/**
* Gets a service.
*
* @param string $id The service identifier
*
* @return object The associated service
*
* @throw InvalidArgumentException if the service is not defined
* @throw LogicException if the service has a circular reference to itself
*/
public function getService($id)
{
try {
return parent::getService($id);
} catch (InvalidArgumentException $e) {
if (isset($this->loading[$id])) {
throw new LogicException(sprintf('The service "%s" has a circular reference to itself.', $id));
}
if (!$this->hasServiceDefinition($id) && isset($this->aliases[$id])) {
return $this->getService($this->aliases[$id]);
}
$definition = $this->getServiceDefinition($id);
$this->loading[$id] = true;
if ($definition->isShared()) {
$service = $this->services[$id] = $this->createService($definition);
} else {
$service = $this->createService($definition);
}
unset($this->loading[$id]);
return $service;
}
}
