            } elseif ($argument instanceof Definition) {
+                $definitions = array_merge(
+                    $definitions,
+                    $this->getInlinedDefinitions($argument),
+                    array($argument)
+                );
+            }
+        }
+
+        return $definitions;
+    }
+
+    /**
+     * Checks if a service id has a reference.
+     *
+     * @param string $id
+     * @param array  $arguments
+     * @param bool   $deep
+     * @param array  $visited
+     *
+     * @return bool
+     */
+    private function hasReference($id, array $arguments, $deep = false, array &$visited = array())
+    {
+        foreach ($arguments as $argument) {
+            if (is_array($argument)) {
+                if ($this->hasReference($id, $argument, $deep, $visited)) {
+                    return true;
+                }
+            } elseif ($argument instanceof Reference) {
+                $argumentId = (string) $argument;
+                if ($id === $argumentId) {
+                    return true;
+                }
+
+                if ($deep && !isset($visited[$argumentId]) && 'service_container' !== $argumentId) {
+                    $visited[$argumentId] = true;
+
+                    $service = $this->container->getDefinition($argumentId);
+
+                    // if the proxy manager is enabled, disable searching for references in lazy services,
+                    // as these services will be instantiated lazily and don't have direct related references.
+                    if ($service->isLazy() && !$this->getProxyDumper() instanceof NullDumper) {
+                        continue;
+                    }
+
+                    $arguments = array_merge($service->getMethodCalls(), $service->getArguments(), $service->getProperties());
+
+                    if ($this->hasReference($id, $arguments, $deep, $visited)) {
+                        return true;
+                    }
+                }
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Dumps values.
+     *
+     * @param mixed $value
+     * @param bool  $interpolate
+     *
+     * @return string
+     *
+     * @throws RuntimeException
+     */
+    private function dumpValue($value, $interpolate = true)
+    {
+        if (is_array($value)) {
+            $code = array();
+            foreach ($value as $k => $v) {
+                $code[] = sprintf('%s => %s', $this->dumpValue($k, $interpolate), $this->dumpValue($v, $interpolate));
+            }
+
+            return sprintf('array(%s)', implode(', ', $code));
+        } elseif ($value instanceof Definition) {
+            if (null !== $this->definitionVariables && $this->definitionVariables->contains($value)) {
+                return $this->dumpValue($this->definitionVariables->offsetGet($value), $interpolate);
+            }
+            if ($value->getMethodCalls()) {
+                throw new RuntimeException('Cannot dump definitions which have method calls.');
+            }
+            if ($value->getProperties()) {
+                throw new RuntimeException('Cannot dump definitions which have properties.');
+            }
+            if (null !== $value->getConfigurator()) {
+                throw new RuntimeException('Cannot dump definitions which have a configurator.');
+            }
+
+            $arguments = array();
+            foreach ($value->getArguments() as $argument) {
+                $arguments[] = $this->dumpValue($argument);
+            }
+
+            if (null !== $value->getFactory()) {
+                $factory = $value->getFactory();
+
+                if (is_string($factory)) {
+                    return sprintf('%s(%s)', $this->dumpLiteralClass($this->dumpValue($factory)), implode(', ', $arguments));
+                }
+
+                if (is_array($factory)) {
+                    if (!preg_match('/^[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*$/', $factory[1])) {
+                        throw new RuntimeException(sprintf('Cannot dump definition because of invalid factory method (%s)', $factory[1] ?: 'n/a'));
+                    }
+
+                    if (is_string($factory[0])) {
+                        return sprintf('%s::%s(%s)', $this->dumpLiteralClass($this->dumpValue($factory[0])), $factory[1], implode(', ', $arguments));
+                    }
+
+                    if ($factory[0] instanceof Definition) {
+                        return sprintf("call_user_func(array(%s, '%s')%s)", $this->dumpValue($factory[0]), $factory[1], count($arguments) > 0 ? ', '.implode(', ', $arguments) : '');
+                    }
+
+                    if ($factory[0] instanceof Reference) {
+                        return sprintf('%s->%s(%s)', $this->dumpValue($factory[0]), $factory[1], implode(', ', $arguments));
+                    }
+                }
+
+                throw new RuntimeException('Cannot dump definition because of invalid factory');
+            }
+
+            $class = $value->getClass();
+            if (null === $class) {
+                throw new RuntimeException('Cannot dump definitions which have no class nor factory.');
+            }
+
+            return sprintf('new %s(%s)', $this->dumpLiteralClass($this->dumpValue($class)), implode(', ', $arguments));
+        } elseif ($value instanceof Variable) {
+            return '$'.$value;
+        } elseif ($value instanceof Reference) {
+            if (null !== $this->referenceVariables && isset($this->referenceVariables[$id = (string) $value])) {
+                return $this->dumpValue($this->referenceVariables[$id], $interpolate);
+            }
+
+            return $this->getServiceCall((string) $value, $value);
+        } elseif ($value instanceof Expression) {
+            return $this->getExpressionLanguage()->compile((string) $value, array('this' => 'container'));
+        } elseif ($value instanceof Parameter) {
+            return $this->dumpParameter($value);
+        } elseif (true === $interpolate && is_string($value)) {
+            if (preg_match('/^%([^%]+)%$/', $value, $match)) {
+                // we do this to deal with non string values (Boolean, integer, ...)
