/**
* Returns the matcher object.
*
* @param string $matcherIdentifier The matcher class.
* If it begins with a '\' it means it's a FQ class name, otherwise it is relative to
* eZ\Publish\Core\MVC\Symfony\View\ContentViewProvider\Configured\Matcher namespace.
*
* @throws \InvalidArgumentException
*
* @return \eZ\Publish\Core\MVC\Symfony\View\ContentViewProvider\Configured\Matcher
*/
protected function getMatcher($matcherIdentifier)
{
$matcher = parent::getMatcher($matcherIdentifier);
if (!$matcher instanceof Matcher) {
throw new InvalidArgumentException('Matcher for ContentViewProvider\\Configured must implement eZ\\Publish\\Core\\MVC\\Symfony\\View\\ContentViewProvider\\Configured\\Matcher interface.');
}
return $matcher;
}
