#   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserve.
#
# 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.

__all__ = ['GraphPass', 'PruneParameterPass']


class GraphPass(object):
    """
    Base class for all graph pass.
    """

    def __init__(self):
        pass

    def apply(self, graph):
        pass


class PruneParameterPass(GraphPass):
    """
    Generate a graph for pruning parameters from target graph.
    """

    def __init__(self, pruned_params, thresholds):
        super(PruneParameterPass, self).__init__()
        self.pruned_params = pruned_params
        self.thresholds = thresholds
        self.default_threshold = thresholds['*']

    def apply(self, graph):
        pass