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Supplementary utilities for classes that belong to java.util, or are considered essential as to justify existence in java.util.

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/* Copyright (c) 2019 LibJ
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * You should have received a copy of The MIT License (MIT) along with this
 * program. If not, see .
 */

package org.libj.util.primitive;

import javax.annotation.Generated;

/**
 * A comparison function, which imposes a total ordering on some
 * collection of {@code double}s.
 */
@FunctionalInterface
@Generated(value="org.openjax.codegen.template.Templates", date="2024-02-27T13:50:20.763")
public interface DoubleComparator {
  /**
   * Comparator that compares two {@code double} values numerically.
   *
   * @see Double#compare(double,double)
   */
  public static final DoubleComparator NATURAL = Double::compare;

  /**
   * Comparator that compares two {@code double} values reverse numerically.
   *
   * @see #reverse()
   */
  public static final DoubleComparator REVERSE = NATURAL.reverse();

  /**
   * Compares its two arguments for order. Returns a negative integer, zero, or
   * a positive integer as the first argument is less than, equal to, or greater
   * than the second.
   *
   * @param f1 The first {@code double} to be compared.
   * @param f2 the second {@code double} to be compared.
   * @return A negative integer, zero, or a positive integer as the first
   *         argument is less than, equal to, or greater than the second.
   * @see java.util.Comparator#compare(Object,Object)
   */
  int compare(double f1, double f2);

  /**
   * Returns a comparator that imposes the reverse ordering of this comparator.
   *
   * @return A comparator that imposes the reverse ordering of this comparator.
   */
  default DoubleComparator reverse() {
    return (f1, f2) -> compare(f2, f1);
  }
}