blob: 4cba0b53b1e5179a0bb577c5c117756ee463505c [file] [log] [blame]
# 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.
from ...utils.openclose import OpenClose
from .exceptions import ReaderException
class Reader(object):
"""
Base class for ARIA readers.
Readers provide agnostic raw data by consuming :class:`aria.parser.loading.Loader` instances.
"""
def __init__(self, context, location, loader):
self.context = context
self.location = location
self.loader = loader
def load(self):
with OpenClose(self.loader) as loader:
data = loader.load()
if data is None:
raise ReaderException(u'loader did not provide data: {0}'.format(loader))
return data
def read(self):
raise NotImplementedError