# Copyright 2013 Google Inc. 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.

"""Transforms CSV on Hadoop."""

from src.hadoop import hadoop_csv_transformer
from src.pipelines import pipeline


class HadoopCsvMatchReplace(pipeline.Pipeline):
  """Pipeline class to transform CSV on Hadoop."""

  @staticmethod
  def GetHelp():
    return """Match and replace in csv files using a hadoop cluster.

The stage config should look the same as for the CsvMatchReplace stage.
"""

  def run(self, config):
    """Initiate Hadoop MapReduce for CSV transformation.

    Args:
      config: Transform configuration in Python dictionary.
    """
    transformer = hadoop_csv_transformer.HadoopCsvTransformer(config)
    transformer.StartTransform()
