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/*
 * Copyright 2016 sadikovi
 *
 * 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.
 */

package com.github.sadikovi.spark.util

import java.io.{ObjectInputStream, ObjectOutputStream}

import org.apache.hadoop.conf.Configuration

/**
 * Serializable hadoop configuration. Clone of `org.apache.spark.util.SerializableConfiguration`,
 * since it cannot be reused outside `spark` package.
 */
private[spark] class SerializableConfiguration(
    @transient var value: Configuration) extends Serializable {

  private def writeObject(out: ObjectOutputStream): Unit = {
    out.defaultWriteObject()
    value.write(out)
  }

  private def readObject(in: ObjectInputStream): Unit = {
    value = new Configuration(false)
    value.readFields(in)
  }
}