# Copyright 2014 Google Inc.
#
# Licensed 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.

"""Shortcut methods for getting set up with Google Cloud Datastore.

You'll typically use these to get started with the API:

.. doctest:: constructors

   >>> from google.cloud import datastore
   >>>
   >>> client = datastore.Client()
   >>> key = client.key('EntityKind', 1234)
   >>> key
   <Key('EntityKind', 1234), project=...>
   >>> entity = datastore.Entity(key)
   >>> entity['answer'] = 42
   >>> entity
   <Entity('EntityKind', 1234) {'answer': 42}>
   >>> query = client.query(kind='EntityKind')

The main concepts with this API are:

- :class:`~google.cloud.datastore.client.Client`
  which represents a project (string) and namespace (string) bundled with
  a connection and has convenience methods for constructing objects with that
  project / namespace.

- :class:`~google.cloud.datastore.entity.Entity`
  which represents a single entity in the datastore
  (akin to a row in relational database world).

- :class:`~google.cloud.datastore.key.Key`
  which represents a pointer to a particular entity in the datastore
  (akin to a unique identifier in relational database world).

- :class:`~google.cloud.datastore.query.Query`
  which represents a lookup or search over the rows in the datastore.

- :class:`~google.cloud.datastore.transaction.Transaction`
  which represents an all-or-none transaction and enables consistency
  when race conditions may occur.
"""


from pkg_resources import get_distribution
__version__ = get_distribution('google-cloud-datastore').version

from google.cloud.datastore.batch import Batch
from google.cloud.datastore.client import Client
from google.cloud.datastore.entity import Entity
from google.cloud.datastore.key import Key
from google.cloud.datastore.query import Query
from google.cloud.datastore.transaction import Transaction

__all__ = ['__version__', 'Batch', 'Client', 'Entity', 'Key', 'Query',
           'Transaction']
