# Copyright 2018 The Shabda Authors. All Rights Reserved.
#
# 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.
"""
Factory class to get data iterator for experiments
"""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

import sys
from importlib import import_module

sys.path.append("../")


class DataIteratorFactory():
    """
    Factory class to import the data iterators dynamically.
    This is used in conjuction with experiments, where dataset can be plugged in
    with the change of the filename
    """

    iterator_path = {
        "mfcc_iterator": "shabda.data.iterators.mfcc_iterator",
        "audio_mfcc_librosa": "shabda.data.iterators.audio_mfcc_librosa",
        "lstm_features": "shabda.data.iterators.lstm_features"
    }

    iterators = {
        "mfcc_iterator": "MFCCDataIterator",
        "audio_mfcc_librosa": "AudioMFCC",
        "lstm_features": "LSTMFeatureIterator"
    }

    def __init__(self):
        pass

    @staticmethod
    def _get_iterator(name):
        """
        Finds the package and gets the class handle for the data iterator file name
        :param name:
        :return:
        """
        try:
            data_iterator = getattr(import_module(DataIteratorFactory.iterator_path[name]),
                                    DataIteratorFactory.iterators[name])
        except KeyError:
            raise NotImplemented("Given data iterator file name not found: {}".format(name))
        # Return the model class
        return data_iterator

    @staticmethod
    def get(iterator_name):
        """
        Returns the class handle for the given file name
        :param dataset_file_name:
        :return: class handle
        """
        iterator = DataIteratorFactory._get_iterator(iterator_name)
        return iterator

# Copyright 2018 The Shabda Authors. All Rights Reserved.
#
# 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.
"""
Factory class to get data iterator for experiments
"""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

import sys
from importlib import import_module

sys.path.append("../")


class DataIteratorFactory():
    """
    Factory class to import the data iterators dynamically.
    This is used in conjuction with experiments, where dataset can be plugged in
    with the change of the filename
    """

    iterator_path = {
        "mfcc_iterator": "shabda.data.iterators.mfcc_iterator",
        "audio_mfcc_librosa": "shabda.data.iterators.audio_mfcc_librosa",
        "lstm_features": "shabda.data.iterators.lstm_features"
    }

    iterators = {
        "mfcc_iterator": "MFCCDataIterator",
        "audio_mfcc_librosa": "AudioMFCC",
        "lstm_features": "LSTMFeatureIterator"
    }

    def __init__(self):
        pass

    @staticmethod
    def _get_iterator(name):
        """
        Finds the package and gets the class handle for the data iterator file name
        :param name:
        :return:
        """
        try:
            data_iterator = getattr(import_module(DataIteratorFactory.iterator_path[name]),
                                    DataIteratorFactory.iterators[name])
        except KeyError:
            raise NotImplemented("Given data iterator file name not found: {}".format(name))
        # Return the model class
        return data_iterator

    @staticmethod
    def get(iterator_name):
        """
        Returns the class handle for the given file name
        :param dataset_file_name:
        :return: class handle
        """
        iterator = DataIteratorFactory._get_iterator(iterator_name)
        return iterator

# Copyright 2018 The Shabda Authors. All Rights Reserved. # # 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. Factory class to get data iterator for experiments Factory class to import the data iterators dynamically.     This is used in conjuction with experiments, where dataset can be plugged in     with the change of the filename Finds the package and gets the class handle for the data iterator file name         :param name:         :return: # Return the model class Returns the class handle for the given file name         :param dataset_file_name:         :return: class handle