org.deeplearning4j.spark.ml.util.Identifiable.scala Maven / Gradle / Ivy

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/*
 * Copyright 2015 Skymind,Inc.
 *
 *    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 org.deeplearning4j.spark.ml.util

import java.util.UUID

/**
 * Trait for an object with an immutable unique ID that identifies itself and its derivatives.
 *
 * Copied from org.apache.spark.ml.util
 */
private[spark] trait Identifiable {

  /**
   * An immutable unique ID for the object and its derivatives.
   */
  val uid: String

  override def toString: String = uid
}

private[spark] object Identifiable {

  /**
   * Returns a random UID that concatenates the given prefix, "_", and 12 random hex chars.
   */
  def randomUID(prefix: String): String = {
    prefix + "_" + UUID.randomUUID().toString.takeRight(12)
  }
}