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/*
 * Copyright 2015-16, Yahoo! Inc.
 * Licensed under the terms of the Apache License 2.0. See LICENSE file at the project root for terms.
 */

package com.yahoo.sketches.tuple;

import com.yahoo.memory.Memory;

/**
 * The on-heap implementation of the Union set operation for tuple sketches of type
 * ArrayOfDoubles.
 */
final class HeapArrayOfDoublesUnion extends ArrayOfDoublesUnion {

  /**
   * Creates an instance of HeapArrayOfDoublesUnion with a custom seed
   * @param nomEntries Nominal number of entries. Forced to the nearest power of 2 greater than 
   * given value.
   * @param numValues Number of double values to keep for each key.
   * @param seed See seed
   */
  HeapArrayOfDoublesUnion(final int nomEntries, final int numValues, final long seed) {
    super(new HeapArrayOfDoublesQuickSelectSketch(nomEntries, 3, 1f, numValues, seed));
  }

  /**
   * This is to create an instance given a serialized form and a custom seed
   * @param mem See Memory
   * @param seed See seed
   */
  HeapArrayOfDoublesUnion(final Memory mem, final long seed) {
    super(new HeapArrayOfDoublesQuickSelectSketch(mem, seed));
  }

  @Override
  public void reset() {
    sketch_ = new HeapArrayOfDoublesQuickSelectSketch(nomEntries_, 3, 1f, numValues_, seed_);
    theta_ = sketch_.getThetaLong();
  }

}