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# 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.
import codecs
from .loader import Loader
from .exceptions import LoaderException, DocumentNotFoundException
class FileTextLoader(Loader):
"""
ARIA file text loader.
Extracts a text document from a file. The default encoding is UTF-8, but other supported
encoding can be specified instead.
"""
def __init__(self, context, path, encoding='utf-8'):
self.context = context
self.path = path
self.encoding = encoding
self._file = None
def open(self):
try:
self._file = codecs.open(self.path, mode='r', encoding=self.encoding, buffering=1)
except IOError as e:
if e.errno == 2:
raise DocumentNotFoundException('file not found: "%s"' % self.path, cause=e)
else:
raise LoaderException('file I/O error: "%s"' % self.path, cause=e)
except Exception as e:
raise LoaderException('file error: "%s"' % self.path, cause=e)
def close(self):
if self._file is not None:
try:
self._file.close()
except IOError as e:
raise LoaderException('file I/O error: "%s"' % self.path, cause=e)
except Exception as e:
raise LoaderException('file error: "%s"' % self.path, cause=e)
def load(self):
if self._file is not None:
try:
return self._file.read()
except IOError as e:
raise LoaderException('file I/O error: "%s"' % self.path, cause=e)
except Exception as e:
raise LoaderException('file error %s' % self.path, cause=e)
return None
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