+                // the preg_replace_callback converts them to strings
+                return $this->dumpParameter(strtolower($match[1]));
+            } else {
+                $replaceParameters = function ($match) {
+                    return "'.".$this->dumpParameter(strtolower($match[2])).".'";
+                };
+
+                $code = str_replace('%%', '%', preg_replace_callback('/(?<!%)(%)([^%]+)\1/', $replaceParameters, $this->export($value)));
+
+                return $code;
+            }
+        } elseif (is_object($value) || is_resource($value)) {
+            throw new RuntimeException('Unable to dump a service container if a parameter is an object or a resource.');
+        }
+
+        return $this->export($value);
+    }
+
+    /**
+     * Dumps a string to a literal (aka PHP Code) class value.
+     *
+     * @param string $class
+     *
+     * @return string
+     *
+     * @throws RuntimeException
+     */
+    private function dumpLiteralClass($class)
+    {
+        if (false !== strpos($class, '$')) {
+            return sprintf('${($_ = %s) && false ?: "_"}', $class);
+        }
+        if (0 !== strpos($class, "'") || !preg_match('/^\'[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*(\\\{2}[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)*\'$/', $class)) {
+            throw new RuntimeException(sprintf('Cannot dump definition because of invalid class name (%s)', $class ?: 'n/a'));
+        }
+
+        return '\\'.substr(str_replace('\\\\', '\\', $class), 1, -1);
+    }
+
+    /**
+     * Dumps a parameter.
+     *
+     * @param string $name
+     *
+     * @return string
+     */
+    private function dumpParameter($name)
+    {
+        if ($this->container->isFrozen() && $this->container->hasParameter($name)) {
+            return $this->dumpValue($this->container->getParameter($name), false);
+        }
+
+        return sprintf("\$this->getParameter('%s')", strtolower($name));
+    }
+
+    /**
+     * Gets a service call.
+     *
+     * @param string    $id
+     * @param Reference $reference
+     *
+     * @return string
+     */
+    private function getServiceCall($id, Reference $reference = null)
+    {
+        if ('service_container' === $id) {
+            return '$this';
+        }
+
+        if ($this->container->hasDefinition($id) && !$this->container->getDefinition($id)->isPublic()) {
+            // The following is PHP 5.5 syntax for what could be written as "(\$this->services['$id'] ?? \$this->{$this->generateMethodName($id)}())" on PHP>=7.0
+
+            return "\${(\$_ = isset(\$this->services['$id']) ? \$this->services['$id'] : \$this->{$this->generateMethodName($id)}()) && false ?: '_'}";
+        }
+        if (null !== $reference && ContainerInterface::EXCEPTION_ON_INVALID_REFERENCE !== $reference->getInvalidBehavior()) {
+            return sprintf('$this->get(\'%s\', ContainerInterface::NULL_ON_INVALID_REFERENCE)', $id);
+        }
+
+        if ($this->container->hasAlias($id)) {
+            $id = (string) $this->container->getAlias($id);
+        }
+
+        return sprintf('$this->get(\'%s\')', $id);
+    }
+
+    /**
+     * Initializes the method names map to avoid conflicts with the Container methods.
+     *
+     * @param string $class the container base class
+     */
+    private function initializeMethodNamesMap($class)
+    {
+        $this->serviceIdToMethodNameMap = array();
+        $this->usedMethodNames = array();
+
+        try {
+            $reflectionClass = new \ReflectionClass($class);
+            foreach ($reflectionClass->getMethods() as $method) {
+                $this->usedMethodNames[strtolower($method->getName())] = true;
+            }
+        } catch (\ReflectionException $e) {
+        }
+    }
+
+    /**
+     * Convert a service id to a valid PHP method name.
