org.apache.spark.util.SparkSerDeUtils.scala Maven / Gradle / Ivy

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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.
 */
package org.apache.spark.util

import java.io.{ByteArrayInputStream, ByteArrayOutputStream, ObjectInputStream, ObjectOutputStream, ObjectStreamClass}

private[spark] trait SparkSerDeUtils {
  /** Serialize an object using Java serialization */
  def serialize[T](o: T): Array[Byte] = {
    val bos = new ByteArrayOutputStream()
    val oos = new ObjectOutputStream(bos)
    oos.writeObject(o)
    oos.close()
    bos.toByteArray
  }

  /** Deserialize an object using Java serialization */
  def deserialize[T](bytes: Array[Byte]): T = {
    val bis = new ByteArrayInputStream(bytes)
    val ois = new ObjectInputStream(bis)
    ois.readObject.asInstanceOf[T]
  }

  /**
   * Deserialize an object using Java serialization and the given ClassLoader
   */
  def deserialize[T](bytes: Array[Byte], loader: ClassLoader): T = {
    val bis = new ByteArrayInputStream(bytes)
    val ois = new ObjectInputStream(bis) {
      override def resolveClass(desc: ObjectStreamClass): Class[_] = {
        // scalastyle:off classforname
        Class.forName(desc.getName, false, loader)
        // scalastyle:on classforname
      }
    }
    ois.readObject.asInstanceOf[T]
  }
}

private[spark] object SparkSerDeUtils extends SparkSerDeUtils