Doctrine\OXM\Mapping\MappingException::fileMappingDriversRequiresConfiguredDirectoryPath PHP Method

    public static function fileMappingDriversRequiresConfiguredDirectoryPath($path = null)
    {
        if (!empty($path)) {
            $path = '[' . $path . ']';
        }
        return new self('File mapping drivers must have a valid directory path, ' . 'however the given path ' . $path . ' seems to be incorrect!');
    }

 /**
  * {@inheritDoc}
  */
 public function getAllClassNames()
 {
     if ($this->classNames !== null) {
         return $this->classNames;
     }
     if (!$this->paths) {
         throw MappingException::pathRequired();
     }
     $classes = array();
     $includedFiles = array();
     foreach ($this->paths as $path) {
         if (!is_dir($path)) {
             throw MappingException::fileMappingDriversRequiresConfiguredDirectoryPath($path);
         }
         $iterator = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($path), \RecursiveIteratorIterator::LEAVES_ONLY);
         foreach ($iterator as $file) {
             if (($fileName = $file->getBasename($this->fileExtension)) == $file->getBasename()) {
                 continue;
             }
             $sourceFile = realpath($file->getPathName());
             require_once $sourceFile;
             $includedFiles[] = $sourceFile;
         }
     }
     $declared = get_declared_classes();
     foreach ($declared as $className) {
         $rc = new \ReflectionClass($className);
         $sourceFile = $rc->getFileName();
         if (in_array($sourceFile, $includedFiles) && !$this->isTransient($className)) {
             $classes[] = $className;
         }
     }
     $this->classNames = $classes;
     return $classes;
 }