class DatabaseHandler(AbstractDatabaseHandler):
"""
Database Handler
Handling nosqlite database.
"""
def __init__(self, path=':memory:'):
"""
Initialize DatabaseHandler
:param path: Path to the database or ':memory:'
"""
self.path = path
self.connection = None
def connect(self):
"""
Connect to a database.
"""
self.close()
self.connection = Connection(self.path)
def close(self):
"""
Terminate the connection to the database
"""
if self.connection is not None:
self.connection.close()
def drop_collection(self, collection_name):
"""
Drops a collection permanently if it exists
:param collection_name: The collection's name
:return: True on success, else False
"""
return self.connection.drop_collection(collection_name)
def __getitem__(self, collection_name):
"""
Returns the handle to the collection
:param collection_name: The collection's name
:return: Collection handle
"""
collection = None
if self.connection:
collection = CollectionHandler(self.connection[collection_name])
return collection
def __enter__(self):
"""
Open up a connection
:return: DatabaseHandler
"""
self.connect()
return self
def __exit__(self, exc_type, exc_val, exc_traceback):
"""
Close connection
:return: False
"""
self.close()
return False
def connect(self):
"""
Connect to a database.
"""
self.close()
self.connection = Connection(self.path)