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# 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 ..loading import LiteralLocation, UriLocation
from .yaml import YamlReader
from .json import JsonReader
from .jinja import JinjaReader
from .exceptions import ReaderNotFoundError
EXTENSIONS = {
'.yaml': YamlReader,
'.json': JsonReader,
'.jinja': JinjaReader}
class ReaderSource(object):
"""
Base class for ARIA reader sources.
Reader sources provide appropriate :class:`Reader` instances for locations.
"""
@staticmethod
def get_reader(context, location, loader): # pylint: disable=unused-argument
raise ReaderNotFoundError('location: %s' % location)
class DefaultReaderSource(ReaderSource):
"""
The default ARIA reader source will generate a :class:`YamlReader` for
locations that end in ".yaml", a :class:`JsonReader` for locations that
end in ".json", and a :class:`JinjaReader` for locations that end in
".jinja".
"""
def __init__(self, literal_reader_class=YamlReader):
super(DefaultReaderSource, self).__init__()
self.literal_reader_class = literal_reader_class
def get_reader(self, context, location, loader):
if isinstance(location, LiteralLocation):
return self.literal_reader_class(context, location, loader)
elif isinstance(location, UriLocation):
for extension, reader_class in EXTENSIONS.iteritems():
if location.uri.endswith(extension):
return reader_class(context, location, loader)
return super(DefaultReaderSource, self).get_reader(context, location, loader)
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