+     *
+     * @param string $id
+     *
+     * @return string
+     *
+     * @throws InvalidArgumentException
+     */
+    private function generateMethodName($id)
+    {
+        if (isset($this->serviceIdToMethodNameMap[$id])) {
+            return $this->serviceIdToMethodNameMap[$id];
+        }
+
+        $name = Container::camelize($id);
+        $name = preg_replace('/[^a-zA-Z0-9_\x7f-\xff]/', '', $name);
+        $methodName = 'get'.$name.'Service';
+        $suffix = 1;
+
+        while (isset($this->usedMethodNames[strtolower($methodName)])) {
+            ++$suffix;
+            $methodName = 'get'.$name.$suffix.'Service';
+        }
+
+        $this->serviceIdToMethodNameMap[$id] = $methodName;
+        $this->usedMethodNames[strtolower($methodName)] = true;
+
+        return $methodName;
+    }
+
+    /**
+     * Returns the next name to use.
+     *
+     * @return string
+     */
+    private function getNextVariableName()
+    {
+        $firstChars = self::FIRST_CHARS;
+        $firstCharsLength = strlen($firstChars);
+        $nonFirstChars = self::NON_FIRST_CHARS;
+        $nonFirstCharsLength = strlen($nonFirstChars);
+
+        while (true) {
+            $name = '';
+            $i = $this->variableCount;
+
+            if ('' === $name) {
+                $name .= $firstChars[$i % $firstCharsLength];
+                $i = (int) ($i / $firstCharsLength);
+            }
+
+            while ($i > 0) {
+                --$i;
+                $name .= $nonFirstChars[$i % $nonFirstCharsLength];
+                $i = (int) ($i / $nonFirstCharsLength);
+            }
+
+            ++$this->variableCount;
+
+            // check that the name is not reserved
+            if (in_array($name, $this->reservedVariables, true)) {
+                continue;
+            }
+
+            return $name;
+        }
+    }
+
+    private function getExpressionLanguage()
+    {
+        if (null === $this->expressionLanguage) {
+            if (!class_exists('Symfony\Component\ExpressionLanguage\ExpressionLanguage')) {
+                throw new RuntimeException('Unable to use expressions as the Symfony ExpressionLanguage component is not installed.');
+            }
+            $providers = $this->container->getExpressionLanguageProviders();
+            $this->expressionLanguage = new ExpressionLanguage(null, $providers);
+
+            if ($this->container->isTrackingResources()) {
+                foreach ($providers as $provider) {
+                    $this->container->addObjectResource($provider);
+                }
+            }
+        }
+
+        return $this->expressionLanguage;
+    }
+
+    private function exportTargetDirs()
+    {
+        return null === $this->targetDirRegex ? '' : <<<EOF
+
+        \$dir = __DIR__;
+        for (\$i = 1; \$i <= {$this->targetDirMaxMatches}; ++\$i) {
+            \$this->targetDirs[\$i] = \$dir = dirname(\$dir);
+        }
+EOF;
+    }
+
+    private function export($value)
+    {
+        if (null !== $this->targetDirRegex && is_string($value) && preg_match($this->targetDirRegex, $value, $matches, PREG_OFFSET_CAPTURE)) {
+            $prefix = $matches[0][1] ? $this->doExport(substr($value, 0, $matches[0][1])).'.' : '';
+            $suffix = $matches[0][1] + strlen($matches[0][0]);
+            $suffix = isset($value[$suffix]) ? '.'.$this->doExport(substr($value, $suffix)) : '';
+            $dirname = '__DIR__';
+
+            if (0 < $offset = 1 + $this->targetDirMaxMatches - count($matches)) {
+                $dirname = sprintf('$this->targetDirs[%d]', $offset);
+            }
+
+            if ($prefix || $suffix) {
+                return sprintf('(%s%s%s)', $prefix, $dirname, $suffix);
+            }
+
+            return $dirname;
+        }
+
+        return $this->doExport($value);
+    }
+
+    private function doExport($value)
+    {
+        $export = var_export($value, true);
+
+        if ("'" === $export[0] && $export !== $resolvedExport = $this->container->resolveEnvPlaceholders($export, "'.\$this->getEnv('%s').'")) {
+            $export = $resolvedExport;
+            if ("'" === $export[1]) {
+                $export = substr($export, 3);
+            }
+            if (".''" === substr($export, -3)) {
+                $export = substr($export, 0, -3);
+            }
+        }
+
+        return $export;
+    }
+}