/**
  * Constructor
  *
  * @param array|Traversable $options
  */
 public function __construct($options = array())
 {
     if ($options instanceof Traversable) {
         $options = ArrayUtils::iteratorToArray($options);
     }
     if (empty($options)) {
         $options = array();
     }
     if (!is_array($options)) {
         throw new Exception\InvalidArgumentException('Invalid options provided');
     }
     if (isset($options[self::DOCUMENT_CLASS])) {
         $this->setDocumentClass($options[self::DOCUMENT_CLASS]);
     }
     if (isset($options[self::DOCUMENTSET_CLASS])) {
         $this->setDocumentSetClass($options[self::DOCUMENTSET_CLASS]);
     }
     if (isset($options[self::QUERY_CLASS])) {
         $this->setQueryClass($options[self::QUERY_CLASS]);
     }
     // Build \ZendService\WindowsAzure\Storage\Blob instance
     if (!isset($options[self::HOST])) {
         $host = self::DEFAULT_HOST;
     } else {
         $host = $options[self::HOST];
     }
     if (!isset($options[self::ACCOUNT_NAME])) {
         throw new Exception\InvalidArgumentException('No Windows Azure account name provided.');
     }
     if (!isset($options[self::ACCOUNT_KEY])) {
         throw new Exception\InvalidArgumentException('No Windows Azure account key provided.');
     }
     // TODO: support $usePathStyleUri and $retryPolicy
     try {
         $this->_storageClient = new \ZendService\WindowsAzure\Storage\Table($host, $options[self::ACCOUNT_NAME], $options[self::ACCOUNT_KEY]);
         // Parse other options
         if (!empty($options[self::PROXY_HOST])) {
             $proxyHost = $options[self::PROXY_HOST];
             $proxyPort = isset($options[self::PROXY_PORT]) ? $options[self::PROXY_PORT] : 8080;
             $proxyCredentials = isset($options[self::PROXY_CREDENTIALS]) ? $options[self::PROXY_CREDENTIALS] : '';
             $this->_storageClient->setProxy(true, $proxyHost, $proxyPort, $proxyCredentials);
         }
         if (isset($options[self::HTTP_ADAPTER])) {
             $this->_storageClient->setHttpClientChannel($options[self::HTTP_ADAPTER]);
         }
     } catch (WindowsAzureException\ExceptionInterface $e) {
         throw new Exception\RuntimeException('Error on document service creation: ' . $e->getMessage(), $e->getCode(), $e);
     }
 }