text: # Licensed to the Apache Software Foundation (ASF) under one or more
  # contributor license agreements.  See the NOTICE file distributed with
  # this work for additional information regarding copyright ownership.
  # The ASF licenses this file to You under the Apache License, Version 2.0
  # (the "License"); you may not use this file except in compliance with
  # the License.  You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  __all__ = [
      "LibcloudError",
      "MalformedResponseError",
      "InvalidCredsError",
      "InvalidCredsException",
      "LazyList"
      ]
  
  
  class LibcloudError(Exception):
      """The base class for other libcloud exceptions"""
  
      def __init__(self, value, driver=None):
          self.value = value
          self.driver = driver
  
      def __str__(self):
          return self.__repr__()
  
      def __repr__(self):
          return ("<LibcloudError in "
                  + repr(self.driver)
                  + " "
                  + repr(self.value) + ">")
  
  
  class MalformedResponseError(LibcloudError):
      """Exception for the cases when a provider returns a malformed
      response, e.g. you request JSON and provider returns
      '<h3>something</h3>' due to some error on their side."""
  
      def __init__(self, value, body=None, driver=None):
          self.value = value
          self.driver = driver
          self.body = body
  
      def __str__(self):
          return self.__repr__()
  
      def __repr__(self):
          return ("<MalformedResponseException in "
                  + repr(self.driver)
                  + " "
                  + repr(self.value)
                  + ">: "
                  + repr(self.body))
  
  
  class InvalidCredsError(LibcloudError):
      """Exception used when invalid credentials are used on a provider."""
  
      def __init__(self, value='Invalid credentials with the provider',
                   driver=None):
          self.value = value
          self.driver = driver
  
      def __str__(self):
          return self.__repr__()
  
      def __repr__(self):
          return repr(self.value)
  
  
  # Deprecated alias of L{InvalidCredsError}
  InvalidCredsException = InvalidCredsError
  
  
  class LazyList(object):
  
      def __init__(self, get_more, value_dict=None):
          self._data = []
          self._last_key = None
          self._exhausted = False
          self._all_loaded = False
          self._get_more = get_more
          self._value_dict = value_dict or {}
  
      def __iter__(self):
          if not self._all_loaded:
              self._load_all()
  
          data = self._data
          for i in data:
              yield i
  
      def __getitem__(self, index):
          if index >= len(self._data) and not self._all_loaded:
              self._load_all()
  
          return self._data[index]
  
      def __len__(self):
          self._load_all()
          return len(self._data)
  
      def __repr__(self):
          self._load_all()
          repr_string = ', ' .join([repr(item) for item in self._data])
          repr_string = '[%s]' % (repr_string)
          return repr_string
  
      def _load_all(self):
          while not self._exhausted:
              newdata, self._last_key, self._exhausted = \
                       self._get_more(last_key=self._last_key,
                                      value_dict=self._value_dict)
              self._data.extend(newdata)
          self._all_loaded = True
  